added test case for 404 response of python client

samples/client/petstore/python/SwaggerPetstore-python/SwaggerPetstore/rest.py

@@ -1,4 +1,10 @@
 # coding: utf-8
+
+"""
+Credit: this file (rest.py) is modified based on rest.py in Dropbox Python SDK:
+https://www.dropbox.com/developers/core/sdks/python
+"""
+
 import sys
 import io
 import json

samples/client/petstore/python/SwaggerPetstore-python/tests/test_api_exception.py

@@ -0,0 +1,31 @@
+# coding: utf-8
+
+"""
+Run the tests.
+$ pip install nose (optional)
+$ cd SwaggerPetstore-python
+$ nosetests -v
+"""
+
+import os
+import time
+import unittest
+
+import SwaggerPetstore
+from SwaggerPetstore.rest import ApiException
+
+
+class ApiExceptionTests(unittest.TestCase):
+
+    def setUp(self):
+        self.api_client = SwaggerPetstore.ApiClient()
+        self.pet_api = SwaggerPetstore.PetApi(self.api_client)
+
+    def tearDown(self):
+        time.sleep(1)
+
+    def test_404_error(self):
+        self.pet_api.delete_pet(pet_id=1234)
+        
+        with self.assertRaisesRegexp(ApiException, "Pet not found"):
+            self.pet_api.get_pet_by_id(pet_id=1234)