Change reserved word handling in python client.

* First, remove the beginning underscores.
* Then, append underscore if the var is reserved word or number.

modules/swagger-codegen/src/main/resources/python/api_client.mustache

@@ -202,11 +202,9 @@ class ApiClient(object):
                 # and attributes which value is not None.
                 # Convert attribute name to json key in
                 # model definition for request.
-                obj_dict = {obj.attribute_map[key[1:]]: val
-                            for key, val in iteritems(obj.__dict__)
-                            if key != 'swagger_types'
-                            and key != 'attribute_map'
-                            and val is not None}
+                obj_dict = {obj.attribute_map[attr]: getattr(obj, attr)
+                            for attr, _ in iteritems(obj.swagger_types)
+                            if getattr(obj, attr) is not None}
 
             return {key: self.sanitize_for_serialization(val)
                     for key, val in iteritems(obj_dict)}

modules/swagger-codegen/src/main/resources/python/configuration.mustache

@@ -23,9 +23,9 @@ import urllib3
 try:
     import httplib
 except ImportError:
-    # python3
+    # for python3
     import http.client as httplib
-
+    
 import sys
 import logging
 

modules/swagger-codegen/src/main/resources/python/model.mustache

@@ -86,18 +86,17 @@ class {{classname}}(object):
         """
         result = {}
 
-        for name, prop in iteritems(self.__dict__):
-            if name == "attribute_map" or name == "swagger_types":
-                continue
-            if isinstance(prop, list):
-                result[name[1:]] = list(map(
+        for attr, _ in iteritems(self.swagger_types):
+            value = getattr(self, attr)
+            if isinstance(value, list):
+                result[attr] = list(map(
                     lambda x: x.to_dict() if hasattr(x, "to_dict") else x,
-                    prop
+                    value
                 ))
-            elif hasattr(prop, "to_dict"):
-                result[name[1:]] = prop.to_dict()
+            elif hasattr(value, "to_dict"):
+                result[attr] = value.to_dict()
             else:
-                result[name[1:]] = prop
+                result[attr] = value
 
         return result