Python的全局变量 [英] Pythons global variable

问题描述

如何定义全局变量.

例如，我有Foo1类和Foo2类，并且我想在此类中使用FooVariable作为全局变量.

For example I have Foo1 class and Foo2 class and I want to use FooVariable in this classes as a global variable.

推荐答案

如果您想要一个名为 foo 的全局变量，则只需将 global foo 放在使用它的任何功能的顶部.例如，

If you wanted a global variable named foo, you would just have to put global foo at the top of any function in which it is used. For example,

def do_something():
    global foo
    foo = foo + 1
    print foo

请注意，Python全局"变量仅对它们所出现的模块是全局的，而不是整个程序的全局(如某些语言).

Note that Python "global" variables are only global to the module they appear in, not global to the entire program (as in some languages).

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