파이썬 객체지향(private), 상속

self는 자바에서 this와 비슷한 쓰임

필드변수에 __(언더바2개)를 주면 private 됨

class선언,초기화, private

 

---

상속 예시

class Person(object):
    def __init__(self, name, age, gender):
        self.__name=name
        self.__age=age
        self.__gender=gender
    
    def about_me(self):
        print("이름",self.__name,"나이는",self.__age, "성별은",self.__gender,end=" ")

p1=Person('홍길동',20,'남자')
p1.about_me()

class Employee(Person):
    def __init__(self, name, age, gender, salary, hire_date):
        super().__init__(name,age,gender)
        self.__salary=salary
        self.__hire_date=hire_date
    
    def do_work(self):
        print("열심히 일한다.")
        
    def about_me(self):
        super().about_me()
        print("급여:", self.__salary, "입시일:",self.__hire_date)

e1=Employee('홍길수', 30, '남자', 500, '2019-01-03')
e1.about_me()

class Student(Person):
    def __init__(self, sno, name, age, gender, major):
        super().__init__(name, age, gender)
        self.__sno=sno
        self.__major=major
    
    def change_major(self, new_major):
        print("학생의 전공을 변경합니다:From %s to %s"%(self.__major, new_major))
        self.__major=new_major
        
    def about_me(self):
        print('학번:', self.__sno, end=" ")
        super().about_me()
        print('전공:', self.__major)

s1=Student(112233,'홍길수', 20, '여자', '정보통신')
s1.about_me()