STYLE: Avoid conflicts with a Python built-in by following pep8
STYLE: Avoid conflicts with a Python built-in by following pep8

See https://www.python.org/dev/peps/pep-0008/#descriptive-naming-styles
and search for "to avoid conflicts with Python keyword".

Adding a trailing underscore is an accepted way to have a suggestive
variable name without redefining a built-in or colliding with a keyword.

DCBIA-OrthoLab/PickAndPaintExtension