Global Variables. Migrate code from MatLab

[snippsat]

#!/usr/bin/env python3
import numpy as np
from function import fwd

global I # Make no sense since I is in global namespace

I = 90 # Is global

result = fwd()
print(result)

Here how you do it.

#bar.py
import numpy as np
from foo import fwd

I = 90
result = fwd(I)
print(result)

#foo.py
def fwd(I):
    J = 10
    K = I + J
    return [K]

if __name__ == '__main__':
    # Test this will not run on import
    I = 90
    print(fwd(I))

Running bar.py:

λ python bar.py
[100]

Using global I can simplify my code and avoid atributions errors.

No,that not an excuse at all for using stupid global.
global destroy the whole point of functions,
which is keeping code local to function and not mix in with stuff in global namespace.
If it to difficult with function,using class is the next step.