def changnum(num):#函数参数,副本机制,新建一个变量
print("changnum", id(num))
num = 100
print("changnum", id(num))
num = 10
print("main", id(num))
changnum(num)
print(num)
print("main", id(num))
Function parameters mechanism
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Origin blog.csdn.net/qq_44045101/article/details/103315208
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