Is this the “mock import” you were looking for? No, not quite. It goes in the opposite direction, but the name is correct.
20160922/https://github.com/posener/mock-import
20170201/https://pypi.python.org/pypi/mock-import/0.0.2
Important! It would be useful for my Python package integration tests to use something like this as an external module. Unfortunately, the mentioned module’s scope is a little bit narrower than would be desired. The mock import is only setup to cause imports to pass, not to fail.
On the subject of my Python package, using Sphinx for the documentation may also be another good thing to do.
20170201/http://www.sphinx-doc.org/en/1.5.1/tutorial.html