python中global用法实例分析

WBOY
Release: 2016-06-06 11:15:28
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本文实例讲述了python中global用法。分享给大家供大家参考。具体分析如下:

1、global---将变量定义为全局变量。可以通过定义为全局变量,实现在函数内部改变变量值。

2、一个global语句可以同时定义多个变量,如 global x, y, z

示例程序:

>>> def func():
...   global x
...   print 'x is ', x
...   x = 2
...   print 'Change local x to ', x
...
>>> x = 50
>>> func()
x is 50
Change local x to 2
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希望本文所述对大家的Python程序设计有所帮助。

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