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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Web
に機能を公開する
たった
6
行で動作する
Web
アプリケーションを作成したことはいったん脇に置いて、
Flask
が
行ったことをここで考えてみましょう。
Flask
は、既存の
Python
関数を使ってブラウザ内で表示
するメカニズムを用意しています。
Web
アプリケーションにさらに機能を追加するには、機能にマッピングしたい
URL
を決め、
実際の処理を行う関数の上に
@app.route
デコレータ行を記述するだけです。そこで、
4
章の
search4letters
をデコレータにしてみましょう。
hello_flask.py
に
2
つ目の
URL
の
/search4
が入るように修正しましょう。
この
URL
を関数
do_search
にマッピングするコードを書きます。
do_search
は、（
vsearch
モジュールの）
search4letters
関数を呼び出します。そして、
do_search
関数が「
life, the universe, and everything!
」というフレーズか
ら「
eiru,!
」という文字を返すようにします。
下に既存のコードを示しています。新しいコードが必要なところはブランクにして
あるので、足りないコードを書いてください。
ヒント：
search4letters
が返す結果は
Python
の集合です。レスポンスを待っ
ているブラウザに何かを返す前に必ず組み込み関数
str
を呼び出して結果を文字列
にキャスト（型変換）してください。ブラウザは、
Python
の集合ではなくテキスト
データを期待しているからです。 ...
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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.