December 2017
Beginner
624 pages
15h 38m
Korean
Content preview from Head First Python, 개정판 : 스스로 질문하며 답을 찾는 파이썬 학습서(Python 3)
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지금 여기예요
4
365
클래스 맛보기
던더 ‘init’으로 속성값 초기화하기
객체를 만들 때 초기화를 수행할 수 있도록
CountFromBy
클래스에
__
init
__
을
추가합시다.
우선은 아무 코드도 없이
pass
만 수행하는 빈
__
init
__
메서드를 추가합니다(동작은
나중에 추가할 거예요).
class CountFromBy:
def __init__(self) -> None:
pass
def increase(self) -> None:
self.val += self.incr
현재는 던더
‘
init
’
이 아무것도
수행하지 않아요. 여기서 첫 번째
인자가
‘
self
’
라는 사실은 던더
‘
init
’
이
메서드라는 결정적 힌트를 제공합니다.
increase
메서드에서는
self
를 붙여서 클래스의 속성에 접근할 수 있다는 사실을 이미
배웠습니다. 따라서
__
init
__
에서도
self
.
val
,
self
.
incr
로 속성에 접근해야
합니다. 이제
__
init
__
메서드로 클래스 속성(
val
과
incr
)을 초기화해야 합니다.
여기서
‘
초깃값은 어디에서 받죠? 그리고 어떻게 초깃값을
__
init
__
에서 사용할 수
있나요?
’
라는 질문이 생깁니다.
던더 ‘init’에 임의 개수로 구성된 인자 데이터 전달하기
1
__
init
__
은 메서드며 메서드는 결국 함수이므로 ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.