python - 複数のプロキシを使用して urllib2 のリンクを開く

Question

私がやろうとしているのは、行(IPアドレス)を読み取り、そのアドレスでWebサイトを開き、ファイル内のすべてのアドレスで繰り返すことです. 代わりに、エラーが発生します。私はpythonが初めてなので、単純な間違いかもしれません。前もって感謝します ！！！

コード：

>>> f = open("proxy.txt","r");          #file containing list of ip addresses
>>> address = (f.readline()).strip();      # to remove \n at end of line
>>> 
>>> while line:
        proxy = urllib2.ProxyHandler({'http': address })
        opener = urllib2.build_opener(proxy)
        urllib2.install_opener(opener)
        urllib2.urlopen('http://www.google.com')
        address = (f.readline()).strip();

エラー：

Traceback (most recent call last):
  File "<pyshell#15>", line 5, in <module>
    urllib2.urlopen('http://www.google.com')
  File "D:\Programming\Python\lib\urllib2.py", line 126, in urlopen
    return _opener.open(url, data, timeout)
  File "D:\Programming\Python\lib\urllib2.py", line 394, in open
    response = self._open(req, data)
  File "D:\Programming\Python\lib\urllib2.py", line 412, in _open
    '_open', req)
  File "D:\Programming\Python\lib\urllib2.py", line 372, in _call_chain
    result = func(*args)
  File "D:\Programming\Python\lib\urllib2.py", line 1199, in http_open
    return self.do_open(httplib.HTTPConnection, req)
  File "D:\Programming\Python\lib\urllib2.py", line 1174, in do_open
    raise URLError(err)
URLError: <urlopen error [Errno 10060] A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond>