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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126
5 章 Python による Web からのデータの取得
lxml
のパーサに対しては、
BeautifulSoup
は上記で使った単純な文字列名、正規表現を使った検
索（
https://ja.wikipedia.org/wiki/
正規表現）、タグ名のリストの使用などタグを探すためのさま
ざまなフィルタを用意しています。詳細は
https://www.crummy.com/software/BeautifulSoup/
bs4/doc/#kinds-of-flters
を参照してください。
lxml
の
select
や
select_one
と同様に、解析したツリーを検索するのに便利な
10
個
の
BeautifulSoup
メソッドがあります。これらのメソッドは、基本的にはツリーの検索す
る部分を指定する
find
や
find_all
から派生したものです。例えば、
find_parent
と
find_
parents
はツリーの下方向に子孫を探すのではなく、検索しているタグの親タグを探します。
BeautifulSoup
の公式ドキュメント（
https://www.crummy.com/software/BeautifulSoup/bs4/
doc/#fnd-parents-and-fnd-parent
）にこの
10
個のメソッドが記載されています。
Wikipedia
テーブルの選択方法がわかったので、
lxml
選択メソッドを使って目的のデータを取
得する選択パターンを作成してみましょう。
5.7.1
選択パターンの作成
データテーブルを正しく選択したので、必要なデータをスクレイピングする選択パターンを作成 ...
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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.