我已经安装了python 3.5，需要安装pywin（pywin 32）
但是pip找不到，注意，我刚刚PIP成功安装艾德send 2 trash和gitpython

Could not find a version that satisfies the requirement pywin32 (from versions: )

一些可能相关的数据点：

• 新安装的python 3.5
• windows 7 x64
• python 2.7先前已安装在计算机上
• 如前所述，其他几个软件包通过PIP安装得很好
• 从git-bash运行这些命令，git-bash来自git windows installer，安装了一段时间了。--我的路径中有gnu grep，所以我相信我选择了git installer选项来把整个mysys工具链放在我的路径中

full --详细输出：

C:\Users\USER>pip install  pywin32    --proxy http://proxy.COMPANY.com:8080
Collecting pywin32
  Could not find a version that satisfies the requirement pywin32 (from versions: )
No matching distribution found for pywin32

C:\Users\USER>pip install  pywin32    --proxy http://proxy.COMPANY.com:8080 --verbose
Config variable 'Py_DEBUG' is unset, Python ABI tag may be incorrect
Config variable 'WITH_PYMALLOC' is unset, Python ABI tag may be incorrect
Collecting pywin32
  1 location(s) to search for versions of pywin32:
  * https://pypi.python.org/simple/pywin32/
  Getting page https://pypi.python.org/simple/pywin32/
  Looking up "https://pypi.python.org/simple/pywin32/" in the cache
  Current age based on date: 61
  Freshness lifetime from max-age: 600
  Freshness lifetime from request max-age: 600
  The response is "fresh", returning cached response
  600 > 61
  Analyzing links from page https://pypi.python.org/simple/pywin32/
  Could not find a version that satisfies the requirement pywin32 (from versions: )
Cleaning up...
No matching distribution found for pywin32
Exception information:
Traceback (most recent call last):
  File "c:\users\USER\appdata\local\programs\python\python35\lib\site-packages\pip\basecommand.py", line 215, in main
    status = self.run(options, args)
  File "c:\users\USER\appdata\local\programs\python\python35\lib\site-packages\pip\commands\install.py", line 324, in run
    requirement_set.prepare_files(finder)
  File "c:\users\USER\appdata\local\programs\python\python35\lib\site-packages\pip\req\req_set.py", line 380, in prepare_files
    ignore_dependencies=self.ignore_dependencies))
  File "c:\users\USER\appdata\local\programs\python\python35\lib\site-packages\pip\req\req_set.py", line 554, in _prepare_file
    require_hashes
  File "c:\users\USER\appdata\local\programs\python\python35\lib\site-packages\pip\req\req_install.py", line 278, in populate_link
    self.link = finder.find_requirement(self, upgrade)
  File "c:\users\USER\appdata\local\programs\python\python35\lib\site-packages\pip\index.py", line 514, in find_requirement
    'No matching distribution found for %s' % req
pip.exceptions.DistributionNotFound: No matching distribution found for pywin32