[Tutor] Help with Package Importing

[Colin Daly]

Hello,

I have a question about how to properly import packages. I had created a
basic nested program in order to clearly show my error, but it doesn't look
like I can upload files for sharing. Please excuse me as this is my first
time posting here.

I have the following folder and file structure:

/MainDirectory
MainFile.py
| -- / Sub 1
| -- | -- SubProgram1_1.py
| -- | -- SubProgram1.py
| -- / Sub 2
| -- | -- ReadFile.py

I'm working out of MainDirectory. In MainFile.py I have:

MainFile.py
********************************************************
import Sub1.SubProgram1_1 as s1_1

def DoSomething():
       z = s1_1.SubFunc1_2()
       print(z)

DoSomething()

********************************************************

And inside ./Sub1/SubProgram1_1 I have

SubProgram1_1.py
********************************************************
import Sub1.SubProgram1 as s1

def SubFunc1_2():

     xx = s1.SubFunc1()
    yy = xx + 22
    return yy

def main():
    n = SubFunc1_2()

    print(f"you are in subprogram1_1. value from SubFunc1_2 is {n}")

if __name__ == "__main__":
    main()

********************************************************

MainFile.py runs fine like this, but SubProgram1_1.py does not run like
this. I need to change
import Sub1.SubProgram1 as s1
to
import SubProgram1 as s1

How should I have things such that I can run MainFile.py and
SubProgram1_1.py without messing with the import statements. Best I can
tell is to add the following to SubProgram1_1.py:

import os, sys
sys.path.insert(0, os.path.join(os.path.split(__file__)[0], ".."))

but that seems not very clean. Why should SubProgram1_1 need to import
Sub1.SubProgram1_1 when it's in the same folder?

Thank you!