May 2024
Intermediate to advanced
200 pages
4h 57m
Japanese
Content preview from Python2年生 スクレイピングのしくみ 第2版 体験してわかる！会話でまなべる！
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67
画像ファイルを読み込んで保存する
まずは、画像ファイルを1枚だけダウンロードするテストプログラムを作ってみましょ
う。本書のテストページから以下の
URLのサンプル画像をダウンロードします。
テストページのサンプル画像
https://www.ymori.com/books/python2nen/sample1.png
ダウンロードの方法は、
requestsでインターネットからデータを取得して、ファイルに
書き込むだけです。ただし、画像ファイルはバイナリーファイルなので、ファイルを開く
ときに「
mode="wb"」と指定します。
07
LESSON
ページに使われている画像ファイルを調べて、自動的にすべてダウンロー
ドしてみましょう。
画像を一括
ダウンロードしよう
これも欲しいな。「すべての画像を探す」んだから同じ感じでできそう
だね。
次は、「ページ内の画像を一括ダウンロードするプログラム」を作って
みよう。
画像の
URL
を検索するところは同じ感じでできるね。でも、その
URL
を使って複数の画像ファイルをダウンロードするので少し違うよ。
Chapter
2
68
imgdata = requests.get(画像URL)
with open(
ファイル名, mode="wb") as f:
f.write(imgdata.content) ...
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