Use real IP addresses for the US-based Cassinis

Change-Id: I158bb84261a56d71074155880c4359033b2f1044

.docker-travis.sh

@@ -5,17 +5,16 @@ set -e
 IMAGE_NAME=telecominfraproject/oopt-gnpy
 IMAGE_TAG=$(git describe --tags)
 
+if [[ "${TRAVIS_BRANCH}" == "experimental/2019-summit" ]]; then
+  IMAGE_NAME=telecominfraproject/oopt-gnpy-experimental
+fi
+
 ALREADY_FOUND=0
 docker pull ${IMAGE_NAME}:${IMAGE_TAG} && ALREADY_FOUND=1
 
 if [[ $ALREADY_FOUND == 0 ]]; then
   docker build . -t ${IMAGE_NAME}
   docker tag ${IMAGE_NAME} ${IMAGE_NAME}:${IMAGE_TAG}
-
-  # shared directory setup: do not clobber the real data
-  mkdir trash
-  cd trash
-  docker run -it --rm --volume $(pwd):/shared ${IMAGE_NAME} ./transmission_main_example.py
 else
   echo "Image ${IMAGE_NAME}:${IMAGE_TAG} already available, will just update the other tags"
 fi
@@ -43,5 +42,11 @@ if [[ "${TRAVIS_PULL_REQUEST}" == "false" ]]; then
       docker push ${IMAGE_NAME}:${IMAGE_TAG}
     fi
     docker push ${IMAGE_NAME}:stable
+  elif [[ "${TRAVIS_BRANCH}" == "experimental/2019-summit" ]]; then
+    echo "Publishing ad-hoc image for the TIP Summit demo"
+    do_docker_login
+    if [[ $ALREADY_FOUND == 0 ]]; then
+      docker push ${IMAGE_NAME}:${IMAGE_TAG}
+    fi
   fi
 fi

.zuul.yaml

@@ -0,0 +1,8 @@
+---
+- project:
+    check:
+      jobs:
+      - noop
+    gate:
+      jobs:
+      - noop

Dockerfile

@@ -2,6 +2,7 @@ FROM python:3.7-slim
 COPY . /oopt-gnpy
 WORKDIR /oopt-gnpy
 RUN python setup.py install
-WORKDIR /shared/examples
+WORKDIR /shared
 ENTRYPOINT ["/oopt-gnpy/.docker-entry.sh"]
-CMD ["/bin/bash"]
+CMD ["python", "examples/path_requests_run.py", "examples/2019-demo-topology.json", "examples/2019-demo-services.json", "examples/2019-demo-equipment.json", "--rest"]
+EXPOSE 5000

README.rst

@@ -27,7 +27,7 @@ Documentation: https://gnpy.readthedocs.io
 Get In Touch
 ~~~~~~~~~~~~
 
-There are `weekly calls <https://telecominfraproject.workplace.com/events/458339931322799/>`__ about our progress.
+There are `weekly calls <https://telecominfraproject.workplace.com/events/702894886867547/>`__ about our progress.
 Newcomers, users and telecom operators are especially welcome there.
 We encourage all interested people outside the TIP to `join the project <https://telecominfraproject.com/apply-for-membership/>`__.
 

examples/2019-demo-equipment.json

@@ -0,0 +1,124 @@
+{     "Edfa":[
+
+            {
+            "type_variety": "fixed27",
+            "type_def": "fixed_gain",
+            "gain_flatmax": 27,
+            "gain_min": 27,
+            "p_max": 21,
+            "nf0": 5.5,
+            "allowed_for_design": false
+            },
+
+            {
+            "type_variety": "fixed22",
+            "type_def": "fixed_gain",
+            "gain_flatmax": 22,
+            "gain_min": 22,
+            "p_max": 21,
+            "nf0": 5.5,
+            "allowed_for_design": false
+            }
+      ],
+      "Fiber":[{
+            "type_variety": "SSMF",
+            "dispersion": 1.67e-05,
+            "gamma": 0.00127
+            },
+            {
+            "type_variety": "NZDF",
+            "dispersion": 0.5e-05,
+            "gamma": 0.00146
+            },
+            {
+            "type_variety": "LOF",
+            "dispersion": 2.2e-05,
+            "gamma": 0.000843
+            }
+      ],
+      "Span":[{
+            "power_mode": false,
+            "delta_power_range_db": [-2,3,0.5],
+            "max_fiber_lineic_loss_for_raman": 0.25,
+            "target_extended_gain": 2.5,
+            "max_length": 150,
+            "length_units": "km",
+            "max_loss": 28,
+            "padding": 10,
+            "EOL": 0,
+            "con_in": 0,
+            "con_out": 0
+            }
+      ],
+      "Roadm":[{
+            "target_pch_out_db": -25,
+            "add_drop_osnr": 30.00,
+            "restrictions": {
+                            "preamp_variety_list":[],
+                            "booster_variety_list":[]
+                            }            
+            }],
+      "SI":[{
+            "f_min": 191.6e12,
+            "baud_rate": 32e9,
+            "f_max":195.1e12,
+            "spacing": 50e9,
+            "power_dbm": 0,
+            "power_range_db": [0,0,1],
+            "roll_off": 0.15,
+            "tx_osnr": 40,
+            "sys_margins": 2
+            }],
+      "Transceiver":[
+            {
+            "type_variety": "Cassini",
+            "frequency":{
+                        "min": 191.35e12,
+                        "max": 196.1e12
+                        },
+            "mode":[
+                       {
+
+                       "format": "dp-qpsk",
+                       "baud_rate": 32e9,
+                       "OSNR": 11,
+                       "bit_rate": 100e9,
+                       "roll_off": 0.15,
+                       "tx_osnr": 40,
+                       "min_spacing": 37.5e9,
+                       "cost":1
+                       },
+                       {
+                       "format": "16-qam",
+                       "baud_rate": 66e9,
+                       "OSNR": 15,
+                       "bit_rate": 200e9,
+                       "roll_off": 0.15,
+                       "tx_osnr": 40,
+                       "min_spacing": 75e9,
+                       "cost":1
+                       }
+                   ]
+            },
+            {
+            "type_variety": "Voyager",
+            "frequency":{
+                        "min": 191.35e12,
+                        "max": 196.1e12
+                        },
+            "mode":[
+                       {
+                       "format": "mode 1",
+                       "baud_rate": 32e9,
+                       "OSNR": 12,
+                       "bit_rate": 100e9,
+                       "roll_off": 0.15,
+                       "tx_osnr": 40,
+                       "min_spacing": 37.5e9,
+                       "cost":1
+                       }
+                   ]
+            }
+      ]
+
+}

examples/2019-demo-services.json

@@ -0,0 +1,67 @@
+{
+  "path-request": [
+    {
+      "request-id": "first",
+      "source": "netconf:10.0.254.93:830",
+      "destination": "netconf:10.0.254.94:830",
+      "src-tp-id": "trx-Amsterdam",
+      "dst-tp-id": "trx-Bremen",
+      "bidirectional": true,
+      "path-constraints": {
+        "te-bandwidth": {
+          "technology": "flexi-grid",
+          "trx_type": "Cassini",
+          "trx_mode": null,
+          "effective-freq-slot": [
+            {
+              "N": "null",
+              "M": "null"
+            }
+          ],
+          "spacing": 50000000000.0,
+          "max-nb-of-channel": null,
+          "output-power": null,
+          "path_bandwidth": 100000000000.0
+        }
+      }
+    },
+    {
+      "request-id": "second",
+      "source": "netconf:10.0.254.93:830",
+      "destination": "netconf:10.0.254.94:830",
+      "src-tp-id": "trx-Amsterdam",
+      "dst-tp-id": "trx-Bremen",
+      "bidirectional": true,
+      "path-constraints": {
+        "te-bandwidth": {
+          "technology": "flexi-grid",
+          "trx_type": "Cassini",
+          "trx_mode": null,
+          "effective-freq-slot": [
+            {
+              "N": "null",
+              "M": "null"
+            }
+          ],
+          "spacing": 50000000000.0,
+          "max-nb-of-channel": null,
+          "output-power": null,
+          "path_bandwidth": 100000000000.0
+        }
+      }
+    }
+  ],
+  "synchronization": [
+    {
+      "synchronization-id": "some redundancy please",
+      "svec": {
+        "relaxable": "false",
+        "disjointness": "node link",
+        "request-id-number": [
+          "first",
+          "second"
+        ]
+      }
+    }
+  ]
+}

examples/2019-generate-tip-demo.py

@@ -0,0 +1,179 @@
+# How many nodes in the ring topology? Up to eight is supported, then I ran out of cities..
+HOW_MANY = 3
+
+# city names
+ALL_CITIES = [
+    'Amsterdam',
+    'Bremen',
+    'Cologne',
+    'Dueseldorf',
+    'Eindhoven',
+    'Frankfurt',
+    'Ghent',
+    'Hague',
+]
+# end of configurable parameters
+
+
+J = {
+    "elements": [],
+    "connections": [],
+}
+
+def unidir_join(a, b):
+    global J
+    J["connections"].append(
+        {"from_node": a, "to_node": b}
+    )
+
+def mk_edfa(name, gain, voa=0.0):
+    global J
+    J["elements"].append(
+        {"uid": name, "type": "Edfa", "type_variety": f"fixed{gain}", "operational": {"gain_target": gain, "out_voa": voa}}
+    )
+
+def add_att(a, b, att):
+    global J
+    if att > 0:
+        uid = f"att-({a})-({b})"
+    else:
+        uid = f"splice-({a})-({b})"
+    J["elements"].append(
+        {"uid": uid, "type": "Fused", "params": {"loss": att}},
+    )
+    unidir_join(a, uid)
+    unidir_join(uid, b)
+    return uid
+
+def build_fiber(city1, city2):
+    global J
+    J["elements"].append(
+        {
+            "uid": f"fiber-{city1}-{city2}",
+            "type": "Fiber",
+            "type_variety": "SSMF",
+            "params": {
+                "length": 50,
+                "length_units": "km",
+                "loss_coef": 0.2,
+                "con_in": 1.5,
+                "con_out": 1.5,
+            }
+        }
+    )
+
+def unidir_patch(a, b):
+    global J
+    uid = f"patch-({a})-({b})"
+    J["elements"].append(
+        {
+            "uid": uid,
+            "type": "Fiber",
+            "type_variety": "SSMF",
+            "params": {
+                "length": 0,
+                "length_units": "km",
+                "loss_coef": 0.2,
+                "con_in": 0.5,
+                "con_out": 0.5,
+            }
+        }
+    )
+    add_att(a, uid, 0.0)
+    add_att(uid, b, 0.0)
+
+for CITY in (ALL_CITIES[x] for x in range(0, HOW_MANY)):
+    J["elements"].append(
+        {"uid": f"trx-{CITY}", "type": "Transceiver"}
+    )
+    target_pwr = [
+        {"to_node": f"trx-{CITY}", "target_pch_out_db": -25},
+        {"to_node": f"splice-(roadm-{CITY}-AD)-(patch-(roadm-{CITY}-AD)-(roadm-{CITY}-L1))", "target_pch_out_db": -12},
+        {"to_node": f"splice-(roadm-{CITY}-AD)-(patch-(roadm-{CITY}-AD)-(roadm-{CITY}-L2))", "target_pch_out_db": -12},
+    ]
+    J["elements"].append(
+        {"uid": f"roadm-{CITY}-AD", "type": "Roadm", "params": {"target_pch_out_db": -2.0, "per_degree_target_pch_out_db": target_pwr}}
+    )
+    unidir_join(f"trx-{CITY}", f"roadm-{CITY}-AD")
+    unidir_join(f"roadm-{CITY}-AD", f"trx-{CITY}")
+
+    for n in (1,2):
+        target_pwr = [
+            {"to_node": f"roadm-{CITY}-L{n}-booster", "target_pch_out_db": -23},
+            {"to_node": f"splice-(roadm-{CITY}-L{n})-(patch-(roadm-{CITY}-L{n})-(roadm-{CITY}-AD))", "target_pch_out_db": -12},
+        ]
+        for m in (1,2):
+            if m == n:
+                continue
+            target_pwr.append(
+              {"to_node": f"splice-(roadm-{CITY}-L{n})-(patch-(roadm-{CITY}-L{n})-(roadm-{CITY}-L{m}))", "target_pch_out_db": -12},
+            )
+        J["elements"].append(
+            {"uid": f"roadm-{CITY}-L{n}", "type": "Roadm", "params": {"target_pch_out_db": -23.0, "per_degree_target_pch_out_db": target_pwr}}
+        )
+        mk_edfa(f"roadm-{CITY}-L{n}-booster", 22)
+        mk_edfa(f"roadm-{CITY}-L{n}-preamp", 27)
+        unidir_join(f"roadm-{CITY}-L{n}", f"roadm-{CITY}-L{n}-booster")
+        unidir_join(f"roadm-{CITY}-L{n}-preamp", f"roadm-{CITY}-L{n}")
+
+        unidir_patch(f"roadm-{CITY}-AD", f"roadm-{CITY}-L{n}")
+        unidir_patch(f"roadm-{CITY}-L{n}", f"roadm-{CITY}-AD")
+        for m in (1,2):
+            if m == n:
+                continue
+            #add_att(f"roadm-{CITY}-L{n}", f"roadm-{CITY}-L{m}", 22)
+            unidir_patch(f"roadm-{CITY}-L{n}", f"roadm-{CITY}-L{m}")
+
+for city1, city2 in ((ALL_CITIES[i], ALL_CITIES[i + 1] if i < HOW_MANY - 1 else ALL_CITIES[0]) for i in range(0, HOW_MANY)):
+    build_fiber(city1, city2)
+    unidir_join(f"roadm-{city1}-L1-booster", f"fiber-{city1}-{city2}")
+    unidir_join(f"fiber-{city1}-{city2}", f"roadm-{city2}-L2-preamp")
+    build_fiber(city2, city1)
+    unidir_join(f"roadm-{city2}-L2-booster", f"fiber-{city2}-{city1}")
+    unidir_join(f"fiber-{city2}-{city1}", f"roadm-{city1}-L1-preamp")
+
+
+for _, E in enumerate(J["elements"]):
+    uid = E["uid"]
+    if uid.startswith("roadm-") and (uid.endswith("-L1-booster") or uid.endswith("-L2-booster")):
+        E["operational"]["out_voa"] = 12.0
+    #if uid.endswith("-AD-add"):
+    #    E["operational"]["out_voa"] = 21
+
+translate = {
+    #"trx-Amsterdam": "10.0.254.93",
+    #"trx-Bremen": "10.0.254.94",
+    "trx-Amsterdam": "10.0.254.76",
+    "trx-Bremen": "10.0.254.77",
+
+    # Amsterdam A/D: coherent-v9u
+    "roadm-Amsterdam-AD": "10.0.254.107",
+    # Bremen A/D: -spi
+    "roadm-Bremen-AD": "10.0.254.225",
+
+    # Amsterdam -> Bremen ...QR79
+    "roadm-Amsterdam-L1": "10.0.254.78",
+    # Bremen -> Amsterdam ...QCP9
+    "roadm-Bremen-L2": "10.0.254.102",
+
+    # Bremen -> Cologne ...WKP
+    "roadm-Bremen-L1": "10.0.254.100",
+    # Cologne -> Bremen ...QLK6
+    "roadm-Cologne-L2": "10.0.254.104",
+
+    # Cologne -> Amsterdam ...TQQ
+    "roadm-Cologne-L1": "10.0.254.99",
+    # Amsterdam -> Cologne ...Q7JS
+    "roadm-Amsterdam-L2": "10.0.254.79",
+
+    # spare Line/Degree ...QC8B
+    "spare-line-degree": "10.0.254.101",
+    # spare Add/Drop: ...NNN
+    "spare-add-drop": "10.0.254.228",
+}
+
+import json
+s = json.dumps(J, indent=2)
+for (old, new) in translate.items():
+    s = s.replace(f'"{old}"', f'"netconf:{new}:830"')
+print(s)

examples/meshTopologyExampleV2_services.json

@@ -6,6 +6,7 @@
       "destination": "trx Vannes_KBE",
       "src-tp-id": "trx Lorient_KMA",
       "dst-tp-id": "trx Vannes_KBE",
+      "bidirectional": false,
       "path-constraints": {
         "te-bandwidth": {
           "technology": "flexi-grid",
@@ -30,6 +31,7 @@
       "destination": "trx Vannes_KBE",
       "src-tp-id": "trx Brest_KLA",
       "dst-tp-id": "trx Vannes_KBE",
+      "bidirectional": false,
       "path-constraints": {
         "te-bandwidth": {
           "technology": "flexi-grid",
@@ -94,6 +96,7 @@
       "destination": "trx Rennes_STA",
       "src-tp-id": "trx Lannion_CAS",
       "dst-tp-id": "trx Rennes_STA",
+      "bidirectional": false,
       "path-constraints": {
         "te-bandwidth": {
           "technology": "flexi-grid",
@@ -118,6 +121,7 @@
       "destination": "trx Lannion_CAS",
       "src-tp-id": "trx Rennes_STA",
       "dst-tp-id": "trx Lannion_CAS",
+      "bidirectional": false,
       "path-constraints": {
         "te-bandwidth": {
           "technology": "flexi-grid",
@@ -142,6 +146,7 @@
       "destination": "trx Lannion_CAS",
       "src-tp-id": "trx Rennes_STA",
       "dst-tp-id": "trx Lannion_CAS",
+      "bidirectional": false,
       "path-constraints": {
         "te-bandwidth": {
           "technology": "flexi-grid",
@@ -166,6 +171,7 @@
       "destination": "trx Lorient_KMA",
       "src-tp-id": "trx Lannion_CAS",
       "dst-tp-id": "trx Lorient_KMA",
+      "bidirectional": false,
       "path-constraints": {
         "te-bandwidth": {
           "technology": "flexi-grid",
@@ -190,6 +196,7 @@
       "destination": "trx Lorient_KMA",
       "src-tp-id": "trx Lannion_CAS",
       "dst-tp-id": "trx Lorient_KMA",
+      "bidirectional": false,
       "path-constraints": {
         "te-bandwidth": {
           "technology": "flexi-grid",
@@ -214,6 +221,7 @@
       "destination": "trx Lorient_KMA",
       "src-tp-id": "trx Lannion_CAS",
       "dst-tp-id": "trx Lorient_KMA",
+      "bidirectional": false,
       "path-constraints": {
         "te-bandwidth": {
           "technology": "flexi-grid",

examples/path_requests_run.py

@@ -18,37 +18,59 @@ from pathlib import Path
 from collections import namedtuple
 from logging import getLogger, basicConfig, CRITICAL, DEBUG, INFO
 from json import dumps, loads
-from networkx import (draw_networkx_nodes, draw_networkx_edges,
-                      draw_networkx_labels)
 from numpy import mean
 from gnpy.core.service_sheet import convert_service_sheet, Request_element, Element
 from gnpy.core.utils import load_json
-from gnpy.core.network import load_network, build_network, save_network
+from gnpy.core.network import load_network, build_network, save_network, network_from_json
-from gnpy.core.equipment import load_equipment, trx_mode_params, automatic_nch, automatic_spacing
+from gnpy.core.equipment import load_equipment, trx_mode_params, automatic_nch
-from gnpy.core.elements import Transceiver, Roadm, Edfa, Fused, Fiber
+from gnpy.core.elements import Transceiver, Roadm
 from gnpy.core.utils import db2lin, lin2db
-from gnpy.core.request import (Path_request, Result_element, compute_constrained_path,
+from gnpy.core.request import (Path_request, Result_element,
-                              propagate, jsontocsv, Disjunction, compute_path_dsjctn, requests_aggregation,
+                               propagate, jsontocsv, Disjunction, compute_path_dsjctn,
-                              propagate_and_optimize_mode)
+                               requests_aggregation, propagate_and_optimize_mode,
-from gnpy.core.exceptions import ConfigurationError, EquipmentConfigError, NetworkTopologyError
+                               BLOCKING_NOPATH, BLOCKING_NOMODE,
+                               find_reversed_path)
+from gnpy.core.exceptions import (ConfigurationError, EquipmentConfigError, NetworkTopologyError,
+                                  ServiceError, DisjunctionError)
 import gnpy.core.ansi_escapes as ansi_escapes
+from gnpy.core.spectrum_assignment import (build_oms_list, pth_assign_spectrum)
 from copy import copy, deepcopy
 from textwrap import dedent
 from math import ceil
 
+from flask import Flask, jsonify, make_response, request
+from flask_restful import Api, Resource, reqparse, fields
+
 #EQPT_LIBRARY_FILENAME = Path(__file__).parent / 'eqpt_config.json'
 
-logger = getLogger(__name__)
+LOGGER = getLogger(__name__)
 
-parser = ArgumentParser(description = 'A function that computes performances for a list of services provided in a json file or an excel sheet.')
