I'm trying to run a python program (specifically, I'm running manimgl, but I don't think that matters here) and the first line reads from manim_imports_ext import *. However, I am getting the error ModuleNotFoundError: No module named 'manim_imports_ext' even though I have verified that the file manim_imports_ext.py is in the current working directory. The program itself is in a subdirectory, but that doesn't seem relevant.
Any help would be greatly appreciated; it seems like I must be doing something dumb.