pre-commit git hook for testing pep8 conformity

pre-commit

#! /usr/bin/env bash

if python -m pycodestyle {,**/}*.py | grep [a-z,0-9];
then
  exit 1;
else
  exit 0;
fi

pre-commit (python3 specific)

#! /usr/bin/env bash

if python3 -m pycodestyle {,**/}*.py | grep [a-z,0-9];
then
  exit 1;
else
  exit 0;
fi

I added 'python -m' before the pycodestyle for easier portability on different os. If only one version of python is installed, the pre-commit file is suitable. Otherwise, for systems with both python2 & python3, the python3 specific pre-commit will be necessary.