python based learning (XII)

24. The class function

# Class function 
# class methods 


class Student:
     DEF  the __init__ (Self, name, Age, Sex):
         # __name__ __age __sex internal attributes This ensures that the external can not be freely modified 
        Self. __Name__ = name 
        Self. __Age = Age 
        Self. __Sex = Sex 

    DEF print_info (Self):
         Print (F ' {name} Self .__ - .__ Self Age} {-} {Sex Self .__ ' ) 


# student example S 
DEF print_info (S):
     Print (F ' {s.name} - {S } .age - s.sex {} ')


jack = Student("jack.a", 13, "男")
# print_info(jack)
print("---------------------------------------")
jack.name = "ab"
jack.print_info()

run results:

 

 Change __name

class Student:
     DEF  the __init__ (Self, name, Age, Sex):
         # __name__ __age __sex internal attributes This ensures that the external can not be freely modified 
        Self. __name__ = name 
        Self. __age = Age 
        Self. __sex = Sex 

    DEF print_info (Self):
         Print (F ' {name} Self .__ - .__ Self Age} {-} {Sex Self .__ ' ) 

    DEF get_name (Self):
         return . Self __name__ 

    DEF set_name (Self, name): 
        . Self __name__ = name


# 学生实例 s
def print_info(s):
    print(f'{s.name}-{s.age}-{s.sex}')


jack = Student("jack.a", 13, "男")
print(jack.get_name())
print("---------------------------------------")
jack.name = "ab"
jack.set_name("ba")
jack.print_info()

run results: