Python中pip安装包出现Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection

Python使用pip安装程序报错:

  Collecting sphinx
    Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.",)': /simple/sphinx/
    Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.",)': /simple/sphinx/
    Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.",)': /simple/sphinx/
    Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.",)': /simple/sphinx/
    Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.",)': /simple/sphinx/

报错原因：

可能是连接国外镜像源超时导致(使用pip默认镜像源安装模块一直比较慢)

解决办法:

改为国内镜像源下载

  清华：https://pypi.tuna.tsinghua.edu.cn/simple/
  阿里云：http://mirrors.aliyun.com/pypi/simple/
  中国科技大学 https://pypi.mirrors.ustc.edu.cn/simple/
  华中理工大学：http://pypi.hustunique.com/
  山东理工大学：http://pypi.sdutlinux.org/
  豆瓣：http://pypi.douban.com/simple/

使用阿里镜像源进行安装

  pip install sphinx sphinx-autobuild sphinx_rtd_theme -ihttp://mirrors.aliyun.com/pypi/simple/ --trusted-host mirrors.aliyun.com

参数说明：

  pip install sphinx sphinx-autobuild sphinx_rtd_theme  -i http://mirrors.aliyun.com/pypi/simple/ --trusted-host mirrors.aliyun.com
  sphinx sphinx-autobuild sphinx_rtd_theme 需要安装的包名
  -i 指定镜像源地址
  --trusted-host ：后边指的是host,例阿里镜像源地址为 http://mirrors.aliyun.com/pypi/simple/，host就是指http://和/之间的部分，即mirrors.aliyun.com