python3的安装

yum install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gdbm-devel db4-devel libpcap-devel xz-devel libffi-devel -y

wget https://www.python.org/ftp/python/3.7.3/Python-3.7.3.tgz
tar zxvf Python-3.7.3.tgz
cd Python-3.7.3 && ./configure --prefix=/usr/local/python3
make && make install

ln -s /usr/local/python3/bin/python3.7 /usr/bin/python3
ln -s /usr/local/python3/bin/pip3 /usr/bin/pip3

python3 --version
pip3 --version