How to pass a variable to and from PCDMIS using Python?

What exactly happens when you try your script? I don't actually have PCDMIS but use a similar program...

There is also environment variables, which you could set in python and and use a VBA script to pull into PCDMIS, not sure how impractical that is though:

import os

os.environ["MYVARIABLE"] = "hello"
print(os.environ["MYVARIABLE"])

VBA to read the variable is Environ("MYVARIABLE")

What exactly happens when you try your script? I don't actually have PCDMIS but use a similar program...

There is also environment variables, which you could set in python and and use a VBA script to pull into PCDMIS, not sure how impractical that is though:

import os

os.environ["MYVARIABLE"] = "hello"
print(os.environ["MYVARIABLE"])

VBA to read the variable is Environ("MYVARIABLE")

I don't think they environment variable is saved once the python program is closed. If I were to do this I would use a workaround notepad txt file like below.  I really don't want to do this and want to find the simple solution to directly pass variables to and from pcdmis.  Not to mention I can't stand the vba syntax.

LOC1 = 0.100
LOC2 = 0.200

variables_path = r'C:\Users\user\Desktop\variables.txt'

# Write the values to a file
with open(variables_path, "w") as file:
    file.write(f"{LOC1}\n")
    file.write(f"{LOC2}\n")

# Read and print the values from the file
with open(variables_path, "r") as file:
    for line in file:
        print(line.strip())

The environment variable is not lost when the python script ends. It is part of the set of variables the windows OS uses. You just have to make sure the variable is named in a very very specific fashion. There are other ways to read them as well. Like I said I can't test it for your specific application.

I realized you are correct about that. I've found a way to do it that is to my liking at least.

My software has a built-in command: Clipboard.SetText / GetText

I'm sure you can figure out your favorite way to access the clipboard from PC-DMIS.

import subprocess

txt = subprocess.getoutput("powershell.exe -Command Get-Clipboard")
print(txt)

there are many other ways to access the clipboard in python: https://stackoverflow.com/questions/101128/how-do-i-read-text-from-the-windows-clipboard-in-python

Its not as sophisticated as I would like but saves you the trouble of having a million .txt files that your programs require