Are there member variables in python?

There are two main types of variables used in python classes: class variables and member variables. Class variables are common to all instantiated objects of the class, while member variables are unique to each instantiated object.

#The following is explained through two small programs. (Recommended learning: Python video tutorial)

class A(object):
    def __init__(self):
        #aa为成员变量
        self.aa = 10

    @staticmethod
    def test(self):
        self.aa += -1
if __name__ == '__main__':
    x = A()
    y = A()
    #调用x
    x.test(x)
    print x.aa #输出9
    y.test(y)
    print x.aa #输出9
    print y.aa #输出9

We can obtain it in the destructor as self.aa, but obviously, aa at this time is in the form of a member variable appears, the modifications made to it at this time can only be directed to its object itself and will not affect other class objects. I think this design should be more consistent with the definition of a destructor, otherwise when an object exits the scope, it will be a particularly dangerous thing for other objects.

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