I am writing a unit test for some library we are working on. This library makes use of requests.post() to perform POST HTTP requests to an external server. Inside my UT, I obviously don't want to contact the real server but to mock the response. To do that, I wrote a function that goes like: def mocked_post(url, headers, data, **kwargs): response = Mock() # Some logic, irrelevant here. return response And I patched this function around my unit test class: @patch('mylib.requests.post', mocked_post) class MyTest(TestCase): def test_foo(self): # Some test logic This is working perfectly. Now I'd like to get the number of calls to my mocked function. I tried mocked_post.call_count but that doesn't exist. I tried to find this property on a lot of different objects (including mylib.requests.post) but no luck so far. How can I access the call_count for this mocked function ? Continue reading...