D100 - Missing docstring in public module at line 1 col 1
Any idea why im getting this warning.
$ pip list appnope (0.1.0) configparser (3.5.0) decorator (4.0.6) enum34 (1.1.6) flake8 (3.0.4) flake8-docstrings (1.0.2) flake8-polyfill (1.0.1) gnureadline (6.3.3) ipython (4.0.2) ipython-genutils (0.1.0) mccabe (0.5.2) mercurial (3.9.2) path.py (8.1.2) pbr (1.8.1) pep257 (0.7.0) pexpect (4.0.1) pickleshare (0.5) pip (8.1.2) ptyprocess (0.5) pycodestyle (2.0.0) pydocstyle (1.1.1) pyflakes (1.2.3) requests (2.9.1) setuptools (23.1.0) simplegeneric (0.8.1) six (1.10.0) stevedore (1.11.0) traitlets (4.1.0) virtualenv (13.1.2) virtualenv-clone (0.2.6) virtualenvwrapper (4.7.1) wheel (0.26.0)
def product(x, y): return x * y