Super simple import doesn't work. Please help!

[nilamo]

I'm on the same version, also on Windows. Here's basically what it looks like you're doing:

E:\Projects\etc>python -V
Python 3.6.5

E:\Projects\etc>echo import other > spam.py

E:\Projects\etc>echo def something(): print("hi") > other.py

E:\Projects\etc>python spam.py

E:\Projects\etc>echo import other; other.something() > spam.py

E:\Projects\etc>python spam.py
hi

So what you're doing clearly works. Try renaming the folder/file. I don't know enough about the module system to be sure, but the file having the same name as the folder could possibly be confusing the importer? From what I know, the folder is only considered a module if it contains a file named __init__.py, but like I said, I don't know that for sure.