+PARSER = ArgumentParser(description='A function that computes performances for a list of ' +
-parser.add_argument('network_filename', nargs='?', type = Path, default= Path(__file__).parent / 'meshTopologyExampleV2.xls')
+                        'services provided in a json file or an excel sheet.')
-parser.add_argument('service_filename', nargs='?', type = Path, default= Path(__file__).parent / 'meshTopologyExampleV2.xls')
+PARSER.add_argument('network_filename', nargs='?', type=Path,\
-parser.add_argument('eqpt_filename', nargs='?', type = Path, default=Path(__file__).parent / 'eqpt_config.json')
+                    default=Path(__file__).parent / 'meshTopologyExampleV2.xls',\
-parser.add_argument('-v', '--verbose', action='count', default=0, help='increases verbosity for each occurence')
+                    help='input topology file in xls or json')
-parser.add_argument('-o', '--output', type = Path)
+PARSER.add_argument('service_filename', nargs='?', type=Path,\
+                    default=Path(__file__).parent / 'meshTopologyExampleV2.xls',\
+                    help='input service file in xls or json')
+PARSER.add_argument('eqpt_filename', nargs='?', type=Path,\
+                    default=Path(__file__).parent / 'eqpt_config.json',\
+                    help='input equipment library in json. Default is eqpt_config.json')
+PARSER.add_argument('-bi', '--bidir', action='store_true',\
+                    help='considers that all demands are bidir')
+PARSER.add_argument('-v', '--verbose', action='count', default=0,\
+                    help='increases verbosity for each occurence')
+PARSER.add_argument('-o', '--output', type=Path)
+PARSER.add_argument('-r', '--rest', action='count', default=0, help='use the REST API')
 
+NETWORK_FILENAME = 'topoDemov1.json' #'disagregatedTopoDemov1.json' #
 
-def requests_from_json(json_data,equipment):
+APP = Flask(__name__, static_url_path="")
+API = Api(APP)
+
+def requests_from_json(json_data, equipment):
+    """ converts the json data into a list of requests elements
+    """
     requests_list = []
 
     for req in json_data['path-request']:
@@ -56,12 +78,13 @@ def requests_from_json(json_data,equipment):
         params = {}
         params['request_id'] = req['request-id']
         params['source'] = req['source']
+        params['bidir'] = req['bidirectional']
         params['destination'] = req['destination']
         params['trx_type'] = req['path-constraints']['te-bandwidth']['trx_type']
         params['trx_mode'] = req['path-constraints']['te-bandwidth']['trx_mode']
         params['format'] = params['trx_mode']
         params['spacing'] = req['path-constraints']['te-bandwidth']['spacing']
-        try :
+        try:
             nd_list = req['explicit-route-objects']['route-object-include-exclude']
         except KeyError:
             nd_list = []
@@ -70,7 +93,7 @@ def requests_from_json(json_data,equipment):
         # recover trx physical param (baudrate, ...) from type and mode
         # in trx_mode_params optical power is read from equipment['SI']['default'] and
         # nb_channel is computed based on min max frequency and spacing
-        trx_params = trx_mode_params(equipment,params['trx_type'],params['trx_mode'],True)
+        trx_params = trx_mode_params(equipment, params['trx_type'], params['trx_mode'], True)
         params.update(trx_params)
         # print(trx_params['min_spacing'])
         # optical power might be set differently in the request. if it is indicated then the
@@ -89,13 +112,13 @@ def requests_from_json(json_data,equipment):
                 params['nb_channel'] = nch
                 spacing = params['spacing']
                 params['f_max'] = f_min + nch*spacing
-            else :
+            else:
-                params['nb_channel'] = automatic_nch(f_min,f_max_from_si,params['spacing'])
+                params['nb_channel'] = automatic_nch(f_min, f_max_from_si, params['spacing'])
         except KeyError:
-            params['nb_channel'] = automatic_nch(f_min,f_max_from_si,params['spacing'])
+            params['nb_channel'] = automatic_nch(f_min, f_max_from_si, params['spacing'])
         consistency_check(params, f_max_from_si)
 
-        try :
+        try:
             params['path_bandwidth'] = req['path-constraints']['te-bandwidth']['path_bandwidth']
         except KeyError:
             pass
@@ -103,30 +126,35 @@ def requests_from_json(json_data,equipment):
     return requests_list
 
 def consistency_check(params, f_max_from_si):
+    """ checks that the requested parameters are consistant (spacing vs nb channel,
+        vs transponder mode...)
+    """
     f_min = params['f_min']
     f_max = params['f_max']
-    max_recommanded_nb_channels = automatic_nch(f_min,f_max,
+    max_recommanded_nb_channels = automatic_nch(f_min, f_max, params['spacing'])
-                params['spacing'])
     if params['baud_rate'] is not None:
         #implicitely means that a mode is defined with min_spacing
-        if params['min_spacing']>params['spacing'] : 
+        if params['min_spacing'] > params['spacing']:
-            msg = f'Request {params["request_id"]} has spacing below transponder {params["trx_type"]}'+\
+            msg = f'Request {params["request_id"]} has spacing below transponder ' +\
-                f' {params["trx_mode"]} min spacing value {params["min_spacing"]*1e-9}GHz.\n'+\
+                  f'{params["trx_type"]} {params["trx_mode"]} min spacing value ' +\
-                'Computation stopped'
+                  f'{params["min_spacing"]*1e-9}GHz.\nComputation stopped'
             print(msg)
-            logger.critical(msg)
+            LOGGER.critical(msg)
-            exit()
+            raise ServiceError(msg)
-        if f_max>f_max_from_si:
+        if f_max > f_max_from_si:
             msg = dedent(f'''
             Requested channel number {params["nb_channel"]}, baud rate {params["baud_rate"]} GHz and requested spacing {params["spacing"]*1e-9}GHz 
             is not consistent with frequency range {f_min*1e-12} THz, {f_max*1e-12} THz, min recommanded spacing {params["min_spacing"]*1e-9}GHz.
             max recommanded nb of channels is {max_recommanded_nb_channels}
             Computation stopped.''')
-            logger.critical(msg)
+            LOGGER.critical(msg)
-            exit()    
+            raise ServiceError(msg)
 
 
 def disjunctions_from_json(json_data):
+    """ reads the disjunction requests from the json dict and create the list
+        of requested disjunctions for this set of requests
+    """
     disjunctions_list = []
     try:
         temp_test = json_data['synchronization']
@@ -145,238 +173,397 @@ def disjunctions_from_json(json_data):
     return disjunctions_list
 
 
-def load_requests(filename,eqpt_filename):
+def load_requests(filename, eqpt_filename, bidir):
+    """ loads the requests from a json or an excel file into a data string
+    """
     if filename.suffix.lower() == '.xls':
-        logger.info('Automatically converting requests from XLS to JSON')
+        LOGGER.info('Automatically converting requests from XLS to JSON')
-        json_data = convert_service_sheet(filename,eqpt_filename)
+        try:
+            json_data = convert_service_sheet(filename, eqpt_filename, bidir=bidir)
+        except ServiceError as this_e:
+            print(f'{ansi_escapes.red}Service error:{ansi_escapes.reset} {this_e}')
+            exit(1)
     else:
-        with open(filename, encoding='utf-8') as f:
+        with open(filename, encoding='utf-8') as my_f:
-            json_data = loads(f.read())
+            json_data = loads(my_f.read())
     return json_data
 
 def compute_path_with_disjunction(network, equipment, pathreqlist, pathlist):
-    
+    """ use a list but a dictionnary might be helpful to find path based on request_id
-    # use a list but a dictionnary might be helpful to find path bathsed on request_id
+        TODO change all these req, dsjct, res lists into dict !
-    # TODO change all these req, dsjct, res lists into dict !
+    """
     path_res_list = []
+    reversed_path_res_list = []
+    propagated_reversed_path_res_list = []
 
-    for i,pathreq in enumerate(pathreqlist):
+    for i, pathreq in enumerate(pathreqlist):
 
-        # use the power specified in requests but might be different from the one specified for design
+        # use the power specified in requests but might be different from the one
-        # the power is an optional parameter for requests definition
+        # specified for design the power is an optional parameter for requests
-        # if optional, use the one defines in eqt_config.json
+        # definition if optional, use the one defines in eqt_config.json
         p_db = lin2db(pathreq.power*1e3)
         p_total_db = p_db + lin2db(pathreq.nb_channel)
         print(f'request {pathreq.request_id}')
         print(f'Computing path from {pathreq.source} to {pathreq.destination}')
-        print(f'with path constraint: {[pathreq.source]+pathreq.nodes_list}') #adding first node to be clearer on the output
+        # adding first node to be clearer on the output
+        print(f'with path constraint: {[pathreq.source] + pathreq.nodes_list}')
 
-        total_path = pathlist[i]
+        # pathlist[i] contains the whole path information for request i
-        print(f'Computed path (roadms):{[e.uid for e in total_path  if isinstance(e, Roadm)]}\n')
+        # last element is a transciver and where the result of the propagation is
+        # recorded.
+        # Important Note: since transceivers attached to roadms are actually logical
+        # elements to simulate performance, several demands having the same destination
+        # may use the same transponder for the performance simulation. This is why
+        # we use deepcopy: to ensure that each propagation is recorded and not overwritten
+        total_path = deepcopy(pathlist[i])
+        print(f'Computed path (roadms):{[e.uid for e in total_path  if isinstance(e, Roadm)]}')
         # for debug
         # print(f'{pathreq.baud_rate}   {pathreq.power}   {pathreq.spacing}   {pathreq.nb_channel}')
-        if total_path :
+        if total_path:
             if pathreq.baud_rate is not None:
-                total_path = propagate(total_path,pathreq,equipment)
+                # means that at this point the mode was entered/forced by user and thus a
-                # for el in total_path: print(el)
+                # baud_rate was defined
-                temp_snr01nm = round(mean(total_path[-1].snr+lin2db(pathreq.baud_rate/(12.5e9))),2)
+                total_path = propagate(total_path, pathreq, equipment)
-                if temp_snr01nm < pathreq.OSNR :
+                temp_snr01nm = round(mean(total_path[-1].snr+lin2db(pathreq.baud_rate/(12.5e9))), 2)
-                    msg = f'\tWarning! Request {pathreq.request_id} computed path from {pathreq.source} to {pathreq.destination} does not pass with {pathreq.tsp_mode}\n' +\
+                if temp_snr01nm < pathreq.OSNR:
-                    f'\tcomputedSNR in 0.1nm = {temp_snr01nm} - required osnr {pathreq.OSNR}\n'
+                    msg = f'\tWarning! Request {pathreq.request_id} computed path from' +\
+                          f' {pathreq.source} to {pathreq.destination} does not pass with' +\
+                          f' {pathreq.tsp_mode}\n\tcomputedSNR in 0.1nm = {temp_snr01nm} ' +\
+                          f'- required osnr {pathreq.OSNR}'
                     print(msg)
-                    logger.warning(msg)
+                    LOGGER.warning(msg)
-                    total_path = []
+                    pathreq.blocking_reason = 'MODE_NOT_FEASIBLE'
             else:
-                total_path,mode = propagate_and_optimize_mode(total_path,pathreq,equipment)
+                total_path, mode = propagate_and_optimize_mode(total_path, pathreq, equipment)
-                # if no baudrate satisfies spacing, no mode is returned and an empty path is returned
+                # if no baudrate satisfies spacing, no mode is returned and the last explored mode
                 # a warning is shown in the propagate_and_optimize_mode
-                if mode is not None :
+                # propagate_and_optimize_mode function returns the mode with the highest bitrate
-                    # propagate_and_optimize_mode function returns the mode with the highest bitrate
+                # that passes. if no mode passes, then a attribute blocking_reason is added on
-                    # that passes. if no mode passes, then it returns an empty path
+                # pathreq that contains the reason for blocking: 'NO_PATH', 'NO_FEASIBLE_MODE', ...
+                try:
+                    if pathreq.blocking_reason in BLOCKING_NOPATH:
+                        total_path = []
+                    elif pathreq.blocking_reason in BLOCKING_NOMODE:
+                        pathreq.baud_rate = mode['baud_rate']
+                        pathreq.tsp_mode = mode['format']
+                        pathreq.format = mode['format']
+                        pathreq.OSNR = mode['OSNR']
+                        pathreq.tx_osnr = mode['tx_osnr']
+                        pathreq.bit_rate = mode['bit_rate']
+                    # other blocking reason should not appear at this point
+                except AttributeError:
                     pathreq.baud_rate = mode['baud_rate']
                     pathreq.tsp_mode = mode['format']
                     pathreq.format = mode['format']
                     pathreq.OSNR = mode['OSNR']
                     pathreq.tx_osnr = mode['tx_osnr']
                     pathreq.bit_rate = mode['bit_rate']
-                else :
-                    total_path = []
-        # we record the last tranceiver object in order to have th whole 
-        # information about spectrum. Important Note: since transceivers 
-        # attached to roadms are actually logical elements to simulate
-        # performance, several demands having the same destination may use 
-        # the same transponder for the performance simaulation. This is why 
-        # we use deepcopy: to ensure each propagation is recorded and not 
-        # overwritten 
 
-        path_res_list.append(deepcopy(total_path))
+            # reversed path is needed for correct spectrum assignment
-    return path_res_list
+            reversed_path = find_reversed_path(pathlist[i])
+            if pathreq.bidir:
+                # only propagate if bidir is true, but needs the reversed path anyway for
+                # correct spectrum assignment
+                rev_p = deepcopy(reversed_path)
+
+                print(f'\n\tPropagating Z to A direction {pathreq.destination} to {pathreq.source}')
+                print(f'\tPath (roadsm) {[r.uid for r in rev_p if isinstance(r,Roadm)]}\n')
+                propagated_reversed_path = propagate(rev_p, pathreq, equipment)
+                temp_snr01nm = round(mean(propagated_reversed_path[-1].snr +\
+                                          lin2db(pathreq.baud_rate/(12.5e9))), 2)
+                if temp_snr01nm < pathreq.OSNR:
+                    msg = f'\tWarning! Request {pathreq.request_id} computed path from' +\
+                          f' {pathreq.source} to {pathreq.destination} does not pass with' +\
+                          f' {pathreq.tsp_mode}\n' +\
+                          f'\tcomputedSNR in 0.1nm = {temp_snr01nm} - required osnr {pathreq.OSNR}'
+                    print(msg)
+                    LOGGER.warning(msg)
+                    # TODO selection of mode should also be on reversed direction !!
