writing json results from path_requests_run.py into csv

Signed-off-by: EstherLerouzic <esther.lerouzic@orange.com>

examples/write_path_jsontocsv.py

@@ -0,0 +1,93 @@
+#!/usr/bin/env python3
+# TelecomInfraProject/gnpy/examples
+# Module name : write_path_jsontoxls.py
+# Version : 
+# License : BSD 3-Clause Licence
+# Copyright (c) 2018, Telecom Infra Project
+
+"""
+@author: esther.lerouzic
+read json path result file in accordance with:
+    Yang model for requesting Path Computation
+    draft-ietf-teas-yang-path-computation-01.txt. 
+and write results in an CSV file
+
+"""
+
+from sys import exit
+from csv import writer
+from argparse import ArgumentParser
+from pathlib import Path
+from json import dumps, loads
+from gnpy.core.equipment  import load_equipment
+from gnpy.core.utils import lin2db
+
+START_LINE = 5
+
+
+parser = ArgumentParser(description = 'A function that writes json path results in an excel sheet.')
+parser.add_argument('filename', nargs='?', type = Path)
+parser.add_argument('eqpt_filename', nargs='?', type = Path)
+
+parser.add_argument('output_filename', nargs='?', type = Path)
+
+if __name__ == '__main__':
+    args = parser.parse_args()
+    print(f'coucou {args.output_filename}')
+    with open(args.output_filename,"w") as file :
+        mywriter = writer(file)
+        mywriter.writerow(('path-id','source','destination','transponder-type',\
+            'transponder-mode','baud rate (Gbaud)', 'input power (dBm)','path','OSNR@bandwidth','OSNR@0.1nm','SNR@bandwidth','SNR@0.1nm','Pass?'))
+
+        with open(args.filename) as f:
+            json_data = loads(f.read())
+            equipment = load_equipment(args.eqpt_filename)
+            tspjsondata = equipment['Transceiver']
+            #print(tspjsondata)
+            for p in json_data['path']:
+                path_id     = int(p['path-id'])
+                source      = p['path-properties']['path-route-objects'][0]\
+                ['path-route-object']['unnumbered-hop']['node-id']
+                destination = p['path-properties']['path-route-objects'][-1]\
+                ['path-route-object']['unnumbered-hop']['node-id']
+                pth        = ' | '.join([ e['path-route-object']['unnumbered-hop']['node-id'] 
+                         for e in p['path-properties']['path-route-objects']])
+
+                [tsp,mode] = p['path-properties']['path-route-objects'][0]\
+                ['path-route-object']['unnumbered-hop']['hop-type'].split(' - ')
+                
+                # find the min  acceptable OSNR, baud rate from the eqpt library based on tsp (tupe) and mode (format)
+                try:
+                    [minosnr, baud_rate] = next([m['OSNR'] , m['baud_rate']]  
+                        for m in equipment['Transceiver'][tsp].mode if  m['format']==mode)
+    
+                # for debug
+                # print(f'coucou {baud_rate}')
+                except IndexError:
+                    msg = f'could not find tsp : {self.tsp} with mode: {self.tsp_mode} in eqpt library'
+                    
+                    raise ValueError(msg)
+                output_snr = next(e['accumulative-value'] 
+                    for e in p['path-properties']['path-metric'] if e['metric-type'] == 'SNR@0.1nm')
+                output_snrbandwidth = next(e['accumulative-value'] 
+                    for e in p['path-properties']['path-metric'] if e['metric-type'] == 'SNR@bandwidth')
+                output_osnr = next(e['accumulative-value'] 
+                    for e in p['path-properties']['path-metric'] if e['metric-type'] == 'OSNR@0.1nm')
+                output_osnrbandwidth = next(e['accumulative-value'] 
+                    for e in p['path-properties']['path-metric'] if e['metric-type'] == 'OSNR@bandwidth')
+                power = next(e['accumulative-value'] 
+                    for e in p['path-properties']['path-metric'] if e['metric-type'] == 'reference_power')
+                mywriter.writerow((path_id,
+                    source,
+                    destination,
+                    tsp,
+                    mode,
+                    baud_rate*1e-9,
+                    round(lin2db(power)+30,2),
+                    pth,
+                    output_osnrbandwidth,
+                    output_osnr,
+                    output_snrbandwidth,
+                    output_snr,
+                    output_snr >= minosnr
+                    ))