使用pip报错：Could not fetch URL https://pypi.org/simple/selenium/: There was a problem confirming the ss

 在使用pip安装python3的第三方包的时候出现了错误。
 错误如下：

pip is configured with locations that require TLS/SSL, however the ssl module in Python is not available.
Collecting selenium
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/selenium/
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/selenium/
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/selenium/
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/selenium/
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/selenium/
Could not fetch URL https://pypi.org/simple/selenium/: There was a problem confirming the ssl certificate: HTTPSConnectionPool(host=‘pypi.org’, port=443): Max retries exceeded with url: /simple/selenium/ (Caused by SSLError(“Can’t connect to HTTPS URL because the SSL module is not available.”)) - skipping
Could not find a version that satisfies the requirement selenium (from versions: )
No matching distribution found for selenium
pip is configured with locations that require TLS/SSL, however the ssl module in Python is not available.
Could not fetch URL https://pypi.org/simple/pip/: There was a problem confirming the ssl certificate: HTTPSConnectionPool(host=‘pypi.org’, port=443): Max retries exceeded with url: /simple/pip/ (Caused by SSLError(“Can’t connect to HTTPS URL because the SSL module is not available.”)) - skipping

解决的办法：
使用下面的命令的是:（其中的pywinauto是需要安装的包）

pip install pywinauto -i http://pypi.douban.com/simple --trusted-host pypi.douban.com

1)http://mirrors.aliyun.com/pypi/simple/ 阿里云
2)https://pypi.mirrors.ustc.edu.cn/simple/ 中国科技大学
3) http://pypi.douban.com/simple/ 豆瓣
4) https://pypi.tuna.tsinghua.edu.cn/simple/ 清华大学
5) http://pypi.mirrors.ustc.edu.cn/simple/ 中国科学技术大学

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