+                    pathreq.blocking_reason = 'MODE_NOT_FEASIBLE'
+            else:
+                propagated_reversed_path = []
+        else:
+            msg = 'Total path is empty. No propagation'
+            print(msg)
+            LOGGER.info(msg)
+            reversed_path = []
+            propagated_reversed_path = []
+
+        path_res_list.append(total_path)
+        reversed_path_res_list.append(reversed_path)
+        propagated_reversed_path_res_list.append(propagated_reversed_path)
+        # print to have a nice output
+        print('')
+    return path_res_list, reversed_path_res_list, propagated_reversed_path_res_list
 
 def correct_route_list(network, pathreqlist):
-    # prepares the format of route list of nodes to be consistant
+    """ prepares the format of route list of nodes to be consistant
-    # remove wrong names, remove endpoints
+        remove wrong names, remove endpoints
-    # also correct source and destination
+        also correct source and destination
+    """
     anytype = [n.uid for n in network.nodes()]
-    # TODO there is a problem of identification of fibers in case of parallel fibers bitween two adjacent roadms
+    # TODO there is a problem of identification of fibers in case of parallel fibers
-    # so fiber constraint is not supported
+    # between two adjacent roadms so fiber constraint is not supported
     transponders = [n.uid for n in network.nodes() if isinstance(n, Transceiver)]
     for pathreq in pathreqlist:
-        for i,n_id in enumerate(pathreq.nodes_list):
+        for i, n_id in enumerate(pathreq.nodes_list):
             # replace possibly wrong name with a formated roadm name
             # print(n_id)
-            if n_id not in anytype :
+            if n_id not in anytype:
                 # find nodes name that include constraint among all possible names except
                 # transponders (not yet supported as constraints).
                 nodes_suggestion = [uid for uid in anytype \
                     if n_id.lower() in uid.lower() and uid not in transponders]
                 if pathreq.loose_list[i] == 'LOOSE':
-                    if len(nodes_suggestion)>0 :
+                    if len(nodes_suggestion) > 0:
                         new_n = nodes_suggestion[0]
                         print(f'invalid route node specified:\
                         \n\'{n_id}\', replaced with \'{new_n}\'')
                         pathreq.nodes_list[i] = new_n
                     else:
-                        print(f'\x1b[1;33;40m'+f'invalid route node specified \'{n_id}\', could not use it as constraint, skipped!'+'\x1b[0m')
+                        print(f'\x1b[1;33;40m'+f'invalid route node specified \'{n_id}\',' +\
+                              f' could not use it as constraint, skipped!'+'\x1b[0m')
                         pathreq.nodes_list.remove(n_id)
                         pathreq.loose_list.pop(i)
                 else:
-                    msg = f'\x1b[1;33;40m'+f'could not find node : {n_id} in network topology. Strict constraint can not be applied.'+'\x1b[0m'
+                    msg = f'\x1b[1;33;40m'+f'could not find node: {n_id} in network topology.' +\
-                    logger.critical(msg)
+                          f' Strict constraint can not be applied.' + '\x1b[0m'
+                    LOGGER.critical(msg)
                     raise ValueError(msg)
         if pathreq.source not in transponders:
-            msg = f'\x1b[1;31;40m'+f'Request: {pathreq.request_id}: could not find transponder source : {pathreq.source}.'+'\x1b[0m'
+            msg = f'\x1b[1;31;40m' + f'Request: {pathreq.request_id}: could not find' +\
-            logger.critical(msg)
+                  f' transponder source: {pathreq.source}.'+'\x1b[0m'
+            LOGGER.critical(msg)
             print(f'{msg}\nComputation stopped.')
-            exit()
+            raise ServiceError(msg)
 
         if pathreq.destination not in transponders:
-            msg = f'\x1b[1;31;40m'+f'Request: {pathreq.request_id}: could not find transponder destination : {pathreq.destination}.'+'\x1b[0m'
+            msg = f'\x1b[1;31;40m'+f'Request: {pathreq.request_id}: could not find' +\
-            logger.critical(msg)
+                  f' transponder destination: {pathreq.destination}.'+'\x1b[0m'
+            LOGGER.critical(msg)
             print(f'{msg}\nComputation stopped.')
-            exit()
+            raise ServiceError(msg)
 
-        # TODO remove endpoints from this list in case they were added by the user in the xls or json files
+        # TODO remove endpoints from this list in case they were added by the user
+        # in the xls or json files
     return pathreqlist
 
 def correct_disjn(disjn):
+    """ clean disjunctions to remove possible repetition
+    """
     local_disjn = disjn.copy()
-    for el in local_disjn:
+    for elem in local_disjn:
-        for d in local_disjn:
+        for dis_elem in local_disjn:
-            if set(el.disjunctions_req) == set(d.disjunctions_req) and\
+            if set(elem.disjunctions_req) == set(dis_elem.disjunctions_req) and\
-             el.disjunction_id != d.disjunction_id:
+             elem.disjunction_id != dis_elem.disjunction_id:
-                local_disjn.remove(d)
+                local_disjn.remove(dis_elem)
     return local_disjn
 
 
 def path_result_json(pathresult):
+    """ create the response dictionnary
+    """
     data = {
         'response': [n.json for n in pathresult]
     }
     return data
 
-
+def compute_requests(network, data, equipment):
-if __name__ == '__main__':
+    """ Main program calling functions
-    args = parser.parse_args()
+    """
-    basicConfig(level={2: DEBUG, 1: INFO, 0: CRITICAL}.get(args.verbose, DEBUG))
-    logger.info(f'Computing path requests {args.service_filename} into JSON format')
-    print('\x1b[1;34;40m'+f'Computing path requests {args.service_filename} into JSON format'+ '\x1b[0m')
-    # for debug
-    # print( args.eqpt_filename)
-    try:
-        data = load_requests(args.service_filename,args.eqpt_filename)
-        equipment = load_equipment(args.eqpt_filename)
-        network = load_network(args.network_filename,equipment)
-    except EquipmentConfigError as e:
-        print(f'{ansi_escapes.red}Configuration error in the equipment library:{ansi_escapes.reset} {e}')
-        exit(1)
-    except NetworkTopologyError as e:
-        print(f'{ansi_escapes.red}Invalid network definition:{ansi_escapes.reset} {e}')
-        exit(1)
-    except ConfigurationError as e:
-        print(f'{ansi_escapes.red}Configuration error:{ansi_escapes.reset} {e}')
-        exit(1)
-
     # Build the network once using the default power defined in SI in eqpt config
-    # TODO power density : db2linp(ower_dbm": 0)/power_dbm": 0 * nb channels as defined by
+    # TODO power density: db2linp(ower_dbm": 0)/power_dbm": 0 * nb channels as defined by
     # spacing, f_min and f_max
     p_db = equipment['SI']['default'].power_dbm
 
     p_total_db = p_db + lin2db(automatic_nch(equipment['SI']['default'].f_min,\
         equipment['SI']['default'].f_max, equipment['SI']['default'].spacing))
     build_network(network, equipment, p_db, p_total_db)
-    save_network(args.network_filename, network)
+    save_network(ARGS.network_filename, network)
 
-    rqs = requests_from_json(data, equipment)
+    oms_list = build_oms_list(network, equipment)
 
+    try:
+        rqs = requests_from_json(data, equipment)
+    except ServiceError as this_e:
+        print(f'{ansi_escapes.red}Service error:{ansi_escapes.reset} {this_e}')
+        raise this_e
     # check that request ids are unique. Non unique ids, may
-    # mess the computation : better to stop the computation
+    # mess the computation: better to stop the computation
     all_ids = [r.request_id for r in rqs]
     if len(all_ids) != len(set(all_ids)):
-        for a in list(set(all_ids)):
+        for item in list(set(all_ids)):
-            all_ids.remove(a)
+            all_ids.remove(item)
         msg = f'Requests id {all_ids} are not unique'
-        logger.critical(msg)
+        LOGGER.critical(msg)
-        exit()
+        raise ServiceError(msg)
-    rqs = correct_route_list(network, rqs)
+    try:
-
+        rqs = correct_route_list(network, rqs)
+    except ServiceError as this_e:
+        print(f'{ansi_escapes.red}Service error:{ansi_escapes.reset} {this_e}')
+        raise this_e
+        #exit(1)
     # pths = compute_path(network, equipment, rqs)
     dsjn = disjunctions_from_json(data)
 
-    print('\x1b[1;34;40m'+f'List of disjunctions'+ '\x1b[0m')
+    print('\x1b[1;34;40m' + f'List of disjunctions' + '\x1b[0m')
     print(dsjn)
     # need to warn or correct in case of wrong disjunction form
     # disjunction must not be repeated with same or different ids
     dsjn = correct_disjn(dsjn)
 
     # Aggregate demands with same exact constraints
-    print('\x1b[1;34;40m'+f'Aggregating similar requests'+ '\x1b[0m')
+    print('\x1b[1;34;40m' + f'Aggregating similar requests' + '\x1b[0m')
 
-    rqs,dsjn = requests_aggregation(rqs,dsjn)
+    rqs, dsjn = requests_aggregation(rqs, dsjn)
     # TODO export novel set of aggregated demands in a json file
 
-    print('\x1b[1;34;40m'+'The following services have been requested:'+ '\x1b[0m')
+    print('\x1b[1;34;40m' + 'The following services have been requested:' + '\x1b[0m')
     print(rqs)
 
-    print('\x1b[1;34;40m'+f'Computing all paths with constraints'+ '\x1b[0m')
+    print('\x1b[1;34;40m' + f'Computing all paths with constraints' + '\x1b[0m')
-    pths = compute_path_dsjctn(network, equipment, rqs, dsjn)
+    try:
+        pths = compute_path_dsjctn(network, equipment, rqs, dsjn)
+    except DisjunctionError as this_e:
+        print(f'{ansi_escapes.red}Disjunction error:{ansi_escapes.reset} {this_e}')
+        raise this_e
 
-    print('\x1b[1;34;40m'+f'Propagating on selected path'+ '\x1b[0m')
+    print('\x1b[1;34;40m' + f'Propagating on selected path' + '\x1b[0m')
-    propagatedpths = compute_path_with_disjunction(network, equipment, rqs, pths)
+    propagatedpths, reversed_pths, reversed_propagatedpths = \
+        compute_path_with_disjunction(network, equipment, rqs, pths)
+    # Note that deepcopy used in compute_path_with_disjunction returns
+    # a list of nodes which are not belonging to network (they are copies of the node objects).
+    # so there can not be propagation on these nodes.
+
+    pth_assign_spectrum(pths, rqs, oms_list, reversed_pths)
 
     print('\x1b[1;34;40m'+f'Result summary'+ '\x1b[0m')
-
+    header = ['req id', '  demand', '  snr@bandwidth A-Z (Z-A)', '  snr@0.1nm A-Z (Z-A)',\
-    header = ['req id', '  demand','  snr@bandwidth','  snr@0.1nm','  Receiver minOSNR', '  mode', '  Gbit/s' , '  nb of tsp pairs']
+              '  Receiver minOSNR', '  mode', '  Gbit/s', '  nb of tsp pairs',\
+              'N,M or blocking reason']
     data = []
     data.append(header)
-    for i, p in enumerate(propagatedpths):
+    for i, this_p in enumerate(propagatedpths):
-        if p:
+        rev_pth = reversed_propagatedpths[i]
-            line = [f'{rqs[i].request_id}', f' {rqs[i].source} to {rqs[i].destination} : ', f'{round(mean(p[-1].snr),2)}',\
+        if rev_pth and this_p:
-                f'{round(mean(p[-1].snr+lin2db(rqs[i].baud_rate/(12.5e9))),2)}',\
+            psnrb = f'{round(mean(this_p[-1].snr),2)} ({round(mean(rev_pth[-1].snr),2)})'
-                f'{rqs[i].OSNR}', f'{rqs[i].tsp_mode}' , f'{round(rqs[i].path_bandwidth * 1e-9,2)}' , f'{ceil(rqs[i].path_bandwidth / rqs[i].bit_rate) }']
+            psnr = f'{round(mean(this_p[-1].snr_01nm), 2)}' +\
-        else:
+                   f' ({round(mean(rev_pth[-1].snr_01nm),2)})'
-            line = [f'{rqs[i].request_id}',f' {rqs[i].source} to {rqs[i].destination} : not feasible ']
+        elif this_p:
+            psnrb = f'{round(mean(this_p[-1].snr),2)}'
+            psnr = f'{round(mean(this_p[-1].snr_01nm),2)}'
+
+        try :
+            if rqs[i].blocking_reason in  BLOCKING_NOPATH:
+                line = [f'{rqs[i].request_id}', f' {rqs[i].source} to {rqs[i].destination} :',\
+                        f'-', f'-', f'-', f'{rqs[i].tsp_mode}', f'{round(rqs[i].path_bandwidth * 1e-9,2)}',\
+                        f'-', f'{rqs[i].blocking_reason}']
+            else:
+                line = [f'{rqs[i].request_id}', f' {rqs[i].source} to {rqs[i].destination} : ', psnrb,\
+                        psnr, f'-', f'{rqs[i].tsp_mode}', f'{round(rqs[i].path_bandwidth * 1e-9, 2)}',\
+                        f'-', f'{rqs[i].blocking_reason}']
+        except AttributeError:
+            line = [f'{rqs[i].request_id}', f' {rqs[i].source} to {rqs[i].destination} : ', psnrb,\
+                    psnr, f'{rqs[i].OSNR}', f'{rqs[i].tsp_mode}', f'{round(rqs[i].path_bandwidth * 1e-9,2)}',\
+                    f'{ceil(rqs[i].path_bandwidth / rqs[i].bit_rate) }', f'({rqs[i].N},{rqs[i].M})']
         data.append(line)
 
     col_width = max(len(word) for row in data for word in row[2:])   # padding
-    firstcol_width = max(len(row[0]) for row in data )   # padding
+    firstcol_width = max(len(row[0]) for row in data)   # padding
-    secondcol_width = max(len(row[1]) for row in data )   # padding
+    secondcol_width = max(len(row[1]) for row in data)   # padding
     for row in data:
         firstcol = ''.join(row[0].ljust(firstcol_width))
         secondcol = ''.join(row[1].ljust(secondcol_width))
-        remainingcols = ''.join(word.center(col_width,' ') for word in row[2:])
+        remainingcols = ''.join(word.center(col_width, ' ') for word in row[2:])
         print(f'{firstcol} {secondcol} {remainingcols}')
+    print('\x1b[1;33;40m'+f'Result summary shows mean SNR and OSNR (average over all channels)' +\
+          '\x1b[0m')
+
+    return propagatedpths, reversed_propagatedpths, rqs
 
 
-    if args.output :
+def launch_cli(network, data, equipment):
+    """ Compute requests using network, data and equipment with client line interface
+    """
+    propagatedpths, reversed_propagatedpths, rqs = compute_requests(network, data, equipment)
+    #Generate the output
+    if ARGS.output :
         result = []
         # assumes that list of rqs and list of propgatedpths have same order
-        for i,p in enumerate(propagatedpths):
+        for i, pth in enumerate(propagatedpths):
-            result.append(Result_element(rqs[i],p))
+            result.append(Result_element(rqs[i], pth, reversed_propagatedpths[i]))
         temp = path_result_json(result)
-        fnamecsv = f'{str(args.output)[0:len(str(args.output))-len(str(args.output.suffix))]}.csv'
+        fnamecsv = f'{str(ARGS.output)[0:len(str(ARGS.output))-len(str(ARGS.output.suffix))]}.csv'
-        fnamejson = f'{str(args.output)[0:len(str(args.output))-len(str(args.output.suffix))]}.json'
+        fnamejson = f'{str(ARGS.output)[0:len(str(ARGS.output))-len(str(ARGS.output.suffix))]}.json'
-        with open(fnamejson, 'w', encoding='utf-8') as f:
+        with open(fnamejson, 'w', encoding='utf-8') as fjson:
-            f.write(dumps(path_result_json(result), indent=2, ensure_ascii=False))
+            fjson.write(dumps(path_result_json(result), indent=2, ensure_ascii=False))
-            with open(fnamecsv,"w", encoding='utf-8') as fcsv :
+            with open(fnamecsv, "w", encoding='utf-8') as fcsv:
-                jsontocsv(temp,equipment,fcsv)
+                jsontocsv(temp, equipment, fcsv)
-                print('\x1b[1;34;40m'+f'saving in {args.output} and {fnamecsv}'+ '\x1b[0m')
+                print('\x1b[1;34;40m'+f'saving in {ARGS.output} and {fnamecsv}'+ '\x1b[0m')
+
+class GnpyAPI(Resource):
+    """ Compute requests using network, data and equipment with rest api
+    """
+    def get(self):
+        return {"ping": True}, 200
+
+    def post(self):
+        data = request.get_json()
+        equipment = load_equipment('examples/2019-demo-equipment.json')
+        topo_json = load_json('examples/2019-demo-topology.json')
+        network = network_from_json(topo_json, equipment)
+        try:
+            propagatedpths, reversed_propagatedpths, rqs = compute_requests(network, data, equipment)
+            # Generate the output
+            result = []
+            #assumes that list of rqs and list of propgatedpths have same order
+            for i, pth in enumerate(propagatedpths):
+                result.append(Result_element(rqs[i], pth, reversed_propagatedpths[i]))
+
+            return {"result":path_result_json(result)}, 201
+        except ServiceError as this_e:
+            msg = f'Service error: {this_e}'
+            return {"result": msg}, 400
+
+API.add_resource(GnpyAPI, '/gnpy-experimental')
+
+def main(args):
+    """ main function that calls all functions
+    """
+    LOGGER.info(f'Computing path requests {args.service_filename} into JSON format')
+    print('\x1b[1;34;40m' +\
+          f'Computing path requests {args.service_filename} into JSON format'+ '\x1b[0m')
+    # for debug
+    # print( args.eqpt_filename)
+
+    try:
+        data = load_requests(args.service_filename, args.eqpt_filename, args.bidir)
+        equipment = load_equipment(args.eqpt_filename)
+        network = load_network(args.network_filename, equipment)
+    except EquipmentConfigError as this_e:
+        print(f'{ansi_escapes.red}Configuration error in the equipment library:{ansi_escapes.reset} {this_e}')
+        exit(1)
+    except NetworkTopologyError as this_e:
+        print(f'{ansi_escapes.red}Invalid network definition:{ansi_escapes.reset} {this_e}')
+        exit(1)
+    except ConfigurationError as this_e:
+        print(f'{ansi_escapes.red}Configuration error:{ansi_escapes.reset} {this_e}')
+        exit(1)
+    except ServiceError as this_e:
+        print(f'{ansi_escapes.red}Service error:{ansi_escapes.reset} {this_e}')
+        exit(1)
+    # input_str = raw_input("How will you use your program: c:[cli] , a:[api] ?")
