如何使用urllib下载文件?在Python 3请求吗?

So, I'm messing around with urllib.request in Python 3 and am wondering how to write the result of getting an internet file to a file on the local machine. I tried this:

我在玩小熊星座。在Python 3中请求，我想知道如何将一个internet文件的结果写入本地机器上的文件。我试着这样的:

g = urllib.request.urlopen('http://media-mcw.cursecdn.com/3/3f/Beta.png')
with open('test.png', 'b+w') as f:
    f.write(g)

But I got this error:

但我犯了一个错误:

TypeError: 'HTTPResponse' does not support the buffer interface

What am I doing wrong?

我做错了什么?

NOTE: I have seen this question, but it's related to Python 2's urllib2 which was overhauled in Python 3.

注意:我看到过这个问题，但是它与Python 2的urllib2有关，后者在Python 3中被彻底检查过。

2 个解决方案

#1

change

改变

f.write(g)

来

f.write(g.read())

#2

An easier way I think (also you can do it in two lines) is to use:

我认为一个更简单的方法(也可以用两行)是:

import urllib.request
urllib.request.urlretrieve('http://media-mcw.cursecdn.com/3/3f/Beta.png', 'test.png')

As for the method you have used. When you use g = urllib.request.urlopen('http://media-mcw.cursecdn.com/3/3f/Beta.png') you are just fetching the file. You must use g.read(), g.readlines() or g.readline() to read it it.

至于你用过的方法。当您使用g = urllib.request.urlopen('http://media-mcw.cursecdn.com/3/3f/Beta.png')时，您只是在获取文件。您必须使用g.read()、g.readlines()或g.readline()来读取它。

It's just like reading a normal file (except for the syntax) and can be treated in a very similar way.

这就像读取一个普通的文件(除了语法)，并且可以以非常相似的方式进行处理。

#1