blocks|key|1449290|text|您必须安装ProxyHandler|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1449291|urllib2.install_opener(
++++urllib2.build_opener(
++++++++urllib2.ProxyHandler({'http':+'127.0.0.1'})
++++)
)
urllib2.urlopen('http://www.google.com')|code-block|syntax|javascript|1449292|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

You have to install a ProxyHandler

<pre><code>urllib2.install_opener(
 urllib2.build_opener(
 urllib2.ProxyHandler({'http': '127.0.0.1'})
 )
)
urllib2.urlopen('http://www.google.com')
</code></pre>

blocks|key|1449329|text|proxy+=+urllib2.ProxyHandler({'http':+'127.0.0.1'})
opener+=+urllib2.build_opener(proxy)
urllib2.install_opener(opener)
urllib2.urlopen('http://www.google.com')|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1449330|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>proxy = urllib2.ProxyHandler({'http': '127.0.0.1'})
opener = urllib2.build_opener(proxy)
urllib2.install_opener(opener)
urllib2.urlopen('http://www.google.com')
</code></pre>

blocks|key|1449399|text|要使用默认系统代理(例如，从http_support环境变量)，以下命令适用于当前请求(无需将其全局安装到urllib2中)：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1449400|url+=+'http://www.example.com/'
proxy+=+urllib2.ProxyHandler()
opener+=+urllib2.build_opener(proxy)
in_+=+opener.open(url)
in_.read()|code-block|syntax|javascript|1449401|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

To use the default system proxies (e.g. from the http_support environment variable), the following works for the current request (without installing it into urllib2 globally):

<pre><code>url = 'http://www.example.com/'
proxy = urllib2.ProxyHandler()
opener = urllib2.build_opener(proxy)
in_ = opener.open(url)
in_.read()
</code></pre>

blocks|key|1234717|text|您可以使用环境变量设置代理。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1234718|import+os
os.environ['http_proxy']+=+'127.0.0.1'
os.environ['https_proxy']+=+'127.0.0.1'|code-block|syntax|javascript|1234719|urllib2将以这种方式自动添加代理处理程序。您需要为不同的协议单独设置代理，否则会失败(就不通过代理而言)，如下所示。|offset|length|style|CODE|1234720|例如：|1234721|proxy+=+urllib2.ProxyHandler({'http':+'127.0.0.1'})
opener+=+urllib2.build_opener(proxy)
urllib2.install_opener(opener)
urllib2.urlopen('http://www.google.com')
#+next+line+will+fail+(will+not+go+through+the+proxy)+(https)
urllib2.urlopen('https://www.google.com')|1234722|相反，|1234723|proxy+=+urllib2.ProxyHandler({
++++'http':+'127.0.0.1',
++++'https':+'127.0.0.1'
})
opener+=+urllib2.build_opener(proxy)
urllib2.install_opener(opener)
#+this+way+both+http+and+https+requests+go+through+the+proxy
urllib2.urlopen('http://www.google.com')
urllib2.urlopen('https://www.google.com')|1234724|entityMap^0|0|0|0|7|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Y|8|@$I|Z|J|10|K|L]]|9|@]|A|$]]|$1|M|3|N|5|6|7|11|8|@]|9|@]|A|$]]|$1|O|3|P|5|D|7|12|8|@]|9|@]|A|$E|F]]|$1|Q|3|R|5|6|7|13|8|@]|9|@]|A|$]]|$1|S|3|T|5|D|7|14|8|@]|9|@]|A|$E|F]]|$1|U|3|-4|5|6|7|15|8|@]|9|@]|A|$]]]|V|$]]

You can set proxies using environment variables.

<pre><code>import os
os.environ['http_proxy'] = '127.0.0.1'
os.environ['https_proxy'] = '127.0.0.1'
</code></pre>

<code>urllib2</code> will add proxy handlers automatically this way. You need to set proxies for different protocols separately otherwise they will fail (in terms of not going through proxy), see below.

