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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12
章 高度なイテレーション
猛烈にループする
this is a new chapter
477
ループはとにかく時間がかかります。
ほとんどのループは何かを何回も実行するためのものなので、当然のこととも言えます。
ループを最適化するには、
2
つの方法があります。
1.
構文の改善（ループの指定を容易に
する）と
2.
実行方法の改善（ループを高速にする）です。はるか昔、
Python 2
の初期に、言
語設計者はこの両方を実現するような言語機能、内包表記を追加しました。この奇妙な名
前を聞いただけでうんざりしたかもしれませんが、この章を読み終わる頃までには、今ま
でずっと内包表記なしで済ませてきたことに驚くほど、内包表記の素晴らしさがわかるで
しょう。
最高に素晴らしい
アイデアを思い付いたわ。
ループをもっと速くできたら
どうなるかしら？
フライトデータ
バハマ・ブザーには目的地がある
ループ内包表記の威力を知るために、「実際」のデータを調べましょう。
西インド諸島バハマ諸島のニュープロビデンス島にあるバハマの首都ナッソーを拠点と
する航空会社バハマ・ブザー社は、島巡りフライトのサービスを行っています。あなたは
Python
の知識を買われてこの会社から、プログラミングを手伝ってくれるように頼まれて
いるとします。この会社 ...
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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.