pip install的时候报错timed out

安装包的时候报错，执行：pip install pyinstaller

问题：

File "c:\python\python35\lib\site-packages\pip\_vendor\requests\packages\urllib3\response.py", line 357, in stream
  data = self.read(amt=amt, decode_content=decode_content)
File "c:\python\python35\lib\site-packages\pip\_vendor\requests\packages\urllib3\response.py", line 324, in read
  flush_decoder = True
File "c:\python\python35\lib\contextlib.py", line 77, in __exit__
  self.gen.throw(type, value, traceback)
File "c:\python\python35\lib\site-packages\pip\_vendor\requests\packages\urllib3\response.py", line 237, in _error_catcher
  raise ReadTimeoutError(self._pool, None, 'Read timed out.')
p._vendor.requests.packages.urllib3.exceptions.ReadTimeoutError: HTTPSConnectionPool(host='pypi.python.org', port=443): Read timed out.

解决：

修改超时时间：

pip --default-timeout=1000 install -U pip

指定安装源进行安装：

pip install pyinstaller -i https://pypi.doubanio.com/simple