How to import submodules from relative path?

Question

I have multiple modules in my project and specify some execution point. But when I try to import files from submodules, it doesn't work.

So, how to specify submodules to execute from selected execution file?

project
--bin
---- executeFile
--modules
---- __init__.py
----fileA.py

in executeFile , I try:

from ..modules.fileA import * 

but get the error:

Traceback (most recent call last):
File "./bin/muexecute", line 10, in <module>
  from ..modules.os import *
SystemError: Parent module '' not loaded, cannot perform relative import

Answer 1

I found solution. The problem was in my opinion about using init .py. I placed in executable scripts path to including and it works fine

PACKAGE_PARENT = '..'
SCRIPT_DIR = os.path.dirname(os.path.realpath(os.path.join(os.getcwd(), os.path.expanduser(__file__))))
sys.path.append(os.path.normpath(os.path.join(SCRIPT_DIR, PACKAGE_PARENT)))

Answer 2

All modules you want to import should in in your PYTHONPATH. Therefore there is no hierarchy. In your case It seems to me that an __init__.py is missing from your project's main folder (with all the models included), so executefile doesn't know about your modules.

Answer 3

So you are having trouble defining your relative path, correct? Try the following:

from sys import path
path.append('C:\\realative_path')
from function_file import required_function

Hope that helps.