Python - Module Not Found Error

Question

I have this structure:

F
 f1
 __init__.py
 f.py
 g.py
 f2
 __init__.py
 h.py

f2.__init__.py:

from f1 import f, g

f2.h.py:

from f2 import f, g

f2.py is a __main__ file. When i run f2, I get the error

ModuleNotFoundError: No module named 'f2'

How can I fix that?

• Milo Lu: python version?
• LChampo: @MiloLu 3.7.0 is the version
• Nouman: Why import g from f2 when it don't contains g?

Answer 1

if you are running main in the f2.h.py directly the interpreter does not seem the parent path to F.

An option is to use relative imports which are different for Python 2/3. For example, add F.__init__.py file, then chnage F.f2.__init__.py to from ..f1 import f, g and finaly in F.f2.h.py import as from F.f2 import f, g.

Another option is adding the path to the parent destination:

import os, sys
sys.path += [os.path.abspath('..')]
from f2 import f, g
if __name__ == '__main__':
 print('hello')

• LChampo: i used relative imports and this is what i always get an error. when i do from . import f, g, i get an ImportError which says cannot import f from __main__ and when i do from .. import f, g i get an ValueError which says attempted relative import beyond top-level package
• Jirka: please specify what Python you are using
• LChampo: I use python 3.7.0

Answer 2

I fix it. As Jirka B. said, the problem was i run the code directley from the interpreter. After doing what should be done, everything works as i like. Thx guys.