# File: ChapterControlFunc/func2.py

a = 3 # global variable

def func1( x ):
    a = x      # a is local var
    a = a + 1
    x = x + 1
    print("func1 a=%d x=%d" % ( a, x ))

def main():
    print("main: ", a) # a=3
    func1(7)
    print("main, after func1: ", a) # a=3

main()