+    # print(input_str)
+    #
+    if ((args.rest == 1) and (args.output is None)):
+        print('you have chosen the rest mode')
+        APP.run(host='0.0.0.0', port=5000, debug=True)
+    elif ((args.rest > 1) or ((args.rest == 1) and (args.output is not None))):
+        print('command is not well formulated')
+    else:
+        launch_cli(network, data, equipment)
+
+if __name__ == '__main__':
+    ARGS = PARSER.parse_args()
+    basicConfig(level={2: DEBUG, 1: INFO, 0: CRITICAL}.get(ARGS.verbose, DEBUG))
+    main(ARGS)

examples/serviceDemov1.json

@@ -0,0 +1,180 @@
+{
+  "path-request": [
+    {
+      "request-id": "0",
+      "source": "trx site_a",
+      "destination": "trx site_b",
+      "src-tp-id": "trx site_a",
+      "dst-tp-id": "trx site_b",
+      "bidirectional": false,
+      "path-constraints": {
+        "te-bandwidth": {
+          "technology": "flexi-grid",
+          "trx_type": "Voyager",
+          "trx_mode": null,
+          "effective-freq-slot": [
+            {
+              "N": "null",
+              "M": "null"
+            }
+          ],
+          "spacing": 50000000000.0,
+          "max-nb-of-channel": null,
+          "output-power": null,
+          "path_bandwidth": 100000000000.0
+        }
+      }
+    },
+    {
+      "request-id": "1",
+      "source": "trx site_a",
+      "destination": "trx site_b",
+      "src-tp-id": "trx site_a",
+      "dst-tp-id": "trx site_b",
+      "bidirectional": false,
+      "path-constraints": {
+        "te-bandwidth": {
+          "technology": "flexi-grid",
+          "trx_type": "Voyager",
+          "trx_mode": "mode 1",
+          "effective-freq-slot": [
+            {
+              "N": "null",
+              "M": "null"
+            }
+          ],
+          "spacing": 50000000000.0,
+          "max-nb-of-channel": null,
+          "output-power": null,
+          "path_bandwidth": 200000000000.0
+        }
+      },
+      "explicit-route-objects": {
+        "route-object-include-exclude": [
+          {
+            "explicit-route-usage": "route-include-ero",
+            "index": 0,
+            "num-unnum-hop": {
+              "node-id": "Span1ab",
+              "link-tp-id": "link-tp-id is not used",
+              "hop-type": "STRICT"
+            }
+          }
+        ]
+      }
+    },
+    {
+      "request-id": "2",
+      "source": "trx site_a",
+      "destination": "trx site_b",
+      "src-tp-id": "trx site_a",
+      "dst-tp-id": "trx site_b",
+      "bidirectional": false,
+      "path-constraints": {
+        "te-bandwidth": {
+          "technology": "flexi-grid",
+          "trx_type": "Voyager",
+          "trx_mode": "mode 1",
+          "effective-freq-slot": [
+            {
+              "N": "null",
+              "M": "null"
+            }
+          ],
+          "spacing": 50000000000.0,
+          "max-nb-of-channel": null,
+          "output-power": null,
+          "path_bandwidth": 200000000000.0
+        }
+      },
+      "explicit-route-objects": {
+        "route-object-include-exclude": [
+          {
+            "explicit-route-usage": "route-include-ero",
+            "index": 0,
+            "num-unnum-hop": {
+              "node-id": "roadm site_c",
+              "link-tp-id": "link-tp-id is not used",
+              "hop-type": "STRICT"
+            }
+          }
+        ]
+      }
+    },
+    {
+      "request-id": "3",
+      "source": "trx site_a",
+      "destination": "trx site_b",
+      "src-tp-id": "trx site_a",
+      "dst-tp-id": "trx site_b",
+      "bidirectional": false,
+      "path-constraints": {
+        "te-bandwidth": {
+          "technology": "flexi-grid",
+          "trx_type": "Voyager",
+          "trx_mode": null,
+          "effective-freq-slot": [
+            {
+              "N": "null",
+              "M": "null"
+            }
+          ],
+          "spacing": 50000000000.0,
+          "max-nb-of-channel": null,
+          "output-power": null,
+          "path_bandwidth": 100000000000.0
+        }
+      }
+    },
+    {
+      "request-id": "4",
+      "source": "trx site_a",
+      "destination": "trx site_b",
+      "src-tp-id": "trx site_a",
+      "dst-tp-id": "trx site_b",
+      "bidirectional": false,
+      "path-constraints": {
+        "te-bandwidth": {
+          "technology": "flexi-grid",
+          "trx_type": "Voyager",
+          "trx_mode": null,
+          "effective-freq-slot": [
+            {
+              "N": "null",
+              "M": "null"
+            }
+          ],
+          "spacing": 50000000000.0,
+          "max-nb-of-channel": null,
+          "output-power": null,
+          "path_bandwidth": 100000000000.0
+        }
+      }
+    }
+  ],
+  "synchronization": [
+    {
+      "synchronization-id": "x",
+      "svec": {
+        "relaxable": "false",
+        "disjointness": "node link",
+        "request-id-number": [
+          "3",
+          "0"
+        ]
+      }
+    },
+    {
+      "synchronization-id": "y",
+      "svec": {
+        "relaxable": "false",
+        "disjointness": "node link",
+        "request-id-number": [
+          "4",
+          "3",
+          "0"
+        ]
+      }
+    }
+  ]
+}

examples/topoDemov1.json

@@ -0,0 +1,703 @@
+{
+  "elements": [
+    {
+      "uid": "trx site_a",
+      "type": "Transceiver",
+      "metadata": {
+        "location": {
+          "latitude": 0,
+          "longitude": 0,
+          "city": "Site a",
+          "region": ""
+        }
+      }
+    },
+    {
+      "uid": "roadm site_a",
+      "type": "Roadm",
+      "params": {
+        "target_pch_out_db": -20,
+        "restrictions": {
+          "preamp_variety_list": [],
+          "booster_variety_list": []
+        }
+      },
+      "metadata": {
+        "location": {
+          "latitude": 0,
+          "longitude": 0,
+          "city": "Site a",
+          "region": ""
+        }
+      }
+    },
+    {
+      "uid": "Span1ab",
+      "type": "Fiber",
+      "type_variety": "SSMF",
+      "params": {
+        "type_variety": "SSMF",
+        "length": 100.0,
+        "loss_coef": 0.2,
+        "length_units": "km",
+        "att_in": 0,
+        "con_in": 0.5,
+        "con_out": 0.5
+      },
+      "metadata": {
+        "location": {
+          "latitude": 1,
+          "longitude": 0,
+          "city": null,
+          "region": ""
+        }
+      }
+    },
+    {
+      "uid": "Span1ba",
+      "type": "Fiber",
+      "type_variety": "SSMF",
+      "params": {
+        "type_variety": "SSMF",
+        "length": 100.0,
+        "loss_coef": 0.2,
+        "length_units": "km",
+        "att_in": 0,
+        "con_in": 0.5,
+        "con_out": 0.5
+      },
+      "metadata": {
+        "location": {
+          "latitude": 1,
+          "longitude": 0,
+          "city": null,
+          "region": ""
+        }
+      }
+    },
+    {
+      "uid": "Span2ab",
+      "type": "Fiber",
+      "type_variety": "SSMF",
+      "params": {
+        "type_variety": "SSMF",
+        "length": 80.0,
+        "loss_coef": 0.2,
+        "length_units": "km",
+        "att_in": 0,
+        "con_in": 0.5,
+        "con_out": 0.5
+      },
+      "metadata": {
+        "location": {
+          "latitude": 1,
+          "longitude": 0,
+          "city": null,
+          "region": ""
+        }
+      }
+    },
+    {
+      "uid": "Span2ba",
+      "type": "Fiber",
+      "type_variety": "SSMF",
+      "params": {
+        "type_variety": "SSMF",
+        "length": 80.0,
+        "loss_coef": 0.2,
+        "length_units": "km",
+        "att_in": 0,
+        "con_in": 0.5,
+        "con_out": 0.5
+      },
+      "metadata": {
+        "location": {
+          "latitude": 1,
+          "longitude": 0,
+          "city": null,
+          "region": ""
+        }
+      }
+    },
+    {
+      "uid": "roadm site_b",
+      "type": "Roadm",
+      "params": {
+        "target_pch_out_db": -20,
+        "restrictions": {
+          "preamp_variety_list": [],
+          "booster_variety_list": []
+        }
+      },
+      "metadata": {
+        "location": {
+          "latitude": 0,
+          "longitude": 0,
+          "city": "Site b",
+          "region": ""
+        }
+      }
+    },
+    {
+      "uid": "trx site_b",
+      "type": "Transceiver",
+      "metadata": {
+        "location": {
+          "latitude": 2,
+          "longitude": 0,
+          "city": "Site b",
+          "region": ""
+        }
+      }
+    },
+    {
+      "uid": "booster1 site_a",
+      "type": "Edfa",
+      "type_variety": "std_medium_gain",
+      "operational": {
+        "gain_target": 19.0,
+        "delta_p": -1.0,
+        "tilt_target": 0,
+        "out_voa": 0
+      },
+      "metadata": {
+        "location": {
+          "latitude": 0.5,
+          "longitude": 0.0,
+          "city": "Site a",
+          "region": ""
+        }
+      }
+    },
+    {
+      "uid": "preamp site_b",
+      "type": "Edfa",
+      "type_variety": "std_low_gain",
+      "operational": {
+        "gain_target": 18.0,
+        "delta_p": 0,
+        "tilt_target": 0,
+        "out_voa": 0
+      },
+      "metadata": {
+        "location": {
+          "latitude": 0.5,
+          "longitude": 0.0,
+          "city": "Site b",
+          "region": ""
+        }
+      }
+    },
+    {
+      "uid": "booster1 site_b",
+      "type": "Edfa",
+      "type_variety": "std_medium_gain",
+      "operational": {
+        "gain_target": 19.0,
+        "delta_p": -1.0,
+        "tilt_target": 0,
+        "out_voa": 0
+      },
+      "metadata": {
+        "location": {
+          "latitude": 0.5,
+          "longitude": 0.0,
+          "city": "Site b",
+          "region": ""
+        }
+      }
+    },
+    {
+      "uid": "preamp1 site_a",
+      "type": "Edfa",
+      "type_variety": "std_low_gain",
+      "operational": {
+        "gain_target": 18.0,
+        "delta_p": 0,
+        "tilt_target": 0,
+        "out_voa": 0
+      },
+      "metadata": {
+        "location": {
+          "latitude": 0.5,
+          "longitude": 0.0,
+          "city": "Site_a",
+          "region": ""
+        }
+      }
+    },
+    {
+      "uid": "booster2 site_a",
+      "type": "Edfa",
+      "type_variety": "std_medium_gain",
+      "operational": {
+        "gain_target": 19.0,
+        "delta_p": -1.0,
+        "tilt_target": 0,
+        "out_voa": 0
+      },
+      "metadata": {
+        "location": {
+          "latitude": 0.5,
+          "longitude": 0.0,
+          "city": "Site a",
+          "region": ""
+        }
+      }
+    },
+    {
+      "uid": "preamp2 site_b",
+      "type": "Edfa",
+      "type_variety": "std_low_gain",
+      "operational": {
+        "gain_target": 18.0,
+        "delta_p": 0,
+        "tilt_target": 0,
+        "out_voa": 0
+      },
+      "metadata": {
+        "location": {
+          "latitude": 0.5,
+          "longitude": 0.0,
+          "city": "Site_b",
+          "region": ""
+        }
+      }
+    },
+    {
+      "uid": "booster2 site_b",
+      "type": "Edfa",
+      "type_variety": "std_medium_gain",
+      "operational": {
+        "gain_target": 19.0,
+        "delta_p": -1.0,
+        "tilt_target": 0,
+        "out_voa": 0
+      },
+      "metadata": {
+        "location": {
+          "latitude": 0.5,
+          "longitude": 0.0,
+          "city": "Site b",
+          "region": ""
+        }
+      }
+    },
+    {
+      "uid": "preamp2 site_a",
+      "type": "Edfa",
+      "type_variety": "std_low_gain",
+      "operational": {
+        "gain_target": 18.0,
+        "delta_p": 0,
+        "tilt_target": 0,
+        "out_voa": 0
+      },
+      "metadata": {
+        "location": {
+          "latitude": 0.5,
+          "longitude": 0.0,
+          "city": "Site_a",
+          "region": ""
+        }
+      }
+    },
+    {
+      "uid": "booster3 site_a",
+      "type": "Edfa",
+      "type_variety": "std_medium_gain",
+      "operational": {
+        "gain_target": 19.0,
+        "delta_p": -1.0,
+        "tilt_target": 0,
+        "out_voa": 0
+      },
+      "metadata": {
+        "location": {
+          "latitude": 0.5,
+          "longitude": 0.0,
+          "city": "Site a",
+          "region": ""
+        }
+      }
+    },
+    {
+      "uid": "preamp3 site_b",
+      "type": "Edfa",
+      "type_variety": "std_low_gain",
+      "operational": {
+        "gain_target": 18.0,
+        "delta_p": 0,
+        "tilt_target": 0,
+        "out_voa": 0
+      },
+      "metadata": {
+        "location": {
+          "latitude": 0.5,
+          "longitude": 0.0,
+          "city": "Site_b",
+          "region": ""
+        }
+      }
+    },
+    {
+      "uid": "booster3 site_b",
+      "type": "Edfa",
+      "type_variety": "std_medium_gain",
+      "operational": {
+        "gain_target": 19.0,
+        "delta_p": -1.0,
+        "tilt_target": 0,
+        "out_voa": 0
+      },
+      "metadata": {
+        "location": {
+          "latitude": 0.5,
+          "longitude": 0.0,
+          "city": "Site b",
+          "region": ""
+        }
+      }
+    },
+    {
+      "uid": "preamp3 site_a",
+      "type": "Edfa",
+      "type_variety": "std_low_gain",
+      "operational": {
+        "gain_target": 18.0,
+        "delta_p": 0,
+        "tilt_target": 0,
+        "out_voa": 0
+      },
+      "metadata": {
+        "location": {
+          "latitude": 0.5,
+          "longitude": 0.0,
+          "city": "Site_a",
+          "region": ""
+        }
+      }
+    },
+    {
+      "uid": "roadm site_c",
+      "type": "Roadm",
+      "params": {
+        "target_pch_out_db": -20,
+        "restrictions": {
+          "preamp_variety_list": [],
+          "booster_variety_list": []
+        }
+      },
+      "metadata": {
+        "location": {
+          "latitude": 0,
+          "longitude": 0,
+          "city": "Site c",
+          "region": ""
+        }
+      }
+    },
+    {
+      "uid": "booster1 site_c",
+      "type": "Edfa",
+      "type_variety": "std_medium_gain",
+      "operational": {
+        "gain_target": 19.0,
+        "delta_p": -1.0,
+        "tilt_target": 0,
+        "out_voa": 0
+      },
+      "metadata": {
+        "location": {
+          "latitude": 0.5,
+          "longitude": 0.0,
+          "city": "Site c",
+          "region": ""
+        }
+      }
+    },
+    {
+      "uid": "preamp1 site_c",
+      "type": "Edfa",
+      "type_variety": "std_low_gain",
+      "operational": {
+        "gain_target": 18.0,
+        "delta_p": 0,
+        "tilt_target": 0,
+        "out_voa": 0
+      },
+      "metadata": {
+        "location": {
+          "latitude": 0.5,
+          "longitude": 0.0,
+          "city": "Site_c",
+          "region": ""
+        }
+      }
+    },
+    {
+      "uid": "booster2 site_c",
+      "type": "Edfa",
+      "type_variety": "std_medium_gain",
+      "operational": {
+        "gain_target": 19.0,
+        "delta_p": -1.0,
+        "tilt_target": 0,
+        "out_voa": 0
+      },
+      "metadata": {
+        "location": {
+          "latitude": 0.5,
+          "longitude": 0.0,
+          "city": "Site c",
+          "region": ""
+        }
+      }
+    },
+    {
+      "uid": "preamp2 site_c",
+      "type": "Edfa",
+      "type_variety": "std_low_gain",
+      "operational": {
+        "gain_target": 18.0,
+        "delta_p": 0,
+        "tilt_target": 0,
+        "out_voa": 0
+      },
+      "metadata": {
+        "location": {
+          "latitude": 0.5,
+          "longitude": 0.0,
+          "city": "Site_c",
+          "region": ""
+        }
+      }
+    },
+    {
+      "uid": "Span1ac",
+      "type": "Fiber",
+      "type_variety": "SSMF",
+      "params": {
+        "type_variety": "SSMF",
+        "length": 80.0,
+        "loss_coef": 0.2,
+        "length_units": "km",
+        "att_in": 0,
+        "con_in": 0.5,
+        "con_out": 0.5
+      },
+      "metadata": {
+        "location": {
+          "latitude": 1,
+          "longitude": 0,
+          "city": null,
+          "region": ""
+        }
+      }
+    },
