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在函数里定义了一个变量，但是后面还需要用到
直接在函数外面定义变量就行，函数里面要用就加global修饰。
a = 1 def func1(): global a a = 2 def func2(): global a a += 1 func1() func2() print(a)
最后输出 3
好的。。。。。。