August 2017
Intermediate to advanced
500 pages
12h 3m
Japanese
Content preview from PythonとJavaScriptではじめるデータビジュアライゼーション
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280
12 章 データの配信
経験則として、できるだけ Python でデータ操作を行うとよいでしょう。JavaScript で同等な操作
を行うよりはるかに負担が少ないからです。この経験則に従うと、配信するデータは消費する形式に
できるだけ近づけるようにします（つまり、D3 では通常は 9 章で作成したようなオブジェクトの
JSON 配列になります）。
12.1
データの配信
Web
ページの構築に使う最初の静的
HTML
や
CSS
ファイルを要求するブラウザからの
HTTP
リクエストと、それに続くデータを要求する
AJAX
リクエストを処理する
Web
サーバが必要にな
ります。開発中は、一般的にこのサーバはローカルホストのポート上で動作します（ほとんどのシ
ステムではローカルホストの
IP
アドレスは
127.0.0.1
）。通常は
HTML
ファイル
index.html
を使っ
て
Web
サイトを初期化するか、本書の場合のように
Web
可視化を構成するシングルページアプ
リケーション（
SAP
：
Single-Page Application
、
http://bit.ly/1Yyc364
）を使います。■
†
単一行サーバで
SPA
を提供するのは可視化のプロトタイピングや構想の概略を示すには問題あ
りませんが、
URL
ルーティングや動的テンプレートの利用などの基本的なサーバ機能さえも制御
† 訳注：
Python3
系の場合は
SimpleHTTPServer
の代わりに
http.server
を使います。
1
行サーバ
静的コンテンツ中心のデモの開発中や実行中には、 ...
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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.