October 2017
Intermediate to advanced
832 pages
13h 34m
Japanese
Content preview from Fluent Python ―Pythonicな思考とコーディング手法
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付録Aスクリプト
本付録には、本文に収めるには長すぎたスクリプトのコードを完動版で示します。さらに、本書に掲載した表やテストデータを生成する際に利用したスクリプトも収録しています。
これらのスクリプトおよびコードの断片は、本書の例題コードを収録したGitHubリポジトリからも入手できます。
A.1 in演算子のパフォーマンス評価実験（3.9.1節）
例A-1に、timeitモジュールを使用して表3-6の実行時間を生成したときのコードを示します。このスクリプトがやっているのは、主としてhaystackおよびneedlesのサンプルの準備と出力フォーマットの設定です。
例A-1のスクリプトを書いているとき、私はdictの性能を正しい視点から見直すことができました。スクリプトを「詳細モード」（verbose）で実行しているとき（コマンドラインオプションの-V）、得られた実行時間は表3-5の2倍近くにもなりました。しかし「詳細モード」といっても、試験用データの準備段階で4回、そして各試験が終了した時点で見つけたneedlesの数を表示するときに1回、それぞれprintを呼び出しているだけです。haystackからneedlesを実際にサーチするループの中では、出力はまったくありません。なのに、これら5回のprintには、1,000個のneedleをサーチするのと同じくらいの時間がかかっているのです。
例A-1 container_perftest.py——測定したいコレクションの組み込み型名をコマンドライン引数に指定して実行する（たとえば「container_perftest.py dict」）†1
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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.