Python函数定义global

原文:http://www.kuqin.com/abyteofpython_cn/ch07s03.html

#!/usr/bin/python
# Filename: func_global.py

def func():
    global x

    print 'x is', x
    x = 2
    print 'Changed local x to', x

x = 50
func()
print 'Value of x is', x

输出

$ python func_global.py
x is 50
Changed global x to 2
Value of x is 2