+    {
+      "uid": "Span1ca",
+      "type": "Fiber",
+      "type_variety": "SSMF",
+      "params": {
+        "type_variety": "SSMF",
+        "length": 80.0,
+        "loss_coef": 0.2,
+        "length_units": "km",
+        "att_in": 0,
+        "con_in": 0.5,
+        "con_out": 0.5
+      },
+      "metadata": {
+        "location": {
+          "latitude": 1,
+          "longitude": 0,
+          "city": null,
+          "region": ""
+        }
+      }
+    },
+    {
+      "uid": "Span1bc",
+      "type": "Fiber",
+      "type_variety": "SSMF",
+      "params": {
+        "type_variety": "SSMF",
+        "length": 80.0,
+        "loss_coef": 0.2,
+        "length_units": "km",
+        "att_in": 0,
+        "con_in": 0.5,
+        "con_out": 0.5
+      },
+      "metadata": {
+        "location": {
+          "latitude": 1,
+          "longitude": 0,
+          "city": null,
+          "region": ""
+        }
+      }
+    },
+    {
+      "uid": "Span1cb",
+      "type": "Fiber",
+      "type_variety": "SSMF",
+      "params": {
+        "type_variety": "SSMF",
+        "length": 80.0,
+        "loss_coef": 0.2,
+        "length_units": "km",
+        "att_in": 0,
+        "con_in": 0.5,
+        "con_out": 0.5
+      },
+      "metadata": {
+        "location": {
+          "latitude": 1,
+          "longitude": 0,
+          "city": null,
+          "region": ""
+        }
+      }
+    }
+  ],
+  "connections": [
+    {
+      "from_node": "trx site_a",
+      "to_node": "roadm site_a"
+    },
+    {
+      "from_node": "roadm site_a",
+      "to_node": "booster1 site_a"
+    },
+    {
+      "from_node": "booster1 site_a",
+      "to_node": "Span1ab"
+    },
+    {
+      "from_node": "Span1ab",
+      "to_node": "preamp site_b"
+    },
+    {
+      "from_node": "preamp site_b",
+      "to_node": "roadm site_b"
+    },
+    {
+      "from_node": "roadm site_b",
+      "to_node": "trx site_b"
+    },
+    {
+      "from_node": "roadm site_a",
+      "to_node": "booster2 site_a"
+    },
+    {
+      "from_node": "booster2 site_a",
+      "to_node": "Span2ab"
+    },
+    {
+      "from_node": "Span2ab",
+      "to_node": "preamp2 site_b"
+    },
+    {
+      "from_node": "preamp2 site_b",
+      "to_node": "roadm site_b"
+    },
+    {
+      "from_node": "roadm site_b",
+      "to_node": "booster1 site_b"
+    },
+    {
+      "from_node": "booster1 site_b",
+      "to_node": "Span1ba"
+    },
+    {
+      "from_node": "Span1ba",
+      "to_node": "preamp1 site_a"
+    },
+    {
+      "from_node": "preamp1 site_a",
+      "to_node": "roadm site_a"
+    },
+    {
+      "from_node": "roadm site_b",
+      "to_node": "booster2 site_b"
+    },
+    {
+      "from_node": "booster2 site_b",
+      "to_node": "Span2ba"
+    },
+    {
+      "from_node": "Span2ba",
+      "to_node": "preamp2 site_a"
+    },
+    {
+      "from_node": "preamp2 site_a",
+      "to_node": "roadm site_a"
+    },
+    {
+      "from_node": "roadm site_a",
+      "to_node": "booster3 site_a"
+    },
+    {
+      "from_node": "booster3 site_a",
+      "to_node": "Span1ac"
+    },
+    {
+      "from_node": "Span1ac",
+      "to_node": "preamp1 site_c"
+    },
+    {
+      "from_node": "preamp1 site_c",
+      "to_node": "roadm site_c"
+    },
+    {
+      "from_node": "roadm site_c",
+      "to_node": "booster1 site_c"
+    },
+    {
+      "from_node": "booster1 site_c",
+      "to_node": "Span1cb"
+    },
+    {
+      "from_node": "Span1cb",
+      "to_node": "preamp3 site_b"
+    },
+    {
+      "from_node": "preamp3 site_b",
+      "to_node": "roadm site_b"
+    },
+    {
+      "from_node": "roadm site_b",
+      "to_node": "booster3 site_b"
+    },
+    {
+      "from_node": "booster3 site_b",
+      "to_node": "Span1bc"
+    },
+    {
+      "from_node": "Span1bc",
+      "to_node": "preamp2 site_c"
+    },
+    {
+      "from_node": "preamp2 site_c",
+      "to_node": "roadm site_c"
+    },
+    {
+      "from_node": "roadm site_c",
+      "to_node": "booster2 site_c"
+    },
+    {
+      "from_node": "booster2 site_c",
+      "to_node": "Span1ca"
+    },
+    {
+      "from_node": "Span1ca",
+      "to_node": "preamp3 site_a"
+    },
+    {
+      "from_node": "preamp3 site_a",
+      "to_node": "roadm site_a"
+    }
+  ]
+}

examples/transmission_main_example.py

@@ -282,6 +282,7 @@ if __name__ == '__main__':
     params['trx_mode'] = ''
     params['source'] = source.uid
     params['destination'] = destination.uid
+    params['bidir'] = False
     params['nodes_list'] = [destination.uid]
     params['loose_list'] = ['strict']
     params['format'] = ''

gnpy/core/convert.py

@@ -32,6 +32,7 @@ from json import dumps
 from pathlib import Path
 from difflib import get_close_matches
 from gnpy.core.utils import silent_remove
+from gnpy.core.exceptions import NetworkTopologyError
 import time
 
 all_rows = lambda sh, start=0: (sh.row(x) for x in range(start, sh.nrows))
@@ -509,9 +510,12 @@ def parse_excel(input_filename):
     all_cities = Counter(n.city for n in nodes)
     if len(all_cities) != len(nodes):
         raise ValueError(f'Duplicate city: {all_cities}')
-    if any(ln.from_city not in all_cities or
+    bad_links = []
-           ln.to_city   not in all_cities for ln in links):
+    for lnk in links:
-        raise ValueError(f'Bad link.')
+        if lnk.from_city not in all_cities or lnk.to_city not in all_cities:
+            bad_links.append([lnk.from_city, lnk.to_city])
+    if bad_links:
+        raise NetworkTopologyError(f'Bad link(s): {bad_links}.')
 
     return nodes, links, eqpts
 

gnpy/core/elements.py

@@ -118,16 +118,19 @@ class Transceiver(Node):
         self._calc_snr(spectral_info)
         return spectral_info
 
-RoadmParams = namedtuple('RoadmParams', 'target_pch_out_db add_drop_osnr restrictions')
+RoadmParams = namedtuple('RoadmParams', 'target_pch_out_db add_drop_osnr restrictions per_degree_target_pch_out_db')
 
 class Roadm(Node):
     def __init__(self, *args, params, **kwargs):
+        if 'per_degree_target_pch_out_db' not in params.keys():
+            params['per_degree_target_pch_out_db'] = []
         super().__init__(*args, params=RoadmParams(**params), **kwargs)
         self.loss = 0 #auto-design interest
         self.effective_loss = None
         self.effective_pch_out_db = self.params.target_pch_out_db
         self.passive = True
         self.restrictions = self.params.restrictions
+        self.per_degree_target_pch_out_db = self.params.per_degree_target_pch_out_db
 
     @property
     def to_json(self):
@@ -135,7 +138,8 @@ class Roadm(Node):
                 'type'      : type(self).__name__,
                 'params'    : {
                     'target_pch_out_db' : self.effective_pch_out_db,
-                    'restrictions'      : self.restrictions
+                    'restrictions'      : self.restrictions,
+                    'per_degree_target_pch_out_db': self.per_degree_target_pch_out_db
                     },
                 'metadata'      : {
                     'location': self.metadata['location']._asdict()
@@ -150,15 +154,26 @@ class Roadm(Node):
                           f'  effective loss (dB):  {self.effective_loss:.2f}',
                           f'  pch out (dBm):        {self.effective_pch_out_db!r}'])
 
-    def propagate(self, pref, *carriers):
+    def propagate(self, pref, *carriers, degree):
         #pin_target and loss are read from eqpt_config.json['Roadm']
         #all ingress channels in xpress are set to this power level
         #but add channels are not, so we define an effective loss
         #in the case of add channels
-        self.effective_pch_out_db = min(pref.p_spani, self.params.target_pch_out_db)
+        if self.per_degree_target_pch_out_db:
+            # find the target power on this degree
+            try:
+                temp = next(el['target_pch_out_db'] \
+                    for el in self.per_degree_target_pch_out_db if el['to_node']==degree)
+            except StopIteration:
+                # if no target power is defined on this degree use the global one
+                temp = self.params.target_pch_out_db
+        else:
+            # if no per degree target power are defined, use the global one
+            temp = self.params.target_pch_out_db
+        self.effective_pch_out_db = min(pref.p_spani, temp)
         self.effective_loss = pref.p_spani - self.effective_pch_out_db
         carriers_power = array([c.power.signal +c.power.nli+c.power.ase for c in carriers])
-        carriers_att = list(map(lambda x : lin2db(x*1e3)-self.params.target_pch_out_db, carriers_power))
+        carriers_att = list(map(lambda x : lin2db(x*1e3)-self.effective_pch_out_db, carriers_power))
         exceeding_att = -min(list(filter(lambda x: x < 0, carriers_att)), default = 0)
         carriers_att = list(map(lambda x: db2lin(x+exceeding_att), carriers_att))
         for carrier_att, carrier in zip(carriers_att, carriers) :
@@ -171,8 +186,8 @@ class Roadm(Node):
     def update_pref(self, pref):
         return pref._replace(p_span0=pref.p_span0, p_spani=self.effective_pch_out_db)
 
-    def __call__(self, spectral_info):
+    def __call__(self, spectral_info, degree):
-        carriers = tuple(self.propagate(spectral_info.pref, *spectral_info.carriers))
+        carriers = tuple(self.propagate(spectral_info.pref, *spectral_info.carriers, degree=degree))
         pref = self.update_pref(spectral_info.pref)
         return spectral_info._replace(carriers=carriers, pref=pref)
 

gnpy/core/exceptions.py

@@ -17,3 +17,13 @@ class EquipmentConfigError(ConfigurationError):
 
 class NetworkTopologyError(ConfigurationError):
     '''Topology of user-provided network is wrong'''
+
+class ServiceError(Exception):
+    '''Service of user-provided request is wrong'''
+
+class DisjunctionError(ServiceError):
+    '''Disjunction of user-provided request can not be satisfied'''
+
+class SpectrumError(Exception):
+    '''Spectrum errors of the program'''
+

gnpy/core/network.py

@@ -233,7 +233,7 @@ def prev_node_generator(network, node):
     except StopIteration:
         raise NetworkTopologyError(f'Node {node.uid} is not properly connected, please check network topology')
     # yield and re-iterate
-    if isinstance(prev_node, Fused) or isinstance(node, Fused):
+    if isinstance(prev_node, Fused) or isinstance(node, Fused) and not isinstance(prev_node, Roadm):
         yield prev_node
         yield from prev_node_generator(network, prev_node)
     else:
@@ -247,7 +247,7 @@ def next_node_generator(network, node):
     except StopIteration:
         raise NetworkTopologyError('Node {node.uid} is not properly connected, please check network topology')
     # yield and re-iterate
-    if isinstance(next_node, Fused) or isinstance(node, Fused):
+    if isinstance(next_node, Fused) or isinstance(node, Fused) and not isinstance(next_node, Roadm):
         yield next_node
         yield from next_node_generator(network, next_node)
     else:
@@ -315,7 +315,18 @@ def set_egress_amplifier(network, roadm, equipment, pref_total_db):
         #     node = find_last_node(next_node)
         #     next_node = next(n for n in network.successors(node))
         #     next_node = find_last_node(next_node)
-        prev_dp = getattr(node.params, 'target_pch_out_db', 0)
+        
+        if node.per_degree_target_pch_out_db:
+            # find the target power on this degree
+            try:
+                prev_dp = next(el["target_pch_out_db"] for el in \
+                    node.per_degree_target_pch_out_db if el["to_node"]==next_node.uid)
+            except StopIteration:
+                # if no target power is defined on this degree use the global one
+                prev_dp = getattr(node.params, 'target_pch_out_db', 0)
+        else:
+            # if no per degree target power is given use the global one
+            prev_dp = getattr(node.params, 'target_pch_out_db', 0)
         dp = prev_dp
         prev_voa = 0
         voa = 0

gnpy/core/service_sheet.py

@@ -22,6 +22,7 @@ from json import dumps
 from pathlib import Path
 from gnpy.core.equipment import load_equipment
 from gnpy.core.utils import db2lin, lin2db
+from gnpy.core.exceptions import ServiceError
 
 SERVICES_COLUMN = 12
 #EQPT_LIBRARY_FILENAME = Path(__file__).parent / 'eqpt_config.json'
@@ -43,7 +44,7 @@ class Element:
         return hash((type(self), self.uid))
 
 class Request_element(Element):
-    def __init__(self,Request,eqpt_filename):
+    def __init__(self, Request, eqpt_filename, bidir):
         # request_id is str
         # excel has automatic number formatting that adds .0 on integer values
         # the next lines recover the pure int value, assuming this .0 is unwanted
@@ -54,6 +55,7 @@ class Request_element(Element):
         # be a string starting with 'trx' : this is manually added here.
         self.srctpid = f'trx {Request.source}'
         self.dsttpid = f'trx {Request.destination}'
+        self.bidir = bidir
         # test that trx_type belongs to eqpt_config.json
         # if not replace it with a default
         equipment = load_equipment(eqpt_filename)
@@ -76,14 +78,14 @@ class Request_element(Element):
             msg = f'Request Id: {self.request_id} - could not find tsp : \'{Request.trx_type}\' with mode: \'{Request.mode}\' in eqpt library \nComputation stopped.'
             #print(msg)
             logger.critical(msg)
-            exit()
+            raise ServiceError(msg)
         # excel input are in GHz and dBm
         if Request.spacing is not None:
             self.spacing = Request.spacing * 1e9
         else:
             msg = f'Request {self.request_id} missing spacing: spacing is mandatory.\ncomputation stopped'
             logger.critical(msg)
-            exit()
+            raise ServiceError(msg)
         if Request.power is not None:
             self.power =  db2lin(Request.power) * 1e-3
         else:
@@ -132,13 +134,14 @@ class Request_element(Element):
     uid = property(lambda self: repr(self))
     @property
     def pathrequest(self):
-
+        # Default assumption for bidir is False
         req_dictionnary = {
                     'request-id':self.request_id,
                     'source':    self.source,
                     'destination':  self.destination,
                     'src-tp-id': self.srctpid,
                     'dst-tp-id': self.dsttpid,
+                    'bidirectional': self.bidir,
                     'path-constraints':{
                         'te-bandwidth': {
                             'technology': 'flexi-grid',
@@ -187,9 +190,13 @@ class Request_element(Element):
     def json(self):
         return self.pathrequest , self.pathsync
 
-def convert_service_sheet(input_filename, eqpt_filename, output_filename='', filter_region=[]):
+def convert_service_sheet(input_filename, eqpt_filename, output_filename='', bidir=False, filter_region=None):
+    """ converts a service sheet into a json structure
+    """
+    if filter_region is None:
+        filter_region = []
     service = parse_excel(input_filename)
-    req = [Request_element(n,eqpt_filename) for n in service]
+    req = [Request_element(n, eqpt_filename, bidir) for n in service]
     # dumps the output into a json file with name
     # split_filename = [input_filename[0:len(input_filename)-len(suffix_filename)] , suffix_filename[1:]]
     if output_filename=='':
@@ -208,7 +215,7 @@ def convert_service_sheet(input_filename, eqpt_filename, output_filename='', fil
             'path-request': [n.json[0] for n in req]
             }
     with open(output_filename, 'w', encoding='utf-8') as f:
-            f.write(dumps(data, indent=2, ensure_ascii=False))
+        f.write(dumps(data, indent=2, ensure_ascii=False))
     return data
 
 def correct_xlrd_int_to_str_reading(v) :
@@ -233,25 +240,29 @@ def parse_excel(input_filename):
     return services
 
 def parse_service_sheet(service_sheet):
-        logger.info(f'Validating headers on {service_sheet.name!r}')
+    """ reads each column according to authorized fieldnames. order is not important.
