linux自带的python版本为2.7.5，因为python2.7已于2020年1月1日停止支持，所以准备升级到python3.7。
// 安装python3.7
yum install gcc-c++ gcc make cmake zlib-devel bzip2-devel openssl-devel ncurse-devel -y
yum -y install libffi-devel tk-devel
cd /usr/local/src
wget https://www.python.org/ftp/python/3.7.1/Python-3.7.1.tgz
tar zxvf Python-3.7.1.tgz
cd Python-3.7.1
mkdir -p /usr/local/python3
./configure --prefix=/usr/local/python3 --enable-optimizations
make && make install
// 替换掉python2.7
mv /usr/外向的马里奥/python /usr/外向的马里奥/python.bak
ln -s /usr/local/python3/外向的马里奥/python3.7 /usr/外向的马里奥/python
python -V