add science utils module

gnpy/core/science_utils.py

@@ -0,0 +1,23 @@
+from collections import namedtuple
+
+
+class RamanParameters():
+    def __init__(self, params=None):
+        self.flag_raman = params['flag_raman']
+        self.space_resolution = params['space_resolution']
+        self.tolerance = params['tolerance']
+        self.verbose = params['verbose']
+
+class NLIParameters():
+    def __init__(self, params=None):
+        self.nli_method_name = params['nli_method_name']
+        self.wdm_grid_size = params['wdm_grid_size']
+        self.dispersion_tolerance = params['dispersion_tolerance']
+        self.phase_shift_tollerance = params['phase_shift_tollerance']
+        self.verbose = params['verbose']
+
+class SimParams():
+    def __init__(self, params=None):
+        self.list_of_channels_under_test = params['list_of_channels_under_test']
+        self.raman_params = RamanParameters(params=params['raman_parametes'])
+        self.nli_params = NLIParameters(params=params['nli_parametes'])