Import and Pass By Reference

[jmnorse]

Hi,
I'm trying to organize my micropython code. My first thought was to extract chunks of code into functions and put them in other files. I planned to use import to bring in the function and then run the function. I also planned to use pass by reference so that those functions in other modules could alter things in my main script. However, it doesn't appear to be working. What am I doing wrong?

ref_test_mod.py

def ref_test(input_text):
    print(input_text)
    input_text = "Override"
    print(input_text)

main.py

import ref_test_mod
text = "This line is for test"
print(text)
ref_test_mod.ref_test(text)
print(text)

I expected to get the following printouts:
This line is for test <- From main.py
This line is for test <- From ref_test function printing the input string
Override <- From ref_test function now that it's overridden the input string
Override <- From main.py now that ref_test has overridden the original string that was passed by reference

Instead I get this:
This line is for test
This line is for test
Override
This line is for test

Thanks,
Justin

[stinos]

There's no thing as 'pass by reference' (nor 'pass by value' for that matter) in Python, those are concepts from other languages. Lots of good explanations here: https://stackoverflow.com/questions/986006/how-do-i-pass-a-variable-by-reference