Global variables between modules [duplicate]

Question

I have not been able to find a reason why the matter does not work for me, so I would like to ask a question here.

I have 2 files:

file2.py:

def test():
    global justTry
    justTry = "hello"

and main.py:

from file2 import *

def main():
    print(justTry)

if __name__ == '__main__':
    test()
    main()

And I am getting the error: NameError: name 'justTry' is not defined. Why can't I use the justTry variable, which I declared as a global variable in the step before the listing?

Answer 1

when "*importing" something, it executes the code, and copy's the globals in to your globals. but if globals get alterd later, it won't re-copy the globals. the solution is, to re-import the file after test is called

file2.py:

def test():
    global justTry
    justTry = "hello"

main.py:

from file2 import *

def main():
    print(justTry)

if __name__ == '__main__':
    test()
    from file2 import *
    main()