June 2026
Intermediate
804 pages
8h 21m
Japanese
Content preview from 入門 Python 3 第3版
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1章入門
汚い言語だけが人気を集める。例外はPythonだけだ。
—— ドナルド・クヌース
あなたはPythonを学ぼうとしている。素晴らしいことだ。
コンピュータやPythonについて、多少知っている人もいれば、まったく知らない人もいる。説明が冗長だと感じたら、先へ進んでも構わない。筆者は気にしない。では、始める。
1.1 なぞなぞ
最初は簡単ななぞなぞだ。次の2行はどういう意味か。
(Row 1): (RS) K18,ssk,k1,turn work. (Row 2): (WS) Sl 1 pwise,p5,p2tog,p1,turn.
技術的なもの、コンピュータプログラムの一種のように見える。実際には、これはニットパターンだ。具体的には、靴下のかかとの部分の曲げ方を説明しているニットパターンの断片である。
図1-1 ニットの靴下
筆者からすると、うちの猫が数独を見てちんぷんかんぷんなのと同じぐらいわけがわからない。しかし、私の妻なら完璧に理解できるし、編み物をする人ならわかるだろう†1。
[†1] 監訳注：国によって編み方や記号が異なる。日本ではJIS L0201「編目記号」によって定義されているほか、文章ではなく編図で説明する場合が多い。
次の問題は以下のようなテキストだ。最終的に何ができあがるのかはわからなくても、何のためのものかは直ちにわかるはずだ。
1/2 c. バターまたはマーガリン 1/2 c. クリーム 2 1/2 c. 小麦粉 1 t. 塩 ...
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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.