This problem periodically comes up, and generally an unsatisfactory solution
is proposed, the cure is worse than the disease, it's rejected, and we
ignore the problem for another year.
The 1:1 correspondence of modules to files in Python is handy, but sometimes
inconvenient. I would like to be able to write large, complex packages in
Python but constrain the interface that they present, so that users only
have to import one module in order to use them.
What is a good way to do this?