A flake8_tuple plugin checks for (probably) unintended one element tuples like:

foo = 123,

Install with pip:

$ pip install flake8-tuple

You can check that flake8 has picked it up by looking for flake8-tuple in the output of --version:

$ flake8 --version
2.6.2 (pycodestyle: 2.0.0, flake8-tuple: 0.2.10, pyflakes: 1.2.3, mccabe: 0.5.0) CPython 2.7.11+ on Linux

This plugin add new flake8 warning:

• T801: one element tuple.

• Python 3.x (tested on 3.4, 3.5, 3.6 and 3.7)
• flake8 or pycodestyle

BSD license