[Python] Improve model equality implementation (#4663)

* [Python] Improve model equality implementation

The model equality implementation template blindly tried accessing the
`__dict__` attribute of the variable to compare equality against. This
attribute does not exist for a lot of Python built-in types (`None`,
`str` etc.) and the equality check would simply crash.

This adds a simple guard to only continue with equality check if the
variable to compare is an instance of the model being compared against.

* Remove wrong auto-update of Python requirements

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

@@ -127,6 +127,9 @@ class AdditionalPropertiesClass(object):
         """
         Returns true if both objects are equal
         """
+        if not isinstance(other, AdditionalPropertiesClass):
+            return False
+
         return self.__dict__ == other.__dict__
 
     def __ne__(self, other):

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

@@ -129,6 +129,9 @@ class Animal(object):
         """
         Returns true if both objects are equal
         """
+        if not isinstance(other, Animal):
+            return False
+
         return self.__dict__ == other.__dict__
 
     def __ne__(self, other):

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

@@ -81,6 +81,9 @@ class AnimalFarm(object):
         """
         Returns true if both objects are equal
         """
+        if not isinstance(other, AnimalFarm):
+            return False
+
         return self.__dict__ == other.__dict__
 
     def __ne__(self, other):

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

@@ -151,6 +151,9 @@ class ApiResponse(object):
         """
         Returns true if both objects are equal
         """
+        if not isinstance(other, ApiResponse):
+            return False
+
         return self.__dict__ == other.__dict__
 
     def __ne__(self, other):

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

@@ -103,6 +103,9 @@ class ArrayOfArrayOfNumberOnly(object):
         """
         Returns true if both objects are equal
         """
+        if not isinstance(other, ArrayOfArrayOfNumberOnly):
+            return False
+
         return self.__dict__ == other.__dict__
 
     def __ne__(self, other):

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

@@ -103,6 +103,9 @@ class ArrayOfNumberOnly(object):
         """
         Returns true if both objects are equal
         """
+        if not isinstance(other, ArrayOfNumberOnly):
+            return False
+
         return self.__dict__ == other.__dict__
 
     def __ne__(self, other):

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

@@ -151,6 +151,9 @@ class ArrayTest(object):
         """
         Returns true if both objects are equal
         """
+        if not isinstance(other, ArrayTest):
+            return False
+
         return self.__dict__ == other.__dict__
 
     def __ne__(self, other):

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

@@ -225,6 +225,9 @@ class Capitalization(object):
         """
         Returns true if both objects are equal
         """
+        if not isinstance(other, Capitalization):
+            return False
+
         return self.__dict__ == other.__dict__
 
     def __ne__(self, other):

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

@@ -153,6 +153,9 @@ class Cat(object):
         """
         Returns true if both objects are equal
         """
+        if not isinstance(other, Cat):
+            return False
+
         return self.__dict__ == other.__dict__
 
     def __ne__(self, other):

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

@@ -127,6 +127,9 @@ class Category(object):
         """
         Returns true if both objects are equal
         """
+        if not isinstance(other, Category):
+            return False
+
         return self.__dict__ == other.__dict__
 
     def __ne__(self, other):

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

@@ -103,6 +103,9 @@ class ClassModel(object):
         """
         Returns true if both objects are equal
         """
+        if not isinstance(other, ClassModel):
+            return False
+
         return self.__dict__ == other.__dict__
 
     def __ne__(self, other):

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

@@ -103,6 +103,9 @@ class Client(object):
         """
         Returns true if both objects are equal
         """
+        if not isinstance(other, Client):
+            return False
+
         return self.__dict__ == other.__dict__
 
     def __ne__(self, other):

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

@@ -153,6 +153,9 @@ class Dog(object):
         """
         Returns true if both objects are equal
         """
+        if not isinstance(other, Dog):
+            return False
+
         return self.__dict__ == other.__dict__
 
     def __ne__(self, other):

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

@@ -140,6 +140,9 @@ class EnumArrays(object):
         """
         Returns true if both objects are equal
         """
+        if not isinstance(other, EnumArrays):
+            return False
+
         return self.__dict__ == other.__dict__
 
     def __ne__(self, other):

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

@@ -81,6 +81,9 @@ class EnumClass(object):
         """
         Returns true if both objects are equal
         """
+        if not isinstance(other, EnumClass):
+            return False
+
         return self.__dict__ == other.__dict__
 
     def __ne__(self, other):

