首先安裝依賴包，依賴包缺一不可，筆者曾安裝python3未成功就是因為沒有安裝libffi-devel

sudo yum -y groupinstall "Development tools"
sudo yum -y 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

然後獲取python3.7的安裝包

wget https://www.python.org/ftp/python/3.7.0/Python-3.7.0.tgz
 

解壓

cd ~/Download
tar -xzvf  Python-3.7.0.tar.xz

配置python3的安裝目錄並安裝

cd Python-3.7.0
./configure
sudo make
sudo make install

檢視軟連結，沒有建立

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

最後在命令列中輸入python3，能夠進入python3終端即成功安裝