python - ノーズ テスト フレームワークをインストールできません

Question

pipを使用してnoseをインストールしようとしましたが、インストールは次のエラーメッセージで終了しました:

    Downloading/unpacking nose
  Downloading nose-1.3.0.tar.gz (404Kb): 286Kb downloaded
Exception:
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/pip/basecommand.py", line 104, in main
    status = self.run(options, args)
  File "/usr/lib/python2.7/dist-packages/pip/commands/install.py", line 245, 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 985, in prepare_files
    self.unpack_url(url, location, self.is_download)
  File "/usr/lib/python2.7/dist-packages/pip/req.py", line 1109, in unpack_url
    retval = unpack_http_url(link, location, self.download_cache, self.download_dir)
  File "/usr/lib/python2.7/dist-packages/pip/download.py", line 451, in unpack_http_url
    download_hash = _download_url(resp, link, temp_location)
  File "/usr/lib/python2.7/dist-packages/pip/download.py", line 368, in _download_url
    chunk = resp.read(4096)
  File "/usr/lib/python2.7/socket.py", line 380, in read
    data = self._sock.recv(left)
  File "/usr/lib/python2.7/httplib.py", line 561, in read
    s = self.fp.read(amt)
  File "/usr/lib/python2.7/socket.py", line 380, in read
    data = self._sock.recv(left)
timeout: timed out

これを修正するにはどうすればよいですか?