The ABC of Python decorators. Functions with an @ symbol. Let’s try a combination of the two previous concepts: a function that takes another function and defines a function.

The best parallel processing libraries for Python. Ray: Parallelizes and distributes AI and machine learning workloads across CPUs, machines, and GPUs.; Dask: Parallelizes Python data science ...

Functions written in Cython only using Python’s def keyword are visible to other Python code, but incur a performance penalty. The cython.cfunc decorator indicates the function in question is a ...

$ python decorator_test.py Function calculate_squares being called at 2018-08-23 12:39:02.112904 Took 2.5019338130950928 seconds Dealing with parameters. In the example above, ...

The setup and teardown do not have to be just for the test function. Scope of the setup may differ from a test function to as large as the whole test session. This means the setup-teardown is executed ...

Improve your Python testing even more. In my last two articles, I introduced pytest, a library for testing Python code (see "Testing Your Code with Python's pytest" Part I and Part II). pytest has ...