The style guide I think it would be best to use is pep8: http://legacy.python.org/dev/peps/pep-0008/
You can get the style checker here: https://pypi.python.org/pypi/pep8
You can get an auto formatter here: https://pypi.python.org/pypi/autopep8/
Tests go in tests/.
Run tests with python setup.py test.
Test runner depends on pytest.
Travis CI checks for pep8 compliance on all code.
If your code doesn't meet pep8 compliance the test suite will report a failure.