ImportError: Cannot import name X

Question

I have four different files named: main, vector, entity and physics. I will not post all the code, just the imports, because I think that\'s where the error is. (If you want

Answer 1

In my case, simply missed filename:

from A.B.C import func_a (x)

from A.B.C.D import func_a (O)

where D is file.