documentation of parameter type as well

ess/lib_tw.py

@@ -36,9 +36,13 @@ class LATTICE:
     def __init__(self,file_name_lat,file_name_fmap=[],freq=352.21,gamma=1.0):
         '''
         :param file_name_lat: name of lattice file
-        :param file_name_fmap: list of file map files
+        :type file_name_lat: str
+        :param file_name_fmap: list of file map file(-s)
+        :type file_name_fmap: list or str
         :param freq: RF frequency
+        :type freq: float
         :param gamma: relativistic gamma
+        :type gamma: float
         '''
 
         # In case file_name_fmap is str