python global usage

The global usage of python is: If you need to change the variables outside the function inside the function, you can declare the variable as a global variable inside the function, so that when the program runs to the global variable, it will replace the external variable with the same name.

#If you need to change the variables outside the function inside the function, you can declare the variable as a global variable inside the function. In this way, when the program runs to the global variable, it will replace the external variable with the same name.

Example 1:

# -*- coding:utf-8 -*-
 
name = "小明"
 
def test():
    global name
    name = "xiaoming"
    return name
 
if __name__ == "__main__":
    print name
    print test()
    print name

Run result:

小明

xiaoming

xiaoming

Recommended tutorial: "Python Tutorial"

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