-        # add a test on field to enable the '' field case that arises when columns on the 
+    """
-        # right hand side are used as comments or drawing in the excel sheet
+    logger.info(f'Validating headers on {service_sheet.name!r}')
-        header = [x.value.strip() for x in service_sheet.row(4)[0:SERVICES_COLUMN] if len(x.value.strip())>0]
+    # add a test on field to enable the '' field case that arises when columns on the
+    # right hand side are used as comments or drawing in the excel sheet
+    header = [x.value.strip() for x in service_sheet.row(4)[0:SERVICES_COLUMN]
+                if len(x.value.strip()) > 0]
 
-        # create a service_fieldname independant from the excel column order
+    # create a service_fieldname independant from the excel column order
-        # to be compatible with any version of the sheet
+    # to be compatible with any version of the sheet
-        # the following dictionnary records the excel field names and the corresponding parameter's name
+    # the following dictionnary records the excel field names and the corresponding parameter's name
 
-        authorized_fieldnames = {'route id':'request_id', 'Source':'source', 'Destination':'destination', \
+    authorized_fieldnames = {
-         'TRX type':'trx_type', 'Mode' : 'mode', 'System: spacing':'spacing', \
+        'route id':'request_id', 'Source':'source', 'Destination':'destination', \
-         'System: input power (dBm)':'power', 'System: nb of channels':'nb_channel',\
+        'TRX type':'trx_type', 'Mode' : 'mode', 'System: spacing':'spacing', \
-         'routing: disjoint from': 'disjoint_from', 'routing: path':'nodes_list',\
+        'System: input power (dBm)':'power', 'System: nb of channels':'nb_channel',\
-         'routing: is loose?':'is_loose', 'path bandwidth':'path_bandwidth'}
+        'routing: disjoint from': 'disjoint_from', 'routing: path':'nodes_list',\
-        try :
+        'routing: is loose?':'is_loose', 'path bandwidth':'path_bandwidth'}
-            service_fieldnames = [authorized_fieldnames[e] for e in header]
+    try:
-        except KeyError:
+        service_fieldnames = [authorized_fieldnames[e] for e in header]
-            msg = f'Malformed header on Service sheet: {header} field not in {authorized_fieldnames}'
+    except KeyError:
-            logger.critical(msg)
+        msg = f'Malformed header on Service sheet: {header} field not in {authorized_fieldnames}'
-            raise ValueError(msg)
+        logger.critical(msg)
-        for row in all_rows(service_sheet, start=5):
+        raise ValueError(msg)
-            yield Request(**parse_row(row[0:SERVICES_COLUMN], service_fieldnames))
+    for row in all_rows(service_sheet, start=5):
+        yield Request(**parse_row(row[0:SERVICES_COLUMN], service_fieldnames))

gnpy/core/spectrum_assignment.py

@@ -0,0 +1,386 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+"""
+gnpy.core.spectrum_assignment
+=============================
+
+This module contains the Oms and Bitmap classes and the different method to
+select and assign spectrum. Spectrum_selection function identifies the free
+slots and select_candidate selects the candidate spectrum according to
+strategy: for example first fit
+oms records its elements, and elements are updated with an oms to have
+element/oms correspondace
+"""
+
+from collections import namedtuple
+from logging import getLogger
+from math import ceil
+from gnpy.core.elements import Roadm, Transceiver
+from gnpy.core.exceptions import SpectrumError
+
+LOGGER = getLogger(__name__)
+
+class Bitmap:
+    """ records the spectrum occupation
+    """
+    def __init__(self, f_min, f_max, grid, guardband=0.15e12, bitmap=None):
+        # n is the min index including guardband. Guardband is require to be sure
+        # that a channel can be assigned  with center frequency fmin (means that its
+        # slot occupation goes below freq_index_min
+        n_min = frequency_to_n(f_min-guardband, grid)
+        n_max = frequency_to_n(f_max+guardband, grid) - 1
+        self.n_min = n_min
+        self.n_max = n_max
+        self.freq_index_min = frequency_to_n(f_min)
+        self.freq_index_max = frequency_to_n(f_max)
+        self.freq_index = list(range(n_min, n_max+1))
+        if bitmap is None:
+            self.bitmap = [1] * (n_max-n_min+1)
+        elif len(bitmap) == len(self.freq_index):
+            self.bitmap = bitmap
+        else:
+            raise SpectrumError(f'bitmap is not consistant with f_min{f_min} - n: {n_min} and f_max{f_max}- n :{n_max}')
+
+    def getn(self, i):
+        """ converts the n (itu grid) into a local index
+        """
+        return self.freq_index[i]
+    def geti(self, nvalue):
+        """ converts the local index into n (itu grid)
+        """
+        return self.freq_index.index(nvalue)
+    def insert_left(self, newbitmap):
+        """ insert bitmap on the left to align oms bitmaps if their start frequencies are different
+        """
+        self.bitmap = newbitmap + self.bitmap
+        temp = list(range(self.n_min-len(newbitmap), self.n_min))
+        self.freq_index = temp + self.freq_index
+        self.n_min = self.freq_index[0]
+    def insert_right(self, newbitmap):
+        """ insert bitmap on the right to align oms bitmaps if their stop frequencies are different
+        """
+        self.bitmap = self.bitmap + newbitmap
+        self.freq_index = self.freq_index + list(range(self.n_max, self.n_max+len(newbitmap)))
+        self.n_max = self.freq_index[-1]
+
+#    +'grid available_slots f_min f_max services_list')
+OMSParams = namedtuple('OMSParams', 'oms_id el_id_list el_list')
+
+class OMS:
+    """ OMS class is the logical container that represent a link between two adjacent ROADMs and
+        records the crossed elements and the occupied spectrum
+    """
+    def __init__(self, *args, **params):
+        params = OMSParams(**params)
+        self.oms_id = params.oms_id
+        self.el_id_list = params.el_id_list
+        self.el_list = params.el_list
+        self.spectrum_bitmap = []
+        self.nb_channels = 0
+        self.service_list = []
+    # TODO
+    def __str__(self):
+        return '\n\t'.join([f'{type(self).__name__} {self.oms_id}',
+                               f'{self.el_id_list[0]} - {self.el_id_list[-1]}'])
+    def __repr__(self):
+        return '\n\t'.join([f'{type(self).__name__} {self.oms_id}',
+                               f'{self.el_id_list[0]} - {self.el_id_list[-1]}', '\n'])
+
+    def add_element(self, elem):
+        """ records oms elements
+        """
+        self.el_id_list.append(elem.uid)
+        self.el_list.append(elem)
+
+    def update_spectrum(self, f_min, f_max, guardband=0.15e12, existing_spectrum=None,
+                        grid=0.00625e12):
+        """ frequencies expressed in Hz
+        """
+        if existing_spectrum is None:
+            # add some 150 GHz margin to enable a center channel on f_min
+            # use ITU-T G694.1
+            # Flexible DWDM grid definition
+            # For the flexible DWDM grid, the allowed frequency slots have a nominal
+            # central frequency (in THz) defined by:
+            # 193.1 + n × 0.00625 where n is a positive or negative integer including 0
+            # and 0.00625 is the nominal central frequency granularity in THz
+            # and a slot width defined by:
+            # 12.5 × m where m is a positive integer and 12.5 is the slot width granularity in
+            # GHz.
+            # Any combination of frequency slots is allowed as long as no two frequency
+            # slots overlap.
+
+            # TODO : add explaination on that / parametrize ....
+            self.spectrum_bitmap = Bitmap(f_min, f_max, grid, guardband)
+            # print(len(self.spectrum_bitmap.bitmap))
+
+    def assign_spectrum(self, nvalue, mvalue):
+        """ change oms spectrum to mark spectrum assigned
+        """
+        if (nvalue is None or mvalue is None or isinstance(nvalue, float)
+                or isinstance(mvalue, float) or mvalue == 0):
+            raise SpectrumError('could not assign None values')
+        startn, stopn = mvalue_to_slots(nvalue, mvalue)
+        # print(f'startn stop n {startn} , {stopn}')
+        # assumes that guardbands are sufficient to ensure that assigning a center channel
+        # at fmin or fmax is OK is startn > self.spectrum_bitmap.n_min
+        if (nvalue <= self.spectrum_bitmap.freq_index_max and
+                nvalue >= self.spectrum_bitmap.freq_index_min and
+                stopn <= self.spectrum_bitmap.n_max and
+                startn > self.spectrum_bitmap.n_min):
+            # verification that both length are identical
+            self.spectrum_bitmap.bitmap[self.spectrum_bitmap.geti(startn):self.spectrum_bitmap.geti(stopn)+1] = [0] * (stopn-startn+1)
+            return True
+        else:
+            msg = f'Could not assign n {nvalue}, m {mvalue} values:' +\
+                  f' one or several slots are not available'
+            LOGGER.info(msg)
+            return False
+
+    def add_service(self, service_id, nb_wl):
+        """ record service and mark spectrum as occupied
+        """
+        self.service_list.append(service_id)
+        self.nb_channels += nb_wl
+
+def frequency_to_n(freq, grid=0.00625e12):
+    """ converts frequency into the n value (ITU grid)
+    """
+    return (int)((freq-193.1e12)/grid)
+
+def nvalue_to_frequency(nvalue, grid=0.00625e12):
+    """ converts n value into a frequency
+    """
+    return 193.1e12 + nvalue * grid
+
+def mvalue_to_slots(nvalue, mvalue):
+    """ convert center n an m into start and stop n
+    """
+    startn = nvalue - mvalue
+    stopn = nvalue + mvalue -1
+    return startn, stopn
+
+def slots_to_m(startn, stopn):
+    """ converts the start and stop n values to the center n and m value
+    """
+    nvalue = (int)((startn+stopn+1)/2)
+    mvalue = (int)((stopn-startn+1)/2)
+    return nvalue, mvalue
+
+def m_to_freq(nvalue, mvalue, grid=0.00625e12):
+    """ converts m into frequency range
+    """
+    startn, stopn = mvalue_to_slots(nvalue, mvalue)
+    fstart = nvalue_to_frequency(startn, grid)
+    fstop = nvalue_to_frequency(stopn+1, grid)
+    return fstart, fstop
+
+def align_grids(oms_list):
+    """ used to apply same grid to all oms : same starting n, stop n and slot size
+        out of grid slots are set to 0
+    """
+    n_min = min([o.spectrum_bitmap.n_min for o in oms_list])
+    n_max = max([o.spectrum_bitmap.n_max for o in oms_list])
+    for this_o in oms_list:
+        if (this_o.spectrum_bitmap.n_min - n_min) > 0:
+            this_o.spectrum_bitmap.insert_left([0] * (this_o.spectrum_bitmap.n_min - n_min))
+        if (n_max - this_o.spectrum_bitmap.n_max) > 0:
+            this_o.spectrum_bitmap.insert_right([0] * (n_max - this_o.spectrum_bitmap.n_max))
+    return oms_list
+
+def build_oms_list(network, equipment):
+    """ initialization of OMS list in the network
+        an oms is build reading all intermediate nodes between two adjacent ROADMs
+        each element within the list is being added an oms and oms_id to record the
+        oms it belongs to.
+        the function supports different spectrum width and supposes that the whole network
+        works with the min range among OMSs
+    """
+    oms_id = 0
+    oms_list = []
+    for node in [n for n in network.nodes() if isinstance(n, Roadm)]:
+        for edge in network.edges([node]):
+            if not isinstance(edge[1], Transceiver):
+                nd_in = edge[0] # nd_in is a Roadm
+                try:
+                    nd_in.oms_list.append(oms_id)
+                except AttributeError:
+                    nd_in.oms_list = []
+                    nd_in.oms_list.append(oms_id)
+                nd_out = edge[1]
+
+                params = {}
+                params['oms_id'] = oms_id
+                params['el_id_list'] = []
+                params['el_list'] = []
+                oms = OMS(**params)
+                oms.add_element(nd_in)
+                while not isinstance(nd_out, Roadm):
+                    oms.add_element(nd_out)
+                    # add an oms_id in the element
+                    nd_out.oms_id = oms_id
+                    nd_out.oms = oms
+                    n_temp = nd_out
+                    nd_out = next(n[1] for n in network.edges([n_temp]) if n[1].uid != nd_in.uid)
+                    nd_in = n_temp
+
+                oms.add_element(nd_out)
+                # nd_out is a Roadm
+                try:
+                    nd_out.oms_list.append(oms_id)
+                except AttributeError:
+                    nd_out.oms_list = []
+                    nd_out.oms_list.append(oms_id)
+
+                oms.update_spectrum(equipment['SI']['default'].f_min,
+                                    equipment['SI']['default'].f_max, grid=0.00625e12)
+                # oms.assign_spectrum(13,7) gives back (193137500000000.0, 193225000000000.0)
+                # as in the example in the standard
+                # oms.assign_spectrum(13,7)
+
+                oms_list.append(oms)
+                oms_id += 1
+    oms_list = align_grids(oms_list)
+    reversed_oms(oms_list)
+    return oms_list
+
+def reversed_oms(oms_list):
+    """ identifies reversed OMS
+        only applicable for non parallel OMS
+    """
+    for oms in oms_list:
+        has_reversed = False
+        for this_o in oms_list:
+            if (oms.el_id_list[0] == this_o.el_id_list[-1] and
+                    oms.el_id_list[-1] == this_o.el_id_list[0]):
+                oms.reversed_oms = this_o
+                has_reversed = True
+                break
+        if not has_reversed:
+            oms.reversed_oms = None
+
+
+def bitmap_sum(band1, band2):
+    """ a functions that marks occupied bitmap by 0 if the slot is occupied in band1 or in band2
+    """
+    res = []
+    for i, elem in enumerate(band1):
+        if band2[i] * elem == 0:
+            res.append(0)
+        else:
+            res.append(1)
+    return res
+
+def spectrum_selection(pth, oms_list, requested_m, requested_n=None):
+    """ collects spectrum availability and call the select_candidate function
+    # step 1 collects pth spectrum availability
+    # step 2 if n is not None try to assign the spectrum
+    #            if the spectrum is not available then sends back an "error"
+    #        if n is None selects candidate spectrum
+    #            select spectrum that fits the policy ( first fit, random, ABP...)
+    # step3 returns the selection
+    """
+
+    # use indexes instead of ITU-T n values
+    path_oms = []
+    for elem in pth:
+        if not isinstance(elem, Roadm) and not isinstance(elem, Transceiver):
+            # only edfa, fused and fibers have oms_id attribute
+            path_oms.append(elem.oms_id)
+    # remove duplicate oms_id, order is not important
+    path_oms = list(set(path_oms))
+    # assuming all oms have same freq index
+    if not path_oms:
+        candidate = (None, None, None)
+        return candidate, path_oms
+    freq_index = oms_list[path_oms[0]].spectrum_bitmap.freq_index
+    freq_index_min = oms_list[path_oms[0]].spectrum_bitmap.freq_index_min
+    freq_index_max = oms_list[path_oms[0]].spectrum_bitmap.freq_index_max
+
+    freq_availability = oms_list[path_oms[0]].spectrum_bitmap.bitmap
+    for oms in path_oms[1:]:
+        freq_availability = bitmap_sum(oms_list[oms].spectrum_bitmap.bitmap, freq_availability)
+    if requested_n is None:
+        # avoid slots reserved on the edge 0.15e-12 on both sides -> 24
+        candidates = [(freq_index[i]+requested_m, freq_index[i], freq_index[i]+2*requested_m-1)
+                      for i in range(len(freq_availability))
+                      if freq_availability[i:i+2*requested_m] == [1] * (2*requested_m)
+                      and freq_index[i] >= freq_index_min
+                      and freq_index[i+2*requested_m-1] <= freq_index_max]
+
+        candidate = select_candidate(candidates, policy='first_fit')
+    else:
+        i = oms_list[path_oms[0]].spectrum_bitmap.geti(requested_n)
+        # print(f'N {requested_n} i {i}')
+        # print(freq_availability[i-m:i+m] )
+        # print(freq_index[i-m:i+m])
+        if (freq_availability[i-requested_m:i+requested_m] == [1] * (2*requested_m) and
+                freq_index[i-requested_m] >= freq_index_min
+                      and freq_index[i+requested_m-1] <= freq_index_max):
+            # candidate is the triplet center_n, startn and stopn
+            candidate = (requested_n, requested_n-requested_m, requested_n+requested_m-1)
+        else:
+            candidate = (None, None, None)
+        # print("coucou11")
+        # print(candidate)
+    # print(freq_availability[321:321+2*m])
+    # a = [i+321 for i in range(2*m)]
+    # print(a)
+    # print(candidate)
+    return candidate, path_oms
+
+def select_candidate(candidates, policy):
+    """ selects a candidate among all available spectrum
+    """
+    if policy == 'first_fit':
+        if candidates:
+            return candidates[0]
+        else:
+            return (None, None, None)
+    else:
+        raise ServiceError('Only first_fit spectrum assignment policy is implemented.')
