安装pyspark时报错——Could not fetch URL https://pypi.org/simple/pyspark/

报错如下：

 Could not fetch URL https://pypi.org/simple/pyspark/: There was a problem confirming the ssl certificate: HTTPSConnectionPool(host='pypi.org', port=443): Max retries exceeded with url: /simple/pyspark/ (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 pyspark (from versions: )
No matching distribution found for pyspark
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

解决办法;

pip3 install pyspark -i http://pypi.douban.com/simple --trusted-host pypi.douban.com

ps:linux中安装的时python3.6版本，所以使用pip3

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