[Python] Global Variables between different modules

main.py:

from module import *
var=10

def func2():
print "func2:" ,var

def main():
global var
var=20
print "main - before", var
func2()
func1()
print "main - after", var

if __name__=='__main__':
main()


module.py

from main import *

def func1():
global var
print "func1:", var


The program prints:

main - before: 20

func2: 20

func1: 10

main - after 20
​

'var' is a global variable. I would expect that the moment I change var's value, it will be changed wherever the variable 'var' appears. The only difference between func1 and func2 is that func1 is in another module. Still, I don't understand why the value of 'var' is different between func1 and func2.

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