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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474 Chapter 11
소란 피우지 마세요
예외를 조용히 처리하세요
진심이에요? ‘log_request’에서 일으킨 예외를
조용히 처리하라고요? 모든 게 잘되길 빌면서 예외를
무시하는 것과 뭐가 다르죠?
아니요. 여기서
‘
조용히
’
는
‘
무시
’
하라는 의미가 아니에요.
조용히 예외를 처리한다는 것은 웹앱 사용자가 알지
못하게 처리하라는 의미예요. 현재는 예외가 발생하면
웹앱이 크래시되면서 혼란스럽고 무시무시해 보이는
페이지를 사용자에게 보여주고 있으니까요.
log
_
request
호출이 실패한 것은 우리가 신경 써야
할 문제일 뿐 사용자는 아무 관련이 없어요. 따라서
log
_
request
에서 발생한 에러를 사용자는 모르게
하고 우리는 알아차릴 수 있도록 처리해야 합니다.
try/except를 사용하면 코드가 더 읽기 어려워지고 이해하기도 힘들어지지 않나요?
사실입니다. 예제에서도 볼 수 있었듯이 처음에는 세 행으로 이루어진 코드가 try/except 때문에 일곱 행이 되었는데 실제 프로그램
동작은 바뀐 게 없으니까요. 하지만 잠재적으로 발생할 수 있는 예외로부터 코드를 보호하는 것은 중요한 일입니다. try/except 만큼 잠재적
에러로부터 코드를 잘 보호하는 기술은 없습니다. 시간이 좀 지나면 우리 두뇌는 try 스위트에 있는 실제 동작을 하는
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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.