pep8 conformance, comparison to None should use `is` - see https://www.python.org/dev/peps/pep-0008/#id42
pep8 conformance, comparison to None should use `is` - see https://www.python.org/dev/peps/pep-0008/#id42

albfan/cpp-coveralls,eddyxu/cpp-coveralls,eddyxu/cpp-coveralls,albfan/cpp-coveralls