March 2018
Beginner to intermediate
624 pages
16h 10m
Japanese
Content preview from Head First Python 第2版 ―頭とからだで覚えるPythonの基本
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同時に複数のことを行う
log_request
関数は、メインの
Web
アプリケーションとは独立して実行させます。
そのために、
log_request
のそれぞれの呼び出しが同時に動作するように
Web
アプリ
ケーションのコードを修正します。つまり、
Web
アプリケーションが別のユーザからの
別のリクエストに応える前に
log_request
が完了するのを待たなくてもよくなると
いうことです（すなわち、遅延が解消されます）。
log_request
の実行が瞬時でも、数秒、数分、さらには数時間かかっても、
Web
ア
プリケーションにもユーザにも関係なくなります。コードが最終的に実行されることが
大切なのです。
並列コード：選択肢がある
Web
アプリケーションのコードを同時に実行するには、いくつかの選択肢があります。
Python
は多くのサードパーティモジュールだけでなく、標準ライブラリも同時に実行す
るための組み込み機能を
備えています。
最もよく知られているものの
1
つが
threading
ライブラリです。
threading
ラ
イブラリを使うには、コードの冒頭で
threading
モジュールから
Thread
クラスを
import
するだけです。
from threading import Thread
vsearch4web.py
ファイルの先頭付近に上の
1
行を追加してください。
これで楽しいことが始まります。
新たなスレッドを作成するには、
Thread
オブジェクトを作成し、キーワード引数
target
にこのスレッドで実行させ ...
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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.