Answer 1

create two files in the same directory.
in one, import the other's file name but drop the ".py"

ex1.py
ex2.py

# ex2.py's code
import ex1
#OR
from ex1 import *

# ... rest of code ...

Answer 2

Qhufu ,

make sure that both files are physically stored. if the file that will import the module is not stored, this error will come up...

Answer 3

I use pydroid and had that problem before. The fix is what Lothar said, for both files to be phisically stored (in other words, just save the files)