PEP 485: A Function for Testing Approximate Equality
TL;DR
PEP 485 introduced math.isclose() to solve the fundamental problem of comparing floating-point numbers by testing if two values are “approximately equal” rather than exactly equal.
Posts on Testing
Unittest Module: Built-in Testing Framework for Python
TL;DR
The unittest module provides TestCase classes, assertion methods, test discovery, and mock objects for comprehensive unit testing with setUp/tearDown methods and test runners.