I want to do this:

int= 0

def change_int():
    	int += 1

change_int()

but of course it doesn't work, Python thinks it is a local 
variable and refuses to reference the global one. So what would 
be a good way of doing this. Note that creating a new global 
variable from within the function isn't convenient because the 
function is intended to be used in loops.
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