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

@@ -193,6 +193,9 @@ class EnumTest(object):
         """
         Returns true if both objects are equal
         """
+        if not isinstance(other, EnumTest):
+            return False
+
         return self.__dict__ == other.__dict__
 
     def __ne__(self, other):

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

@@ -425,6 +425,9 @@ class FormatTest(object):
         """
         Returns true if both objects are equal
         """
+        if not isinstance(other, FormatTest):
+            return False
+
         return self.__dict__ == other.__dict__
 
     def __ne__(self, other):

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

@@ -127,6 +127,9 @@ class HasOnlyReadOnly(object):
         """
         Returns true if both objects are equal
         """
+        if not isinstance(other, HasOnlyReadOnly):
+            return False
+
         return self.__dict__ == other.__dict__
 
     def __ne__(self, other):

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

@@ -103,6 +103,9 @@ class List(object):
         """
         Returns true if both objects are equal
         """
+        if not isinstance(other, List):
+            return False
+
         return self.__dict__ == other.__dict__
 
     def __ne__(self, other):

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

@@ -134,6 +134,9 @@ class MapTest(object):
         """
         Returns true if both objects are equal
         """
+        if not isinstance(other, MapTest):
+            return False
+
         return self.__dict__ == other.__dict__
 
     def __ne__(self, other):

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

@@ -151,6 +151,9 @@ class MixedPropertiesAndAdditionalPropertiesClass(object):
         """
         Returns true if both objects are equal
         """
+        if not isinstance(other, MixedPropertiesAndAdditionalPropertiesClass):
+            return False
+
         return self.__dict__ == other.__dict__
 
     def __ne__(self, other):

samples/client/petstore/python/petstore_api/models/model_200_response.py

@@ -127,6 +127,9 @@ class Model200Response(object):
         """
         Returns true if both objects are equal
         """
+        if not isinstance(other, Model200Response):
+            return False
+
         return self.__dict__ == other.__dict__
 
     def __ne__(self, other):

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

@@ -103,6 +103,9 @@ class ModelReturn(object):
         """
         Returns true if both objects are equal
         """
+        if not isinstance(other, ModelReturn):
+            return False
+
         return self.__dict__ == other.__dict__
 
     def __ne__(self, other):

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

@@ -177,6 +177,9 @@ class Name(object):
         """
         Returns true if both objects are equal
         """
+        if not isinstance(other, Name):
+            return False
+
         return self.__dict__ == other.__dict__
 
     def __ne__(self, other):

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

@@ -103,6 +103,9 @@ class NumberOnly(object):
         """
         Returns true if both objects are equal
         """
+        if not isinstance(other, NumberOnly):
+            return False
+
         return self.__dict__ == other.__dict__
 
     def __ne__(self, other):

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

@@ -231,6 +231,9 @@ class Order(object):
         """
         Returns true if both objects are equal
         """
+        if not isinstance(other, Order):
+            return False
+
         return self.__dict__ == other.__dict__
 
     def __ne__(self, other):

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

@@ -81,6 +81,9 @@ class OuterEnum(object):
         """
         Returns true if both objects are equal
         """
+        if not isinstance(other, OuterEnum):
+            return False
+
         return self.__dict__ == other.__dict__
 
     def __ne__(self, other):

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

@@ -235,6 +235,9 @@ class Pet(object):
         """
         Returns true if both objects are equal
         """
+        if not isinstance(other, Pet):
+            return False
+
         return self.__dict__ == other.__dict__
 
     def __ne__(self, other):

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

@@ -127,6 +127,9 @@ class ReadOnlyFirst(object):
         """
         Returns true if both objects are equal
         """
+        if not isinstance(other, ReadOnlyFirst):
+            return False
+
         return self.__dict__ == other.__dict__
 
     def __ne__(self, other):

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

@@ -103,6 +103,9 @@ class SpecialModelName(object):
         """
         Returns true if both objects are equal
         """
+        if not isinstance(other, SpecialModelName):
+            return False
+
         return self.__dict__ == other.__dict__
 
     def __ne__(self, other):

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

@@ -127,6 +127,9 @@ class Tag(object):
         """
         Returns true if both objects are equal
         """
+        if not isinstance(other, Tag):
+            return False
+
         return self.__dict__ == other.__dict__
 
     def __ne__(self, other):

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

@@ -273,6 +273,9 @@ class User(object):
         """
         Returns true if both objects are equal
         """
+        if not isinstance(other, User):
+            return False
+
         return self.__dict__ == other.__dict__
 
     def __ne__(self, other):