Python3 put it in functools, I think. Ah the need for an import would prevent one lining.

Never quite understood that decision

Reduce isn't used much. Things that tend to use reduce in languages like Haskell tend to be built from other primitives in Python.

Instead of reduce, you could use https://docs.python.org/3/library/functions.html#__import__

    __import__('functools').reduce

The article goes on to use `__import__()` to one-line imports.