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.