January 2018
Intermediate to advanced
856 pages
17h 17m
Chinese
Content preview from Python 技術手冊 第三版
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HTTP 與 URL 客戶端
|
627
f.info()
回傳模組
mimetools
的類別
Message
的一個實體
m
，涵蓋於後面的
「rfc822 和 mimetools 模組（v2）」 中 。
m
的標頭提供了有關
f
的詮釋資
料。舉例來說，
'Content-Type'
是
f
中資料的 MIME 類型，而
m
的方法
m.gettype()
、
m.getmaintype()
與
m.getsubtype()
提供了相同的資訊。
當
data
為
None
而
urlstring
的 scheme 為
http
，
urlopen
會送出一個
GET
請求。當
data
不是
None
，
urlstring
的 scheme 必須是為
http
，
urlopen
會送出一個
POST
請求。
data
必須是 URL 編碼的形式，而你一般會以函式
urlencode
來準備它，如上面所涵蓋的。
urlopen
可以使用不需要認證的 proxies（代理伺服器）。將環境變數
http_
proxy
、
ftp_proxy
與
gopher_proxy
設為proxies 的 URL 以運用它們。你
一般會在你系統的環境中進行這種設定，以取決於平台的方式進行，在
你啟動 Python 之前。僅限在 macOS 上，
urlopen
會透明地並隱含地從
你的 Internet 組態設定取得 proxy 的 URL。或者，你可以傳入一個映射
（mapping）作為引數
proxies
，其鍵值為 scheme 的名稱，而對應的值
是 proxy 的 URL。舉例來說：
f = urllib.urlope ...
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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.