今天在用pip1.5.6安装flask-mongoengine的时候报错退出
我执行的命令是

bashpip install flask-mongoengine

返回错误是

bashDownloading/unpacking flask-mongoengine
Cleaning up...
Exception:
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/pip/basecommand.py", line 122, in main
    status = self.run(options, args)
  File "/usr/lib/python2.7/dist-packages/pip/commands/install.py", line 278, in run
    requirement_set.prepare_files(finder, force_root_egg_info=self.bundle, bundle=self.bundle)
  File "/usr/lib/python2.7/dist-packages/pip/req.py", line 1177, in prepare_files
    url = finder.find_requirement(req_to_install, upgrade=self.upgrade)
  File "/usr/lib/python2.7/dist-packages/pip/index.py", line 194, in find_requirement
    page = self._get_page(main_index_url, req)
  File "/usr/lib/python2.7/dist-packages/pip/index.py", line 568, in _get_page
    session=self.session,
  File "/usr/lib/python2.7/dist-packages/pip/index.py", line 670, in get_page
    resp = session.get(url, headers={"Accept": "text/html"})
  File "/usr/lib/python2.7/dist-packages/requests/sessions.py", line 468, in get
    return self.request('GET', url, **kwargs)
  File "/usr/lib/python2.7/dist-packages/pip/download.py", line 237, in request
    return super(PipSession, self).request(method, url, *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/requests/sessions.py", line 456, in request
    resp = self.send(prep, **send_kwargs)
  File "/usr/lib/python2.7/dist-packages/requests/sessions.py", line 559, in send
    r = adapter.send(request, **kwargs)
  File "/usr/lib/python2.7/dist-packages/requests/adapters.py", line 327, in send
    timeout=timeout
  File "/usr/lib/python2.7/dist-packages/urllib3/connectionpool.py", line 491, in urlopen
    conn = self._get_conn(timeout=pool_timeout)
  File "/usr/lib/python2.7/dist-packages/urllib3/connectionpool.py", line 230, in _get_conn
    return conn or self._new_conn()
  File "/usr/lib/python2.7/dist-packages/urllib3/connectionpool.py", line 680, in _new_conn
    return self._prepare_conn(conn)
  File "/usr/lib/python2.7/dist-packages/urllib3/connectionpool.py", line 653, in _prepare_conn
    conn.connect()
  File "/usr/lib/python2.7/dist-packages/urllib3/connection.py", line 205, in connect
    self._tunnel()
  File "/usr/lib/python2.7/httplib.py", line 780, in _tunnel
    line = response.fp.readline(_MAXLINE + 1)
TypeError: readline() takes exactly 1 argument (2 given)

我看traceback怀疑是标准库的bug，就google了一下，发现了一个github上的issue,场景不一样但是引发了同样的bug。这个issue最后讨论的结论是这确实是个bug，但是相关的patch已经merge了，就是说问题应该已经解决了。我在issue后面回复了我的问题，不过还没有得到解决。不知道有没有哪位遇到过类似的问题并且已经解决了？
我的python版本是2.7.9，pip版本是1.5.6，系统是ubuntu14.10.