安装Python
yum install -y zlib zlib-dev openssl-devel sqlite-devel bzip2-devel libffi libffi-devel gcc gcc-c++
wget http://www.openssl.org/source/openssl-1.1.1.tar.gz
tar -zxvf openssl-1.1.1.tar.gz
cd openssl-1.1.1
./config --prefix=$HOME/openssl shared zlib
make && make install
echo "export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$HOME/openssl/lib" >> $HOME/.bash_profile
source $HOME/.bash_profile
yum install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gcc make libffi-devel -y
yum install python-pip -y
wget https://www.python.org/ftp/python/3.7.0/Python-3.7.0.tgz
tar -zxvf Python-3.7.0.tgz
./configure prefix=/usr/local/python3 --with-openssl=$HOME/openssl
make && make install
ln -s /usr/local/python3/bin/python3.7 /usr/bin/python3.7
ln -s /usr/local/python3/bin/pip3.7 /usr/bin/pip3.7
首先要安装openssl，因为python3需要引用openssl模块，但是centos需要的openssl版本最低为1.0.2，但是centos 默认的为1.0.1，所以需要重新更新openssl 。
