Add utility method for encoding path variables

Author: Mike Kistler

watson_developer_cloud/watson_service.py

@@ -227,6 +227,10 @@ def _convert_model(val):
             return val._to_dict()
         return val
 
+    @staticmethod
+    def _encode_path_vars(*args):
+        return (requests.utils.quote(x, safe='') for x in args)
+
     @staticmethod
     def _get_error_message(response):
         """