10.14 Unit Testing with Docstrings and doctest
A key aspect of software development is testing your code to ensure that it works correctly. Even with extensive testing, however, your code may still contain bugs. According to the famous Dutch computer scientist Edsger Dijkstra, “Testing shows the presence, not the absence of bugs.”17
Module doctest and the testmod Function
The Python Standard Library provides the doctest module to help you test your code and conveniently retest it after you make modifications. When you execute the doctest module’s testmod function ...
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