set_code 메서드
비어있는 객체에 새로운 값 입력하기
class Stock: def __init__(self, name, code): self.name = name self.code = code def set_name(self, name): self.name = name a. Stock(None, None) a.set_name("kakao") #Stock.set_name(a, "kakao") print(a.name)