Creating a Python Module
This is, much like quantum physics, and the universe, work-in-progress.
Here are some very subjective recommendations how to create and publish a Python module.
Use the NumPy Docstring Standard.
.. todo:: coverage tool, probably py.test extension
There are many possibilities, one of them is the MIT license:
Copyright (c) <year> <copyright holders> Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
If your module consists of only one source file, this can be included in the top as a comment. This makes it easy for others to take just the one file and put it into their own project while still keeping the copyright notice.
If the module consists of several source files, this is not necessary. It's enough to put the copyright notice and the license text into a file LICENSE in the main directory (you should have this file in any case).