Aspen is a filesystem router for Python web frameworks. See aspen.io for framework wrappers.
aspen is available on GitHub and on PyPI:
$ pip install aspen
We test against 64-bit Python 3.6, 3.7, 3.8 and 3.9 on Linux: 
And we test against 32- and 64-bit Python 3.6, 3.7, 3.8 and 3.9 on Windows: 
aspen is MIT-licensed.