Missing license information

[peterjc]

See e.g. https://help.github.com/articles/open-source-licensing/

Traditionally (unless opting for the GNU GPL) use a file named LICENSE, LICENSE.txt or LICENSE.md etc if using a markup language, and put put the name of the license in the Python file header and the main README file. And in your setup.py so this information appears on PyPI

I would suggest picking an open source licence from https://opensource.org/ but as USA government funded work you might be restricted to explicitly dedicating this to the public domain. See e.g. https://opensource.org/faq