pyflakes VS tox

Pyflakes is a simple program that checks Python source files for errors. It is similar to PyLint but focuses only on errors, not style. This makes it faster and less intrusive than some other tools.

pyflakes

PyFlakes—another bug checker (it only checks for logical errors, not for style, but it works faster);

Flake8: a combination of following linters: PyFlakes, pycodestyle, Ned Batchelder’s McCabe script

Tox is a powerful tool in Python development, primarily used for automating and standardised testing across multiple environments. It’s part of a larger vision of easing the packaging, testing, and release process of Python software. You should consider using tox in the following scenarios if your application needs to run across different Python versions, tox can help ensure your code works consistently across all these versions; If your project has complex dependencies, tox can manage and isolate these dependencies in different environments.

Another less heavyweight solution than Docker is Tox – handy for when you need to test software with multiple different versions of Python.