Heavily inspired by https://github.com/sol/infer-license/ this will provide an API to guess what license a given file represents.

>>> from infer_license import guess_file
>>> print(guess_file("LICENSE"))
License(name='MIT License', shortname='MIT', trove_classifier='License :: OSI Approved :: MIT License')
>>> guess_file("setup.py")
None

There's also a handy infer_license script that takes a filename.

$ infer_license LICENSE
LICENSE: MIT

infer-license is copyright Tim Hatch, and licensed under the MIT license. I am providing code in this repository to you under an open source license. This is my personal repository; the license you receive to my code is from me and not from my employer. See the LICENSE file for details.