Add post processing to files generated by Python generators (#1072)

* add post process file to python generators

* update python samples with yapf

* revert sample change

samples/client/petstore/python/.openapi-generator/VERSION

@@ -1 +1 @@
-3.2.2-SNAPSHOT
+3.3.0-SNAPSHOT

samples/client/petstore/python/docs/MapTest.md

@@ -6,7 +6,7 @@ Name | Type | Description | Notes
 **map_map_of_string** | **dict(str, dict(str, str))** |  | [optional] 
 **map_of_enum_string** | **dict(str, str)** |  | [optional] 
 **direct_map** | **dict(str, bool)** |  | [optional] 
-**indirect_map** | [**StringBooleanMap**](StringBooleanMap.md) |  | [optional] 
+**indirect_map** | **dict(str, bool)** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 

samples/client/petstore/python/petstore_api/models/map_test.py

@@ -34,7 +34,7 @@ class MapTest(object):
         'map_map_of_string': 'dict(str, dict(str, str))',
         'map_of_enum_string': 'dict(str, str)',
         'direct_map': 'dict(str, bool)',
-        'indirect_map': 'StringBooleanMap'
+        'indirect_map': 'dict(str, bool)'
     }
 
     attribute_map = {
@@ -138,7 +138,7 @@ class MapTest(object):
 
 
         :return: The indirect_map of this MapTest.  # noqa: E501
-        :rtype: StringBooleanMap
+        :rtype: dict(str, bool)
         """
         return self._indirect_map
 
@@ -148,7 +148,7 @@ class MapTest(object):
 
 
         :param indirect_map: The indirect_map of this MapTest.  # noqa: E501
-        :type: StringBooleanMap
+        :type: dict(str, bool)
         """
 
         self._indirect_map = indirect_map