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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LESSON
03
35
requests
でアクセスしてみよう
openでファイルを開くとき、書き込みモード以外にもいろいろなモードを指定できます。
open
のいろいろなモード
"r" 読み込み用（デフォルト）
"w" 書き込み用
"a" 追加書き込み用
"t" テキストモード（デフォルト）
"b" バイナリーモード
テキストファイルに書き込む：
with
文
「ファイルを開いたら、閉じる」というのは必ずセットで行うことなので、省略して書
く方法があります。それが「
with文」です。
with open(ファイル名, mode="w") as f:
･･･ファイルを書き込みモードで開く
f.write(書き込む値)
･････････････････････････データを書き込む
「with as」でファイルを開いて、「開いたときにすること」をインデントして書くだけで
す。「
close()」を書かなくていいので、閉じわすれのエラーがなくなります。また、インデ
ント部分だけを見ればどんな処理をしているのかがわかるので、見やすくなります。
with文を使って、インターネット上から読み込んだデータを、ファイルに書き出してみ
ましょう。
import requests
url = "https://www.ymori.com/books/python2nen/test1.html"
response = requests.get(url)
･･････････････Webページを取得する
response.encoding = response.apparent_encoding ...
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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.