PyTest
In plain terms
A popular, flexible testing framework for Python.
Going deeper
pytest makes Python testing concise with simple assert statements, powerful fixtures, and rich plugins. It's the de facto Python test tool.
Under the hood
Fixtures and parametrization reduce boilerplate; a large plugin ecosystem extends it.
Examples
Python unit/integration tests, fixtures, parametrize, plugins, CI.
Think of it like...
Like a versatile, low-friction toolkit for checking your Python code.