(formerly pep257)
pydocstyle is a static analysis tool for checking compliance with Python docstring conventions.
pydocstyle supports most of PEP 257 out of the box, but it should not be considered a reference implementation.
pydocstyle supports Python 2.7, 3.3, 3.4, 3.5 and pypy.
pip install pydocstyle
$ pydocstyle test.py test.py:18 in private nested class `meta`: D101: Docstring missing test.py:27 in public function `get_user`: D300: Use """triple double quotes""" (found '''-quotes) test:75 in public function `init_database`: D201: No blank lines allowed before function docstring (found 1) ...