Class III Method

# Class can be defined in three ways 
# 1, examples of method of 
the first method is a parameter # Self 
# 2, class method 
first method is a parameter # CLS (showing the current class), it is necessary hat @classmethod 
#. 3, static method 
# method has no parameters, with the hat @staticmethod 


class the person (Object): 
    Country = 'China' 
    __skin_color = 'yellow' 

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

    # definition of instance method, may be modified and acquiring data private instance attributes 

    def set_age (self, new_age): # examples may replace the class methods, using Self .__ class__ is 
        IF 0 <Age <150: 
            Self .__ Age = new_age 
        the else: 
            Print ( 'Please enter the legal age!') 

    DEF get_age (Self): 
        return Self .__ Age 


    # define class methods can be modified and access to private class attributes, general and related operations use the current class
    @classmethod 
    DEF set__skin_color (CLS, new_color is): 
        Print (CLS) 
        CLS .__ skin_color = new_color is 

    @classmethod 
    DEF get_skin_color (CLS): 
        return CLS skin_color .__ 

    # define a static method, when the method does not require the current class (CLS) and the current object (Self) 
    @staticmethod 
    DEF SUM (num1, num2): 
        return num1 num2 + 

    # class methods may be rewritten as an example of such a method, the above method is modified to such class 
    DEF set__skin_color (Self, new_color is): 
        Self .__ class = __.__ skin_color new_color 

    DEF get_skin_color (Self): 
        return Self .__ class __.__ skin_color