从需求文件中安装 pip 失败，但可以一一安装

我正在尝试使用 requests.txt 文件通过以下命令安装一堆 python 依赖项：

pip install -r requirements.txt

requirements.txt 文件包含以下包：

pep8
selenium
paramiko
soappy
nose
wmi
mock
python-keystoneclient
python-novaclient
python-cinderclient
python-swiftclient
python-glanceclient
python-heatclient
python-neutronclient

但是当运行 pip install 命令时，我收到此错误：

Downloading/unpacking PrettyTable>=0.7,<0.8 (from python-keystoneclient->-r requ
irements.txt (line 9))
Cleaning up...
Exception:
Traceback (most recent call last):
  File "C:\Python27\VirtualEnvs\test\lib\site-packages\pip\basecommand.py", line
 122, in main
    status = self.run(options, args)
  File "C:\Python27\VirtualEnvs\test\lib\site-packages\pip\commands\install.py",
 line 278, in run
    requirement_set.prepare_files(finder, force_root_egg_info=self.bundle, bundl
e=self.bundle)
  File "C:\Python27\VirtualEnvs\test\lib\site-packages\pip\req.py", line 1197, i
n prepare_files
    do_download,
  File "C:\Python27\VirtualEnvs\test\lib\site-packages\pip\req.py", line 1375, i
n unpack_url
    self.session,
  File "C:\Python27\VirtualEnvs\test\lib\site-packages\pip\download.py", line 54
6, in unpack_http_url
    resp = session.get(target_url, stream=True)
  File "C:\Python27\VirtualEnvs\test\lib\site-packages\pip\_vendor\requests\sess
ions.py", line 395, in get
    return self.request('GET', url, **kwargs)
  File "C:\Python27\VirtualEnvs\test\lib\site-packages\pip\download.py", line 23
7, in request
    return super(PipSession, self).request(method, url, *args, **kwargs)
  File "C:\Python27\VirtualEnvs\test\lib\site-packages\pip\_vendor\requests\sess
ions.py", line 383, in request
    resp = self.send(prep, **send_kwargs)
  File "C:\Python27\VirtualEnvs\test\lib\site-packages\pip\_vendor\requests\sess
ions.py", line 486, in send
    r = adapter.send(request, **kwargs)
  File "C:\Python27\VirtualEnvs\test\lib\site-packages\pip\_vendor\requests\adap
ters.py", line 381, in send
    raise ProxyError(e)
ProxyError: Cannot connect to proxy. Socket error: [Errno 10054] An existing con
nection was forcibly closed by the remote host.

Storing debug log for failure in C:\Users\cjmarti2\pip\pip.log

但由于某种原因，如果我使用安装所有软件包pip install <package>它们都已正确安装。

有几点需要考虑； 1）由于我在公司的内联网中，所以我使用以下命令设置代理set https_proxy=https://company-proxy.com:port。 2) 在 Linux 计算机中使用requirements.txt 安装完全相同的软件包效果很好。有任何想法吗？

Update:我使用的是 64 位的 Python 2.7。我把它卸载了，安装了32位的，就没有这个问题了。看起来 python 版本是问题所在，64 位版本由于某种原因导致了问题。