test — Regression tests package for Python
package contains all regression tests for Python as well as the modules
is used to enhance your tests while
test.regrtest drives the testing suite.
unittest.mock — mock object library
unittest — Unit testing framework
pydoc — Documentation generator and online help system
Python Development Mode
The Python Development Mode introduces additional runtime checks that are too expensive to be enabled by default. It should not be more verbose than the default if the code is correct; new warnings are only emitted when an issue is detected.
typing — Support for type hints
doctest — Test interactive Python examples