python Class (1)

Cat class (): 
    "" "class" "" 

    Tag = 'I was the cat' 

    DEF __init __ (Self, name, Age): 
        self.name = name 
        # private variable 
        Self .__ Age = Age 

    DEF set_age (Self, Age) : 
        Self .__ Age = Age 
        # return Self .__ Age 

    DEF show_info (Self): 
       REST = 'my name: {0}, {1} years old this year' .format (self.name, Self .__ Age) 
       Print (REST) 
       return REST 

    eAT DEF (Self): 
        "" "eat" "" 
        Print ( "cats like to eat fish") 


    DEF the catch (Self): 
        "" "and mouse" "" 
        Print ( "I can catch the mouse") 


IF __name__ == ' __main__ ':
    # Instantiated 
    cat_black = Cat ( 'black', 2) 
    cat_black.eat ()
    cat_black.show_info () 

    Print ( '--------') 
    # Print (cat_black.name) # black 
    # Print (cat_black.age) 
    # private variable can not access 
    # Print (cat_black .__ Age) 
    cat_black.name = 'white' 
    cat_black.show_info () # my name: white, 2 years old 

    Print ( '--------') 
    # set the age 
    # cat_black.set_age (7) 
    # cat_black.show_info () I call: white, 7 years old 

    Print (Cat.tag) 
    Print (cat_black.tag) 

    Print ( '--------') 
    # determine whether an instance of the class 
    print (isinstance (cat_black, Cat) ) # True