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
147
구조화된 데이터
객체
객체
객체
객체
키#1
키#2
키#3
키#4
딕셔너리
딕셔너리 반복하기
딕셔너리를
0
으로 초기화하고 키와 관련된 값을 증가시키는 방법도 살펴봤습니다.
이제 단어에서 발견한 모음의 빈도수를 계산하도록
vowels3
.
py
프로그램을
바꿀 수 있을 것 같습니다. 하지만 딕셔너리를 완성했다 하더라도 화면에
빈도수를 출력하려면 딕셔너리를 반복하면서 데이터를 접근하는 방법이
필요합니다.
아마 여러분 머릿속에
for
루프로 해결할 수 있겠다는 생각이 떠올랐을 거예요.
하지만
for
루프를 사용하면 예상치 못한 결과가 발생합니다.
>>> for kv in found:
print(kv)
o
i
a
u
e
늘 하던 방식으로
‘
for
’
루프를
이용해 딕셔너리를 반복합니다.
‘
kv
’
는
‘
키(key)/값(value) 쌍
’
의
줄임말입니다. 물론 변수명은
아무렇게나 결정해도 됩니다.
반복은 된 것 같은데 결과가
조금 이상합니다. 빈도수는
어디로 간 거죠? 지금 키 값만
출력되었어요...
궁금하면 다음 페이지를 확인하세요.
뭔가 잘못 출력되었어요.
관련 값이 아니라 키 값만
출력되었어요.
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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.