无法从其他文件夹导入模块-python

Question

This is the structure of my code:

---root-dir/
        ----app/
            -----config/
                    ------ __init__.py
                    ------   config.py
            -----constants/
                    ------ __init__.py
                    ------ ****.py
                    ------ ****.py
            -----exception/
                    ------ __init__.py
            -----main/
                    ------ __init__.py
                    ------ controller.py
            -----util/
                    ------ __init__.py
                    ------ picklehelp.py

Now when I do the below import in /main/controller.py and run, it does not work.

from app.util.picklehelp import func

How can I import the modules, without doing maximum changes in code so that it can work in any machine irrespective of the path location and OS

Answer 1

The answer would be adding to the sys.path the path to your app (without the filename):

import sys
sys.path.append(r"root-dir\app\util")

from picklehelp import func

How can I import the modules, without doing maximum changes in code so that it can work in any machine* irrespective of the path location and OS

The sys module works at any operating system that Python supports. Then, there can be other modules indepent to an OS, like winsound , winreg or windows in the Windows operating system.

_{* Not any machine can run Python}

Answer 2

Change your directory to root-dir. Run python -m app.main.controller

This will run your app as a module.