Fix Python codegen in specific additionalProperties case. (#17659)

* Fix Python codegen is specific additionalProperties case.

* Add generated test files.

* Apply fix to AbstractPythonPydanticV1Codegen.java.

samples/openapi3/client/petstore/python-pydantic-v1-aiohttp/test/test_input_all_of.py

@@ -0,0 +1,56 @@
+# coding: utf-8
+
+"""
+    OpenAPI Petstore
+
+    This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+
+    The version of the OpenAPI document: 1.0.0
+    Generated by OpenAPI Generator (https://openapi-generator.tech)
+
+    Do not edit the class manually.
+"""  # noqa: E501
+
+
+import unittest
+import datetime
+
+from petstore_api.models.input_all_of import InputAllOf  # noqa: E501
+
+class TestInputAllOf(unittest.TestCase):
+    """InputAllOf unit test stubs"""
+
+    def setUp(self):
+        pass
+
+    def tearDown(self):
+        pass
+
+    def make_instance(self, include_optional) -> InputAllOf:
+        """Test InputAllOf
+            include_option is a boolean, when False only required
+            params are included, when True both required and
+            optional params are included """
+        # uncomment below to create an instance of `InputAllOf`
+        """
+        model = InputAllOf()  # noqa: E501
+        if include_optional:
+            return InputAllOf(
+                some_data = {
+                    'key' : petstore_api.models.tag.Tag(
+                        id = 56, 
+                        name = '', )
+                    }
+            )
+        else:
+            return InputAllOf(
+        )
+        """
+
+    def testInputAllOf(self):
+        """Test InputAllOf"""
+        # inst_req_only = self.make_instance(include_optional=False)
+        # inst_req_and_optional = self.make_instance(include_optional=True)
+
+if __name__ == '__main__':
+    unittest.main()

samples/openapi3/client/petstore/python-pydantic-v1-aiohttp/test/test_property_map.py

@@ -0,0 +1,56 @@
+# coding: utf-8
+
+"""
+    OpenAPI Petstore
+
+    This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+
+    The version of the OpenAPI document: 1.0.0
+    Generated by OpenAPI Generator (https://openapi-generator.tech)
+
+    Do not edit the class manually.
+"""  # noqa: E501
+
+
+import unittest
+import datetime
+
+from petstore_api.models.property_map import PropertyMap  # noqa: E501
+
+class TestPropertyMap(unittest.TestCase):
+    """PropertyMap unit test stubs"""
+
+    def setUp(self):
+        pass
+
+    def tearDown(self):
+        pass
+
+    def make_instance(self, include_optional) -> PropertyMap:
+        """Test PropertyMap
+            include_option is a boolean, when False only required
+            params are included, when True both required and
+            optional params are included """
+        # uncomment below to create an instance of `PropertyMap`
+        """
+        model = PropertyMap()  # noqa: E501
+        if include_optional:
+            return PropertyMap(
+                some_data = {
+                    'key' : petstore_api.models.tag.Tag(
+                        id = 56, 
+                        name = '', )
+                    }
+            )
+        else:
+            return PropertyMap(
+        )
+        """
+
+    def testPropertyMap(self):
+        """Test PropertyMap"""
+        # inst_req_only = self.make_instance(include_optional=False)
+        # inst_req_and_optional = self.make_instance(include_optional=True)
+
+if __name__ == '__main__':
+    unittest.main()