如何使用urllib从网络下载图像
我正在尝试使用此代码下载图像：
from urllib import urlretrieve
urlretrieve('http://gdimitriou.eu/wp-content/uploads/2008/04/google-image-search.jpg',
'google-image-search.jpg')
它有效。图像已下载并可以通过任何图像查看器软件打开。
但是，下面的代码不起作用。下载的图像只有 2KB，任何图像查看器都无法打开。
from urllib import urlretrieve
urlretrieve('http://upload.wikimedia.org/wikipedia/en/4/44/Zindagi1976.jpg',
'Zindagi1976.jpg')
这是 HTML 格式的结果。
ERROR
The requested URL could not be retrieved
While trying to retrieve the URL: http://upload.wikimedia.org/wikipedia/en/4/44/Zindagi1976.jpg
The following error was encountered:
Access Denied.
Access control configuration prevents your request from being allowed at this time. Please contact your service provider if you feel this is incorrect.
Your cache administrator is nobody.
Generated Mon, 05 Dec 2011 17:19:53 GMT by sq56.wikimedia.org (squid/2.7.STABLE9)
I'm trying to download an image using this code:
from urllib import urlretrieve
urlretrieve('http://gdimitriou.eu/wp-content/uploads/2008/04/google-image-search.jpg',
'google-image-search.jpg')
It worked. The image was downloaded and can be open by any image viewer software.
However, the code below is not working. Downloaded image is only 2KB and can't be opened by any image viewer.
from urllib import urlretrieve
urlretrieve('http://upload.wikimedia.org/wikipedia/en/4/44/Zindagi1976.jpg',
'Zindagi1976.jpg')
Here is the result in HTML format.
ERROR
The requested URL could not be retrieved
While trying to retrieve the URL: http://upload.wikimedia.org/wikipedia/en/4/44/Zindagi1976.jpg
The following error was encountered:
Access Denied.
Access control configuration prevents your request from being allowed at this time. Please contact your service provider if you feel this is incorrect.
Your cache administrator is nobody.
Generated Mon, 05 Dec 2011 17:19:53 GMT by sq56.wikimedia.org (squid/2.7.STABLE9)
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如果您使用以下操作，则可以下载图像：
但如果您执行以下操作：
您可能无法下载图像。情况可能如此，因为维基百科可能有拒绝机器人或机器人（未知客户端）的规则（robot.txt）。 尝试模拟浏览器。
为此，您必须添加以下内容作为标头的一部分：
您可以执行以下操作：
这将检索文件
If you used the following, you can download the image:
But if you did the following:
You may not be able to download image. This may be the case because wikipedia may have rules (robot.txt) to deny robots or bots (unknown clients). Try emulating a browser.
To do that you have to add the following as a part of header:
You can do something like this:
This retrieves the file