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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組み込みデータ構造を組み合わせる
これまでのデータ構造を、もっと
複雑にすることもできるのか
知りたいな。具体的には、辞書に
辞書を格納できるのかな？
この質問はよく聞かれます。
プログラマは、数値、文字列、ブール値をリストや辞書に格
納するのに慣れてくると、組み込みデータ構造にもっと複雑
なデータを格納できるのか疑問に思うようになります。つま
り、組み込みデータ構造自体が組み込みデータ構造を格納で
きるのでしょうか？
答えは「できます」。その理由は「Python ではすべてがオブ
ジェクト」だからです。
これまで組み込みデータ構造に格納してきたものはすべて
オブジェクトです。「単純なオブジェクト」（数値や文字列な
ど）であったことは重要ではありません。組み込みデータ構造
はあらゆるオブジェクトを格納できます。組み込みデータ構
造も（複雑であっても）すべてオブジェクトなので、好きなよ
うに組み合わせることができます。単純なオブジェクトのよ
うに組み込みデータ構造を代
入するだけでいいのです。
辞書の辞書を使う例を調べてみましょう。
Q
：これから行うことは辞書だけを扱うのですか？
リストのリスト、リストの集合、辞書のタプルなどもできるの
ですか？
A
：できます。ここでは辞書の辞書がどのように動作するのかを説明しますが、好きなように組み込みデータ構造を組
み合わせることができます。
3
章 構造化データ
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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.