First, check the current version of Python
python -V
Second, download and install the new package python
1, yum update source
yum update
2, the installation dependencies
yum install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel libffi-devel gcc make
3, download the source code and compile and install python
wget https://www.python.org/ftp/python/3.8.2/Python-3.8.2.tgz tar xvf Python-3.8.2.tgz cd Python-3.8.2 ./configure --prefix=/usr/local/python3 make && make install
4, add a soft link
mv /usr/bin/python /usr/bin/python.bak ln -s /usr/local/python3/bin/python3 /usr/bin/python
In this way the system's default python version upgrade to python3 slightly