Ignoring ensurepip failure: pip 8.1.1 requires SSL/TLS

• 我的是Ubuntu18.04安装Python3.5.2执行 sudo make install最后提示Ignoring ensurepip failure: pip 8.1.1 requires SSL/TLS，pip没安好。
• 解决方案，安装ssl相关的:

apt-get install libssl-dev
apt-get install make build-essential libssl-dev zlib1g-dev libbz2-dev libsqlite3-dev
sudo apt-get install libssl1.0

• 如果是centos用:

yum install openssl-devel

• 最终能看到pip是安装好了