The Python unit testing framework, sometimes referred to as “PyUnit,” is a Python language version of JUnit, by Kent Beck and Erich Gamma. JUnit is, in turn, a Java version of Kent’s Smalltalk testing framework. Each is the de facto standard unit testing framework for its respective language. Please refer to https://docs.python.org/2/library/unittest.html for the detail informatin.
The source code is exported from http://pyunit.sourceforge.net/
In this repository, the classes of original source code are moved into different .py files.