For example:

<pre><code>proxy = urllib2.ProxyHandler({'http': '127.0.0.1'})
opener = urllib2.build_opener(proxy)
urllib2.install_opener(opener)
urllib2.urlopen('http://www.google.com')
# next line will fail (will not go through the proxy) (https)
urllib2.urlopen('https://www.google.com')
</code></pre>

Instead 

<pre><code>proxy = urllib2.ProxyHandler({
 'http': '127.0.0.1',
 'https': '127.0.0.1'
})
opener = urllib2.build_opener(proxy)
urllib2.install_opener(opener)
# this way both http and https requests go through the proxy
urllib2.urlopen('http://www.google.com')
urllib2.urlopen('https://www.google.com')
</code></pre>

blocks|key|1234782|text|除了被接受的答案:我的助手给了我一个错误|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1234783|File+"c:\Python23\lib\urllib2.py",+line+580,+in+proxy_open
++++if+'@'+in+host:
TypeError:+iterable+argument+required|code-block|syntax|javascript|1234784|解决方案是在代理字符串前面添加http://：|1234785|proxy+=+urllib2.ProxyHandler({'http':+'http://proxy.xy.z:8080'})
opener+=+urllib2.build_opener(proxy)
urllib2.install_opener(opener)
urllib2.urlopen('http://www.google.com')|1234786|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

In Addition to the accepted answer:
My scipt gave me an error 

<pre><code>File "c:\Python23\lib\urllib2.py", line 580, in proxy_open
 if '@' in host:
TypeError: iterable argument required
</code></pre>

Solution was to add http:// in front of the proxy string:

<pre><code>proxy = urllib2.ProxyHandler({'http': 'http://proxy.xy.z:8080'})
opener = urllib2.build_opener(proxy)
urllib2.install_opener(opener)
urllib2.urlopen('http://www.google.com')
</code></pre>

blocks|key|1449564|text|此外，设置命令行会话的代理打开可能要在其中运行脚本的命令行|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1449565|netsh+winhttp+set+proxy+YourProxySERVER:yourProxyPORT|code-block|syntax|javascript|1449566|在该终端中运行您的脚本。|1449567|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

In addition set the proxy for the command line session
Open a command line where you might want to run your script

<pre><code>netsh winhttp set proxy YourProxySERVER:yourProxyPORT
</code></pre>

run your script in that terminal.

blocks|key|1234887|text|如果我们想要使用代理访问网页，也可以使用请求。Python+3代码：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1234888|>>>+import+requests
>>>+url+=+'http://www.google.com'
>>>+proxy+=+'169.50.87.252:80'
>>>+requests.get(url,+proxies={"http":proxy})
<Response+[200]>|code-block|syntax|javascript|1234889|还可以添加多个代理。|1234890|>>>+proxy1+=+'169.50.87.252:80'
>>>+proxy2+=+'89.34.97.132:8080'
>>>+requests.get(url,+proxies={"http":proxy1,"http":proxy2})
<Response+[200]>|1234891|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

One can also use requests if we would like to access a web page using proxies. Python 3 code: 

<pre><code>&gt;&gt;&gt; import requests
&gt;&gt;&gt; url = 'http://www.google.com'
&gt;&gt;&gt; proxy = '169.50.87.252:80'
&gt;&gt;&gt; requests.get(url, proxies={"http":proxy})
&lt;Response [200]&gt;
</code></pre>

More than one proxies can also be added.

<pre><code>&gt;&gt;&gt; proxy1 = '169.50.87.252:80'
&gt;&gt;&gt; proxy2 = '89.34.97.132:8080'
&gt;&gt;&gt; requests.get(url, proxies={"http":proxy1,"http":proxy2})
&lt;Response [200]&gt;
</code></pre>

I open urls with:

<code>site = urllib2.urlopen('http://google.com')</code>

And what I want to do is connect the same way with a proxy
I got somewhere telling me:

<code>site = urllib2.urlopen('http://google.com', proxies={'http':'127.0.0.1'})</code>

but that didn't work either.

I know urllib2 has something like a proxy handler, but I can't recall that function.

Proxy with urllib2

Python

我用以下命令打开urls：site = urllib2.urlopen('http://google.com')我想要做的是以同样的方式连接到我在某处得到的代理：site = urllib2.urlopen('http://google.com', proxies={'http':'127.0.0.1'})但这也不管用...

问使用urllib2的代理
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