Python wrapper classes []

A Class package

# Encapsulation class
 class Card ( Object ):
    

    def __init__(self,num,pwd,ban):

        self.num = whether

        self.pwd = pwd

        Ban .__ Self = Ban # package (Private Variable)

    def __cun (self): # private methods

        print("寸框")

    def getBan (self, numm, pwdd): # get private variables

        if name == == self.num and pwdd self.pwd:
            
                    return self.__ban
        else:

            return  " input error! "

card = Card("1001","123456",1000)

print (card.getBan (card.num, card.pwd)) # Enter the password to get the value

print (card._Card__ban) # private method to get

1. private variables (package)

self .__ ban = ban # package (Private Variable)

Add the front of the variable "__" into a private variable

Use internal call private variables

return self.__ban

 

2. obtain private variables

card._Card__ban # Object .__ class __ variables