PyLint is an extensible tool for checking whether Python code satisfies a
specified coding standard. It is similar to PyChecker insofar that it can
perform nearly all tests supported by PyChecker. Pylint, however, can check
many other things such as line-code length, variable name adherence to a coding
standard, whether interfaces defined in the code are actually implemented, and
much more. One can easily extend PyLint with plugins.