Python Object-oriented---private properties and private methods

01, application scenario and definition mode application scenario

• In real-world development, some properties or methods of an object may only want to be used inside an object and not be externally accessible to
• A private property is a property that an object does not want to expose
• Private Methods are methods that objects do not want to expose

How to define

• when defining a property or method , add an underscore before the property name or method name , defined as a private property or method

    class Women:        def __init__(self, name):            self.name = name            self.__age = 18            # def __secret(self):        def secret(self):            # 在对象的方法内部，是可以访问对象的私有属性的            print("%s 的年龄是 %d" % (self.name, self.__age))            namei = Women("娜美")    # 私有属性和私有方法，在外界不能直接别访问    # namei.__age()    # namei.__secret()    namei.secret()        #  结果呈现    娜美 的年龄是 18

02, pseudo-private properties and private methods

tip : In daily development, do not use this method to access the object's private properties or private methods

pythonIn, and there is no real sense of private

• In the name of the property, the method is actually a number of special processing, so that the outside world can not access the
• How to handle : Add the name in front of __类名__类名__名称

    class Women():        def __init__(self, name):            self.name = name            self.__age = 18            def __secret(self):        # def secret(self):            # 在对象的方法内部，是可以访问对象的私有属性的            print("%s 的年龄是 %d" % (self.name, self.__age))            namei = Women("娜美")    # 私有属性和私有方法，在外界不能直接别访问    # namei.__age()    namei._Women__secret()    # namei.secret()        # 结果呈现    娜美 的年龄是 18

Python Object-oriented---private properties and private methods