wget https://www.python.org/ftp/python/3.7.1/Python-3.7.1.tgz
prefix是指定python安装的位置
cd Python-3.7.1
./configure --prefix=/home/work/envs/python3.7.1 && make && make install
ln -s /home/work/envs/python3.7.1/bin/python3 /usr/bin/python3.7.1
ln -s /home/work/envs/python3.7.1/bin/pip3 /usr/bin/pip3.7.1