Test-Driven Python Development

Appendix B. Working with Older Python Versions

This book has been written for Python 3.4. The version of unittest that comes with the Python 2.x standard library is an older version that doesn't support all the features that we discussed in this book. Additionally, the mock library was only made a part of the standard library from Python 3.3 onward.

Fortunately, all the features present in the newer versions of Python have been backported under the unittest2 library. We can install this version from PyPi with the following command:

pip install unittest2

Once installed, we have to use the unittest2 library in all references like the following:

import unittest2

class StockTest(unittest2.TestCase):
    ...

With these changes, we will be able to use all the ...