Better logic to handle tags with special characters (#6466)

* better logic to handle tag with special characters

* update test cases

* comment out swift test cases

* restore the swift tests

samples/client/petstore/python/test/test_another_fake_api.py

@@ -0,0 +1,44 @@
+# coding: utf-8
+
+"""
+    Swagger 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: \" \\
+
+    OpenAPI spec version: 1.0.0
+    Contact: apiteam@swagger.io
+    Generated by: https://github.com/swagger-api/swagger-codegen.git
+"""
+
+
+from __future__ import absolute_import
+
+import os
+import sys
+import unittest
+
+import petstore_api
+from petstore_api.rest import ApiException
+from petstore_api.apis.another_fake_api import AnotherFakeApi
+
+
+class TestAnotherFakeApi(unittest.TestCase):
+    """ AnotherFakeApi unit test stubs """
+
+    def setUp(self):
+        self.api = petstore_api.apis.another_fake_api.AnotherFakeApi()
+
+    def tearDown(self):
+        pass
+
+    def test_test_special_tags(self):
+        """
+        Test case for test_special_tags
+
+        To test special tags
+        """
+        pass
+
+
+if __name__ == '__main__':
+    unittest.main()