+
+def pth_assign_spectrum(pths, rqs, oms_list, rpths):
+    """ basic first fit assignment
+        if reversed path are provided, means that occupation is bidir
+    """
+    for i, pth in enumerate(pths):
+        # computes the number of channels required
+        try:
+            if rqs[i].blocking_reason:
+                rqs[i].blocked = True
+                rqs[i].N = 0
+                rqs[i].M = 0
+        except AttributeError:
+            nb_wl = ceil(rqs[i].path_bandwidth / rqs[i].bit_rate)
+            # computes the total nb of slots according to requested spacing
+            # TODO : express superchannels
+            # assumes that all channels must be grouped
+            # TODO : enables non contiguous reservation in case of blocking
+            requested_m = ceil(rqs[i].spacing / 0.0125e12) * nb_wl
+            # concatenate all path and reversed path elements to derive slots availability
+            (center_n, startn, stopn), path_oms = spectrum_selection(pth + rpths[i], oms_list, requested_m,
+                                                                     requested_n=None)
+            # checks that requested_m is fitting startm and stopm
+            # if not None, center_n and start, stop frequencies are applicable to all oms of pth
+            # checks that spectrum is not None else indicate blocking reason
+            if center_n is not None:
+                # checks that requested_m is fitting startm and stopm
+                if 2 * requested_m > (stopn - startn + 1):
+                    msg = f'candidate: {(center_n, startn, stopn)} is not consistant ' +\
+                          f'with {requested_m}'
+                    LOGGER.critical(msg)
+                    raise ValueError(msg)
+
+                for oms_elem in path_oms:
+                    oms_list[oms_elem].assign_spectrum(center_n, requested_m)
+                    oms_list[oms_elem].add_service(rqs[i].request_id, nb_wl)
+                rqs[i].blocked = False
+                rqs[i].N = center_n
+                rqs[i].M = requested_m
+            else:
+                rqs[i].blocked = True
+                rqs[i].N = 0
+                rqs[i].M = 0
+                rqs[i].blocking_reason = 'NO_SPECTRUM'

path_result_template.json

@@ -59,6 +59,4 @@
           }
         ]
       }
-    }
+    },      
-  ]
-}

requirements.txt

@@ -1,4 +1,7 @@
 alabaster>=0.7.12,<1
+docutils==0.15.2
+flask==1.0.2
+flask-restful==0.3.7
 matplotlib>=3.1.0,<4
 networkx>=2.3,<3
 numpy>=1.16.1,<2

service-template.json

@@ -47,24 +47,25 @@
       "path-constraints": {
         "te-bandwidth": {
           "technology": "flexi-grid",
-          "trx_type": null,
+          "trx_type": "name of the tsp type_variety as listed in the library",
-          "trx_mode": null,
+          "trx_mode": "optional, name of the mode as listed in the tsp type_variety",
           "effective-freq-slot": [
             {
               "n": "null",
               "m": "null"
             }
           ],
-          "spacing": null,
+          "spacing": mandatory decimal Hz,
-          "max-nb-of-channel": null,
+          "max-nb-of-channel": optional integer,
-          "output-power": null,
+          "output-power": optional decimal W,
-          "path_bandwidth": null
+          "path_bandwidth": optional bit/s
-          }
+        }
       }
-    }],
+    }
-  "synchronization": [
+  ],
+  "synchronization": [   list of disjunctions, optional
     {
-      "synchronization-id": null,
+      "synchronization-id": "3",
       "svec": {
         "relaxable": "True",
         "disjointness": "node link",
@@ -72,5 +73,5 @@
          null, null ]
         },
     }
-    ]
+  ]  
 }

setup.py

@@ -11,7 +11,7 @@ with open(path.join(here, 'README.rst'), encoding='utf-8') as f:
 
 setup(
     name='gnpy',
-    version='1.2.0',
+    version='2.1',
     description='route planning and optimization tool for mesh optical networks',
     long_description=long_description,
     long_description_content_type='text/x-rst; charset=UTF-8',

tests/compare.py

@@ -77,8 +77,11 @@ def compare_networks(expected, actual):
 def compare_services(expected, actual):
     requests = compare(expected['path-request'], actual['path-request'],
                        key=lambda el: el['request-id'])
-    synchronizations = compare(expected['synchronization'], actual['synchronization'],
+    synchronizations = compare(expected['path-request'], expected['path-request'],
-                               key=lambda el: el['synchronization-id'])
+                               key=lambda el: el['request-id'])
+    if 'synchronization' in expected.keys():
+        synchronizations = compare(expected['synchronization'], actual['synchronization'],
+                                   key=lambda el: el['synchronization-id'])
     return ServicesResults(requests, synchronizations)
 
 def compare_paths(expected_output, actual_output):

tests/data/expected_results_science_utils.csv

@@ -0,0 +1,97 @@
+,signal,ase,nli
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tests/data/raman_fiber_config.json

@@ -0,0 +1,223 @@
+{
+  "uid": "Span1",
+  "params": {
+    "length": 80,
+    "loss_coef": 0.2,
+    "length_units": "km",
+    "att_in": 0,
+    "con_in": 0.5,
+    "con_out": 0.5,
+    "type_variety": "SSMF",
+    "dispersion": 0.0000167,
+    "gamma": 0.00127,
+    "raman_efficiency": {
+      "cr": [
+        0,
+        0.0000094,
+        0.0000292,
+        0.0000488,
+        0.0000682,
+        0.0000831,
+        0.000094,
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+        4e-7,
+        2e-7,
+        1e-7
+      ],
+      "frequency_offset": [
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+        41000000000000,
+        41500000000000,
+        42000000000000
+      ]
+    }
+  },
+  "operational": {
+    "temperature": 283,
+    "raman_pumps": [
+      {
+        "power": 0.2,
+        "frequency": 205000000000000,
+        "propagation_direction": "counterprop"
+      },
+      {
+        "power": 0.206,
+        "frequency": 201000000000000,
+        "propagation_direction": "counterprop"
+      }
+    ]
+  },
+  "metadata": {
+    "location": {
+      "latitude": 1,
+      "longitude": 0,
+      "city": null,
+      "region": ""
+    }
+  }
+}

tests/data/sim_params.json

@@ -0,0 +1,14 @@
+{
+  "raman_computed_channels": [1, 18, 37, 56, 75],
+  "raman_parameters": {
+    "flag_raman": true,
+    "space_resolution": 10e3,
+    "tolerance": 1e-8
+  },
+  "nli_parameters": {
+  	"nli_method_name": "ggn_spectrally_separated",
+  	"wdm_grid_size": 50e9,
+  	"dispersion_tolerance": 1,
+  	"phase_shift_tollerance": 0.1
+  }
+}

tests/data/testService_services_expected.json

@@ -0,0 +1,79 @@
+{
+  "path-request": [
+    {
+      "request-id": "0",
+      "source": "trx Lorient_KMA",
+      "destination": "trx Vannes_KBE",
+      "src-tp-id": "trx Lorient_KMA",
+      "dst-tp-id": "trx Vannes_KBE",
+      "bidirectional": false,
+      "path-constraints": {
+        "te-bandwidth": {
+          "technology": "flexi-grid",
+          "trx_type": "Voyager",
+          "trx_mode": "mode 1",
+          "effective-freq-slot": [
+            {
+              "N": "null",
+              "M": "null"
+            }
+          ],
+          "spacing": 50000000000.0,
+          "max-nb-of-channel": 80,
+          "output-power": null,
+          "path_bandwidth": 100000000000.0
+        }
+      }
+    },
+    {
+      "request-id": "1",
+      "source": "trx Brest_KLA",
+      "destination": "trx Vannes_KBE",
+      "src-tp-id": "trx Brest_KLA",
+      "dst-tp-id": "trx Vannes_KBE",
+      "bidirectional": false,
+      "path-constraints": {
+        "te-bandwidth": {
+          "technology": "flexi-grid",
+          "trx_type": "Voyager",
+          "trx_mode": "mode 1",
+          "effective-freq-slot": [
+            {
+              "N": "null",
+              "M": "null"
+            }
+          ],
+          "spacing": 50000000000.0,
+          "max-nb-of-channel": null,
+          "output-power": 0.0012589254117941673,
+          "path_bandwidth": 10000000000.0
+        }
+      }
+    },
+    {
+      "request-id": "3",
+      "source": "trx Lannion_CAS",
+      "destination": "trx Rennes_STA",
+      "src-tp-id": "trx Lannion_CAS",
+      "dst-tp-id": "trx Rennes_STA",
+      "bidirectional": false,
+      "path-constraints": {
+        "te-bandwidth": {
+          "technology": "flexi-grid",
+          "trx_type": "vendorA_trx-type1",
+          "trx_mode": "mode 1",
+          "effective-freq-slot": [
+            {
+              "N": "null",
+              "M": "null"
+            }
+          ],
+          "spacing": 50000000000.0,
+          "max-nb-of-channel": 80,
+          "output-power": 0.0012589254117941673,
+          "path_bandwidth": 60000000000.0
+        }
+      }
+    }
+  ]
+}

tests/data/testTopology_response_expected.csv

@@ -1,7 +1,8 @@
-response-id,source,destination,path_bandwidth,Pass?,nb of tsp pairs,total cost,transponder-type,transponder-mode,OSNR-0.1nm,SNR-0.1nm,SNR-bandwidth,baud rate (Gbaud),input power (dBm),path
+response-id,source,destination,path_bandwidth,Pass?,nb of tsp pairs,total cost,transponder-type,transponder-mode,OSNR-0.1nm,SNR-0.1nm,SNR-bandwidth,baud rate (Gbaud),input power (dBm),path,"spectrum (N,M)",reversed path OSNR-0.1nm,reversed path SNR-0.1nm,reversed path SNR-bandwidth
-0,trx Lorient_KMA,trx Vannes_KBE,100.0,True,1,1,Voyager,mode 1,30.84,30.84,26.75,32.0,0.0,trx Lorient_KMA | roadm Lorient_KMA | Edfa1_roadm Lorient_KMA | fiber (Lorient_KMA → Vannes_KBE)-F055 | Edfa0_fiber (Lorient_KMA → Vannes_KBE)-F055 | roadm Vannes_KBE | trx Vannes_KBE
+0,trx Lorient_KMA,trx Vannes_KBE,100.0,True,1,1,Voyager,mode 1,30.84,30.84,26.75,32.0,0.0,trx Lorient_KMA | roadm Lorient_KMA | Edfa1_roadm Lorient_KMA | fiber (Lorient_KMA → Vannes_KBE)-F055 | Edfa0_fiber (Lorient_KMA → Vannes_KBE)-F055 | roadm Vannes_KBE | trx Vannes_KBE,"-284, 4"
-1,trx Brest_KLA,trx Vannes_KBE,0.0,True,0,0,Voyager,mode 1,22.65,22.11,18.03,32.0,1.0,trx Brest_KLA | roadm Brest_KLA | Edfa0_roadm Brest_KLA | fiber (Brest_KLA → Morlaix)-F060 | east fused spans in Morlaix | fiber (Morlaix → Lannion_CAS)-F059 | west edfa in Lannion_CAS to Morlaix | roadm Lannion_CAS | east edfa in Lannion_CAS to Corlay | fiber (Lannion_CAS → Corlay)-F061 | west fused spans in Corlay | fiber (Corlay → Loudeac)-F010 | west fused spans in Loudeac | fiber (Loudeac → Lorient_KMA)-F054 | Edfa0_fiber (Loudeac → Lorient_KMA)-F054 | roadm Lorient_KMA | Edfa1_roadm Lorient_KMA | fiber (Lorient_KMA → Vannes_KBE)-F055 | Edfa0_fiber (Lorient_KMA → Vannes_KBE)-F055 | roadm Vannes_KBE | trx Vannes_KBE
+1,trx Brest_KLA,trx Vannes_KBE,10.0,True,1,1,Voyager,mode 1,22.65,22.11,18.03,32.0,1.0,trx Brest_KLA | roadm Brest_KLA | Edfa0_roadm Brest_KLA | fiber (Brest_KLA → Morlaix)-F060 | east fused spans in Morlaix | fiber (Morlaix → Lannion_CAS)-F059 | west edfa in Lannion_CAS to Morlaix | roadm Lannion_CAS | east edfa in Lannion_CAS to Corlay | fiber (Lannion_CAS → Corlay)-F061 | west fused spans in Corlay | fiber (Corlay → Loudeac)-F010 | west fused spans in Loudeac | fiber (Loudeac → Lorient_KMA)-F054 | Edfa0_fiber (Loudeac → Lorient_KMA)-F054 | roadm Lorient_KMA | Edfa1_roadm Lorient_KMA | fiber (Lorient_KMA → Vannes_KBE)-F055 | Edfa0_fiber (Lorient_KMA → Vannes_KBE)-F055 | roadm Vannes_KBE | trx Vannes_KBE,"-276, 4"
-3,trx Lannion_CAS,trx Rennes_STA,60.0,True,1,1,vendorA_trx-type1,mode 1,28.29,25.85,21.77,32.0,1.0,trx Lannion_CAS | roadm Lannion_CAS | east edfa in Lannion_CAS to Stbrieuc | fiber (Lannion_CAS → Stbrieuc)-F056 | east edfa in Stbrieuc to Rennes_STA | fiber (Stbrieuc → Rennes_STA)-F057 | Edfa0_fiber (Stbrieuc → Rennes_STA)-F057 | roadm Rennes_STA | trx Rennes_STA
+3,trx Lannion_CAS,trx Rennes_STA,60.0,True,1,1,vendorA_trx-type1,mode 1,28.29,25.85,21.77,32.0,1.0,trx Lannion_CAS | roadm Lannion_CAS | east edfa in Lannion_CAS to Stbrieuc | fiber (Lannion_CAS → Stbrieuc)-F056 | east edfa in Stbrieuc to Rennes_STA | fiber (Stbrieuc → Rennes_STA)-F057 | Edfa0_fiber (Stbrieuc → Rennes_STA)-F057 | roadm Rennes_STA | trx Rennes_STA,"-284, 4"
-4,trx Rennes_STA,trx Lannion_CAS,150.0,True,1,1,vendorA_trx-type1,mode 2,22.27,22.15,15.05,64.0,0.0,trx Rennes_STA | roadm Rennes_STA | Edfa1_roadm Rennes_STA | fiber (Rennes_STA → Ploermel)- | east edfa in Ploermel to Vannes_KBE | fiber (Ploermel → Vannes_KBE)- | Edfa0_fiber (Ploermel → Vannes_KBE)- | roadm Vannes_KBE | Edfa0_roadm Vannes_KBE | fiber (Vannes_KBE → Lorient_KMA)-F055 | Edfa0_fiber (Vannes_KBE → Lorient_KMA)-F055 | roadm Lorient_KMA | Edfa0_roadm Lorient_KMA | fiber (Lorient_KMA → Loudeac)-F054 | east fused spans in Loudeac | fiber (Loudeac → Corlay)-F010 | east fused spans in Corlay | fiber (Corlay → Lannion_CAS)-F061 | west edfa in Lannion_CAS to Corlay | roadm Lannion_CAS | trx Lannion_CAS
+4,trx Rennes_STA,trx Lannion_CAS,150.0,True,1,1,vendorA_trx-type1,mode 2,22.27,22.15,15.05,64.0,0.0,trx Rennes_STA | roadm Rennes_STA | Edfa1_roadm Rennes_STA | fiber (Rennes_STA → Ploermel)- | east edfa in Ploermel to Vannes_KBE | fiber (Ploermel → Vannes_KBE)- | Edfa0_fiber (Ploermel → Vannes_KBE)- | roadm Vannes_KBE | Edfa0_roadm Vannes_KBE | fiber (Vannes_KBE → Lorient_KMA)-F055 | Edfa0_fiber (Vannes_KBE → Lorient_KMA)-F055 | roadm Lorient_KMA | Edfa0_roadm Lorient_KMA | fiber (Lorient_KMA → Loudeac)-F054 | east fused spans in Loudeac | fiber (Loudeac → Corlay)-F010 | east fused spans in Corlay | fiber (Corlay → Lannion_CAS)-F061 | west edfa in Lannion_CAS to Corlay | roadm Lannion_CAS | trx Lannion_CAS,"-266, 6"
-5,trx Rennes_STA,trx Lannion_CAS,20.0,True,1,1,vendorA_trx-type1,mode 2,30.79,28.77,21.68,64.0,3.0,trx Rennes_STA | roadm Rennes_STA | Edfa0_roadm Rennes_STA | fiber (Rennes_STA → Stbrieuc)-F057 | Edfa0_fiber (Rennes_STA → Stbrieuc)-F057 | fiber (Stbrieuc → Lannion_CAS)-F056 | Edfa0_fiber (Stbrieuc → Lannion_CAS)-F056 | roadm Lannion_CAS | trx Lannion_CAS
+5,trx Rennes_STA,trx Lannion_CAS,20.0,True,1,1,vendorA_trx-type1,mode 2,30.79,28.77,21.68,64.0,3.0,trx Rennes_STA | roadm Rennes_STA | Edfa0_roadm Rennes_STA | fiber (Rennes_STA → Stbrieuc)-F057 | Edfa0_fiber (Rennes_STA → Stbrieuc)-F057 | fiber (Stbrieuc → Lannion_CAS)-F056 | Edfa0_fiber (Stbrieuc → Lannion_CAS)-F056 | roadm Lannion_CAS | trx Lannion_CAS,"-274, 6"
-6,,,,False,0,,,,,,,,,
+6,,,,NO_PATH,,,,,,,,,,,
+

tests/data/testTopology_services_expected.json

@@ -6,6 +6,7 @@
       "destination": "trx Vannes_KBE",
       "src-tp-id": "trx Lorient_KMA",
       "dst-tp-id": "trx Vannes_KBE",
+      "bidirectional": false,
       "path-constraints": {
         "te-bandwidth": {
           "technology": "flexi-grid",
@@ -30,6 +31,7 @@
       "destination": "trx Vannes_KBE",
       "src-tp-id": "trx Brest_KLA",
       "dst-tp-id": "trx Vannes_KBE",
+      "bidirectional": false,
       "path-constraints": {
         "te-bandwidth": {
           "technology": "flexi-grid",
@@ -44,7 +46,7 @@
           "spacing": 50000000000.0,
           "max-nb-of-channel": null,
           "output-power": 0.0012589254117941673,
-          "path_bandwidth": 0
+          "path_bandwidth": 10000000000.0
         }
       },
       "explicit-route-objects": {
@@ -94,6 +96,7 @@
       "destination": "trx Rennes_STA",
       "src-tp-id": "trx Lannion_CAS",
       "dst-tp-id": "trx Rennes_STA",
+      "bidirectional": false,
       "path-constraints": {
         "te-bandwidth": {
           "technology": "flexi-grid",
@@ -118,6 +121,7 @@
       "destination": "trx Lannion_CAS",
       "src-tp-id": "trx Rennes_STA",
       "dst-tp-id": "trx Lannion_CAS",
+      "bidirectional": false,
       "path-constraints": {
         "te-bandwidth": {
           "technology": "flexi-grid",
@@ -142,6 +146,7 @@
       "destination": "trx Lannion_CAS",
       "src-tp-id": "trx Rennes_STA",
       "dst-tp-id": "trx Lannion_CAS",
+      "bidirectional": false,
       "path-constraints": {
         "te-bandwidth": {
           "technology": "flexi-grid",
@@ -166,6 +171,7 @@
       "destination": "trx a",
       "src-tp-id": "trx Lannion_CAS",
       "dst-tp-id": "trx a",
+      "bidirectional": false,
       "path-constraints": {
         "te-bandwidth": {
           "technology": "flexi-grid",

tests/data/testTopology_testservices.json

@@ -6,6 +6,7 @@
       "destination": "trx g",
       "src-tp-id": "trx a",
       "dst-tp-id": "trx g",
+      "bidirectional": false,
       "path-constraints": {
         "te-bandwidth": {
           "technology": "flexi-grid",
@@ -30,6 +31,7 @@
       "destination": "trx h",
       "src-tp-id": "trx a",
       "dst-tp-id": "trx h",
+      "bidirectional": false,
       "path-constraints": {
         "te-bandwidth": {
           "technology": "flexi-grid",
@@ -54,6 +56,7 @@
       "destination": "trx b",
       "src-tp-id": "trx f",
       "dst-tp-id": "trx b",
+      "bidirectional": false,
       "path-constraints": {
         "te-bandwidth": {
           "technology": "flexi-grid",
@@ -78,6 +81,7 @@
       "destination": "trx f",
       "src-tp-id": "trx c",
       "dst-tp-id": "trx f",
+      "bidirectional": false,
       "path-constraints": {
         "te-bandwidth": {
           "technology": "flexi-grid",
@@ -123,6 +127,7 @@
       "destination": "trx f",
