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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69
画像を一括ダウンロードしよう
LESSON
07
実行すると、「sample1.png」という画像ファイルが書き出されます。
ダウンロード用のフォルダを作って保存する
次は、複数の画像ファイルを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。
ダウンロード用のフォルダを作り、そこにまとめて書き出します。
パソコン上にフォルダを作ったり、そのフォルダにいろいろアクセスしたりするには
「
Path」を使います。Pathは、標準ライブラリでpathlibというパッケージに入っているの
で「
from pathlib import Path」と指定するだけでimportできます。
フォルダ名を指定して
Pathを作ったら、「.mkdir( exist_ok=True )」と命令すると、フォル
ダが作られます。また、そのフォルダ内のファイルにアクセスするときは「フォルダ
.
joinpath( "
ファイル名" )」と、フォルダとファイル名をつなぐだけで、アクセスできるパ
スを作れます。このパスに画像データを書き出せば、フォルダ内に画像ファイルが作られ
ます。
フォルダ = Path("フォルダ名")
フォルダ.mkdir(exist_ok=True)
フォルダ.joinpath("ファイル名")
出力結果
オバケが出た〜〜〜〜！
書式：フォルダを作る
書式：フォルダ内のファイルにアクセスするパスを作る
Chapter
2
70
「download」というフォルダを作って、そこにサンプルの画像ファイルをダウンロード
してみましょう。
import ...
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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.