ImportError: No module named mock

python python-2.7 python-import importerror
Richard Knop picture Richard Knop · Jul 16, 2012 · Viewed 90.2k times · Source

So I am trying to use unittest.mock to mock some of my methods in my unit tests. I do:

from unittest.mock import MagicMock
f = open("data/static/mock_ffprobe_response")
subprocess.check_output = MagicMock(return_value=f.read())
f.close()

But I am getting:

ImportError: No module named mock

I tried:

pip install mock

It's still not working.

Answer

DSM picture DSM · Jul 16, 2012

unittest is a built-in module; mock is an external library (pre-3.3 betas, anyway). After installing mock via pip install, you import it not by using

from unittest.mock import MagicMock

but

from mock import MagicMock

Edit: mock has been included in the unittest module (since Python3.3), and can be imported by import unittest.mock.

Related questions

Why does using from __future__ import print_function breaks Python2-style print?

I am new at programming with python, and I am trying to print out with a separator and end but it is still giving me a syntax error. I am using python 2.7. Here is my code: from __future__ import print_…

Read More
What does from __future__ import absolute_import actually do?

I have answered a question regarding absolute imports in Python, which I thought I understood based on reading the Python 2.5 changelog and accompanying PEP. However, upon installing Python 2.5 and attempting to craft an example of properly using from __future__ import …

Read More
How to solve import error for pandas?

I installed Anaconda with python 2.7.7. However, whenever I run "import pandas" I get the error: "ImportError: C extension: y not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_…

Read More