       "src-tp-id": "trx c",
       "dst-tp-id": "trx f",
+      "bidirectional": false,
       "path-constraints": {
         "te-bandwidth": {
           "technology": "flexi-grid",
@@ -147,6 +152,7 @@
       "destination": "trx g",
       "src-tp-id": "trx a",
       "dst-tp-id": "trx g",
+      "bidirectional": false,
       "path-constraints": {
         "te-bandwidth": {
           "technology": "flexi-grid",
@@ -171,6 +177,7 @@
       "destination": "trx h",
       "src-tp-id": "trx a",
       "dst-tp-id": "trx h",
+      "bidirectional": false,
       "path-constraints": {
         "te-bandwidth": {
           "technology": "flexi-grid",
@@ -208,6 +215,7 @@
       "destination": "trx b",
       "src-tp-id": "trx f",
       "dst-tp-id": "trx b",
+      "bidirectional": false,
       "path-constraints": {
         "te-bandwidth": {
           "technology": "flexi-grid",
@@ -245,6 +253,7 @@
       "destination": "trx f",
       "src-tp-id": "trx c",
       "dst-tp-id": "trx f",
+      "bidirectional": false,
       "path-constraints": {
         "te-bandwidth": {
           "technology": "flexi-grid",
@@ -269,6 +278,7 @@
       "destination": "trx f",
       "src-tp-id": "trx c",
       "dst-tp-id": "trx f",
+      "bidirectional": false,
       "path-constraints": {
         "te-bandwidth": {
           "technology": "flexi-grid",
@@ -314,6 +324,7 @@
       "destination": "trx g",
       "src-tp-id": "trx a",
       "dst-tp-id": "trx g",
+      "bidirectional": false,
       "path-constraints": {
         "te-bandwidth": {
           "technology": "flexi-grid",
@@ -338,6 +349,7 @@
       "destination": "trx h",
       "src-tp-id": "trx a",
       "dst-tp-id": "trx h",
+      "bidirectional": false,
       "path-constraints": {
         "te-bandwidth": {
           "technology": "flexi-grid",
@@ -362,6 +374,7 @@
       "destination": "trx b",
       "src-tp-id": "trx f",
       "dst-tp-id": "trx b",
+      "bidirectional": false,
       "path-constraints": {
         "te-bandwidth": {
           "technology": "flexi-grid",
@@ -386,6 +399,7 @@
       "destination": "trx f",
       "src-tp-id": "trx c",
       "dst-tp-id": "trx f",
+      "bidirectional": false,
       "path-constraints": {
         "te-bandwidth": {
           "technology": "flexi-grid",
@@ -431,6 +445,7 @@
       "destination": "trx f",
       "src-tp-id": "trx c",
       "dst-tp-id": "trx f",
+      "bidirectional": false,
       "path-constraints": {
         "te-bandwidth": {
           "technology": "flexi-grid",
@@ -455,6 +470,7 @@
       "destination": "trx g",
       "src-tp-id": "trx a",
       "dst-tp-id": "trx g",
+      "bidirectional": false,
       "path-constraints": {
         "te-bandwidth": {
           "technology": "flexi-grid",
@@ -479,6 +495,7 @@
       "destination": "trx h",
       "src-tp-id": "trx a",
       "dst-tp-id": "trx h",
+      "bidirectional": false,
       "path-constraints": {
         "te-bandwidth": {
           "technology": "flexi-grid",
@@ -503,6 +520,7 @@
       "destination": "trx b",
       "src-tp-id": "trx f",
       "dst-tp-id": "trx b",
+      "bidirectional": false,
       "path-constraints": {
         "te-bandwidth": {
           "technology": "flexi-grid",
@@ -527,6 +545,7 @@
       "destination": "trx b",
       "src-tp-id": "trx f",
       "dst-tp-id": "trx b",
+      "bidirectional": false,
       "path-constraints": {
         "te-bandwidth": {
           "technology": "flexi-grid",

tests/test_automaticmodefeature.py

@@ -18,10 +18,8 @@ from pathlib import Path
 import pytest
 from gnpy.core.equipment import load_equipment, trx_mode_params, automatic_nch
 from gnpy.core.network import load_network, build_network
-from examples.path_requests_run import (requests_from_json , correct_route_list ,
+from examples.path_requests_run import requests_from_json, correct_route_list, load_requests
-                                        load_requests , disjunctions_from_json)
+from gnpy.core.request import compute_path_dsjctn, propagate, propagate_and_optimize_mode
-from gnpy.core.request import (compute_path_dsjctn, isdisjoint , find_reversed_path,
-                               propagate,propagate_and_optimize_mode) 
 from gnpy.core.utils import db2lin, lin2db
 from gnpy.core.elements import Roadm
 
@@ -35,7 +33,7 @@ eqpt_library_name = Path(__file__).parent.parent / 'tests/data/eqpt_config.json'
 @pytest.mark.parametrize("serv",[service_file_name])
 @pytest.mark.parametrize("expected_mode",[['16QAM', 'PS_SP64_1', 'PS_SP64_1', 'PS_SP64_1', 'mode 2 - fake', 'mode 2', 'PS_SP64_1', 'mode 3', 'PS_SP64_1', 'PS_SP64_1', '16QAM', 'mode 1', 'PS_SP64_1', 'PS_SP64_1', 'mode 1', 'mode 2', 'mode 1', 'mode 2', 'nok']])
 def test_automaticmodefeature(net,eqpt,serv,expected_mode):
-    data = load_requests(serv,eqpt)
+    data = load_requests(serv, eqpt, bidir=False)
     equipment = load_equipment(eqpt)
     network = load_network(net,equipment)
 

tests/test_disjunction.py

@@ -19,6 +19,7 @@ from examples.path_requests_run import (requests_from_json , correct_route_list
 from gnpy.core.request import compute_path_dsjctn, isdisjoint , find_reversed_path
 from gnpy.core.utils import db2lin, lin2db
 from gnpy.core.elements import Roadm
+from gnpy.core.spectrum_assignment import build_oms_list
 
 network_file_name = Path(__file__).parent.parent / 'tests/data/testTopology_expected.json'
 service_file_name = Path(__file__).parent.parent / 'tests/data/testTopology_testservices.json'
@@ -29,10 +30,9 @@ eqpt_library_name = Path(__file__).parent.parent / 'tests/data/eqpt_config.json'
 @pytest.mark.parametrize("eqpt", [eqpt_library_name])
 @pytest.mark.parametrize("serv",[service_file_name])
 def test_disjunction(net,eqpt,serv):
-    data = load_requests(serv,eqpt)
+    data = load_requests(serv, eqpt, bidir=False)
     equipment = load_equipment(eqpt)
     network = load_network(net,equipment)
-
     # Build the network once using the default power defined in SI in eqpt config
     # power density : db2linp(ower_dbm": 0)/power_dbm": 0 * nb channels as defined by
     # spacing, f_min and f_max 
@@ -41,6 +41,7 @@ def test_disjunction(net,eqpt,serv):
     p_total_db = p_db + lin2db(automatic_nch(equipment['SI']['default'].f_min,\
         equipment['SI']['default'].f_max, equipment['SI']['default'].spacing))
     build_network(network, equipment, p_db, p_total_db)
+    build_oms_list(network, equipment)
 
     rqs = requests_from_json(data, equipment)
     rqs = correct_route_list(network, rqs)
@@ -56,7 +57,7 @@ def test_disjunction(net,eqpt,serv):
         rqs_id_list = [r.request_id for r in rqs]
         p1 = pths[rqs_id_list.index(e[0])][1:-1]
         p2 = pths[rqs_id_list.index(e[1])][1:-1]
-        if isdisjoint(p1,p2) + isdisjoint(p1,find_reversed_path(p2, network)) > 0:
+        if isdisjoint(p1, p2) + isdisjoint(p1, find_reversed_path(p2)) > 0:
             test = False
             print(f'Computed path (roadms):{[e.uid for e in p1  if isinstance(e, Roadm)]}\n')
             print(f'Computed path (roadms):{[e.uid for e in p2  if isinstance(e, Roadm)]}\n')
@@ -68,7 +69,7 @@ def test_disjunction(net,eqpt,serv):
 @pytest.mark.parametrize("eqpt", [eqpt_library_name])
 @pytest.mark.parametrize("serv",[service_file_name])
 def test_does_not_loop_back(net,eqpt,serv):
-    data = load_requests(serv,eqpt)
+    data = load_requests(serv, eqpt, bidir=False)
     equipment = load_equipment(eqpt)
     network = load_network(net,equipment)
 
@@ -80,6 +81,7 @@ def test_does_not_loop_back(net,eqpt,serv):
     p_total_db = p_db + lin2db(automatic_nch(equipment['SI']['default'].f_min,\
         equipment['SI']['default'].f_max, equipment['SI']['default'].spacing))
     build_network(network, equipment, p_db, p_total_db)
+    build_oms_list(network, equipment)
 
     rqs = requests_from_json(data, equipment)
     rqs = correct_route_list(network, rqs)

tests/test_parser.py

@@ -21,6 +21,7 @@ from os import unlink
 from pandas import read_csv
 import pytest
 from tests.compare import compare_networks, compare_services
+from copy import deepcopy
 from gnpy.core.utils import lin2db
 from gnpy.core.network import save_network, build_network
 from gnpy.core.convert import convert_file
@@ -29,6 +30,8 @@ from gnpy.core.equipment import load_equipment, automatic_nch
 from gnpy.core.network import load_network
 from gnpy.core.request import (jsontocsv, requests_aggregation,
                                compute_path_dsjctn, Result_element)
+from gnpy.core.spectrum_assignment import build_oms_list, pth_assign_spectrum
+from gnpy.core.exceptions import ServiceError
 from examples.path_requests_run import (requests_from_json, disjunctions_from_json,
                                         correct_route_list, correct_disjn,
                                         compute_path_with_disjunction)
@@ -147,9 +150,9 @@ def test_auto_design_generation_fromjson(json_input, expected_json_output):
     assert not results.connections.different
 
 # test services creation
-
 @pytest.mark.parametrize('xls_input,expected_json_output', {
     DATA_DIR / 'testTopology.xls':     DATA_DIR / 'testTopology_services_expected.json',
+    DATA_DIR / 'testService.xls':     DATA_DIR / 'testService_services_expected.json'
     }.items())
 def test_excel_service_json_generation(xls_input, expected_json_output):
     """ test services creation
@@ -172,6 +175,8 @@ def test_excel_service_json_generation(xls_input, expected_json_output):
     assert not results.synchronizations.extra
     assert not results.synchronizations.different
 
+    # TODO verify that requested bandwidth is not zero !
+
 # test xls answers creation
 @pytest.mark.parametrize('json_input, csv_output', {
     DATA_DIR / 'testTopology_response.json':     DATA_DIR / 'testTopology_response',
@@ -206,12 +211,18 @@ def test_csv_response_generation(json_input, csv_output):
     #  'SNR-bandwidth',
     #  'baud rate (Gbaud)',
     #  'input power (dBm)',
-    #  'path'
+    #  'path',
+    #  'spectrum (N,M)',
+    #  'reversed path OSNR-0.1nm',
+    #  'reversed path SNR-0.1nm',
+    #  'reversed path SNR-bandwidth'
     # ]
 
     resp = read_csv(csv_filename)
+    print(resp)
     unlink(csv_filename)
     expected_resp = read_csv(expected_csv_filename)
+    print(expected_resp)
     resp_header = list(resp.head(0))
     expected_resp_header = list(expected_resp.head(0))
     # check that headers are the same
@@ -240,23 +251,24 @@ def compare_response(exp_resp, act_resp):
     print(act_resp)
     test = True
     for key in act_resp.keys():
-        print(key)
         if not key in exp_resp.keys():
-            print(key)
+            print(f'{key} is not expected')
             return False
         if isinstance(act_resp[key], dict):
             test = compare_response(exp_resp[key], act_resp[key])
     if test:
         for key in exp_resp.keys():
             if not key in act_resp.keys():
-                print(key)
+                print(f'{key} is expected')
                 return False
             if isinstance(exp_resp[key], dict):
                 test = compare_response(exp_resp[key], act_resp[key])
+
     # at this point exp_resp and act_resp have the same keys. Check if their values are the same
     for key in act_resp.keys():
         if not isinstance(act_resp[key], dict):
             if exp_resp[key] != act_resp[key]:
+                print(f'expected value :{exp_resp[key]}\n actual value: {act_resp[key]}')
                 return False
     return test
 
@@ -269,6 +281,9 @@ def test_json_response_generation(xls_input, expected_response_file):
     """ tests if json response is correctly generated for all combinations of requests
     """
     data = convert_service_sheet(xls_input, eqpt_filename)
+    # change one of the request with bidir option to cover bidir case as well
+    data['path-request'][2]['bidirectional'] = True
+
     equipment = load_equipment(eqpt_filename)
     network = load_network(xls_input, equipment)
     p_db = equipment['SI']['default'].power_dbm
@@ -276,23 +291,56 @@ def test_json_response_generation(xls_input, expected_response_file):
     p_total_db = p_db + lin2db(automatic_nch(equipment['SI']['default'].f_min,\
         equipment['SI']['default'].f_max, equipment['SI']['default'].spacing))
     build_network(network, equipment, p_db, p_total_db)
+    oms_list = build_oms_list(network, equipment)
     rqs = requests_from_json(data, equipment)
     rqs = correct_route_list(network, rqs)
     dsjn = disjunctions_from_json(data)
     dsjn = correct_disjn(dsjn)
     rqs, dsjn = requests_aggregation(rqs, dsjn)
     pths = compute_path_dsjctn(network, equipment, rqs, dsjn)
-    propagatedpths = compute_path_with_disjunction(network, equipment, rqs, pths)
+    propagatedpths, reversed_pths, reversed_propagatedpths = \
+        compute_path_with_disjunction(network, equipment, rqs, pths)
+    pth_assign_spectrum(pths, rqs, oms_list, reversed_pths)
+
     result = []
     for i, pth in enumerate(propagatedpths):
-        result.append(Result_element(rqs[i], pth))
+        # test ServiceError handling : when M is zero at this point, the
+        # json result should not be created if there is no blocking reason
+        if i == 1:
+            my_rq = deepcopy(rqs[i])
+            my_rq.M = 0
+            with pytest.raises(ServiceError):
+                Result_element(my_rq, pth, reversed_propagatedpths[i]).json
+
+            my_rq.blocking_reason = 'NO_SPECTRUM'
+            Result_element(my_rq, pth, reversed_propagatedpths[i]).json
+
+        result.append(Result_element(rqs[i], pth, reversed_propagatedpths[i]))
+
     temp = {
         'response': [n.json for n in result]
     }
-    # load expected result and compare keys
+    # load expected result and compare keys and values
-    # (not values at this stage)
+
     with open(expected_response_file) as jsonfile:
         expected = load(jsonfile)
+        # since we changes bidir attribute of request#2, need to add the corresponding
+        # metric in response
 
     for i, response in enumerate(temp['response']):
-        assert compare_response(expected['response'][i], response)
+        if i == 2:
+            # compare response must be False because z-a metric is missing
+            # (request with bidir option to cover bidir case)
+            assert not compare_response(expected['response'][i], response)
+            print(f'response {response["response-id"]} should not match')
+            expected['response'][2]['path-properties']['z-a-path-metric'] = [
+                {'metric-type': 'SNR-bandwidth', 'accumulative-value': 22.809999999999999},
+                {'metric-type': 'SNR-0.1nm', 'accumulative-value': 26.890000000000001},
+                {'metric-type': 'OSNR-bandwidth', 'accumulative-value': 26.239999999999998},
+                {'metric-type': 'OSNR-0.1nm', 'accumulative-value': 30.32},
+                {'metric-type': 'reference_power', 'accumulative-value': 0.0012589254117941673},
+                {'metric-type': 'path_bandwidth', 'accumulative-value': 60000000000.0}]
+            # test should be OK now
+        else:
+            assert compare_response(expected['response'][i], response)
+            print(f'response {response["response-id"]} is not correct')

tests/test_science_utils.py

@@ -0,0 +1,49 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+# @Author: Alessio Ferrari
+"""
+checks that RamanFiber propagates properly the spectral information. In this way, also the RamanSolver and the NliSolver
+ are tested.
+"""
+
+import json
+from pandas import read_csv
+from numpy.testing import assert_allclose
+from gnpy.core.info import create_input_spectral_information
+from gnpy.core.elements import RamanFiber
+from gnpy.core.network import load_sim_params
+from pathlib import Path
+TEST_DIR = Path(__file__).parent
+
+def test_raman_fiber():
+    """ Test the accuracy of propagating the RamanFiber.
+    """
+    # spectral information generation
+    power = 1e-3
+    with open(TEST_DIR / 'data' / 'eqpt_config.json', 'r') as file:
+        eqpt_params = json.load(file)
+    spectral_info_params = eqpt_params['SI'][0]
+    spectral_info_params.pop('power_dbm')
+    spectral_info_params.pop('power_range_db')
+    spectral_info_params.pop('tx_osnr')
+    spectral_info_params.pop('sys_margins')
+    spectral_info_input = create_input_spectral_information(power=power, **spectral_info_params)
+
+    # RamanFiber
+    with open(TEST_DIR / 'data' / 'raman_fiber_config.json', 'r') as file:
+        raman_fiber_params = json.load(file)
+    sim_params = load_sim_params(TEST_DIR / 'data' / 'sim_params.json')
+    fiber = RamanFiber(**raman_fiber_params)
+    fiber.sim_params = sim_params
+
+    # propagation
+    spectral_info_out = fiber(spectral_info_input)
+
+    p_signal = [carrier.power.signal for carrier in spectral_info_out.carriers]
+    p_ase = [carrier.power.ase for carrier in spectral_info_out.carriers]
+    p_nli = [carrier.power.nli for carrier in spectral_info_out.carriers]
+
+    expected_results = read_csv(TEST_DIR / 'data' / 'expected_results_science_utils.csv')
+    assert_allclose(p_signal, expected_results['signal'], rtol=1e-3)
+    assert_allclose(p_ase, expected_results['ase'], rtol=1e-3)
+    assert_allclose(p_nli, expected_results['nli'], rtol=1e-3)