2 ms·

import mpmath.mp as mp Doesn't work in this case because mp isn't a submodule of mpmath. You will get "ModuleNotFoundError: No module named 'mpmath.mp'" The "

import mpmath.mp as mp Doesn't work in this case because mp isn't a submodule of mpmath. You will get "ModuleNotFoundError: No module named 'mpmath.mp'" The "from" is what dives into a module and takes something out. It's not just defining a syntactic macro. You would have to do something closer to this: import mpmath mp = mpmath.mp del mpmath to replace what "from" does.

PurpleRamen 3y ago
That's an implementation-detail. Nothing prevents the import from diving automatically into the file. But doing so would open the door for name-shadowing, as with a package you could have a separate mp.py for import, or a definition of mp in __init__.py. And this would be another confusion for people, and a performance-problem maybe.