Install Python 3.9 on Centos 7 or 8

CentOS has python2.7.5 and python3.6.8 inculded. I'd like to have latest python installed for some new features.

Remove default python3

yum remove python3

Install prerequisite packages

yum update -y
yum groupinstall -y 'Development Tools'
yum install -y gcc openssl-devel bzip2-devel libffi-devel

Download python source code

Pyhon source code can be found here(FTP server).

wget https://www.python.org/ftp/python/3.9.6/Python-3.9.6.tar.xz
tar zxf Python-3.9.6.tgz
cd Python-3.9.6

Compile and install

./configure prefix=/usr/local/python3.9
make
make install
ln -s /usr/local/python3.9/bin/python3.9 /usr/bin/python3
ln -s /usr/local/python3.9/bin/pip3.9 /usr/bin/pip3

Verify

python3 --verion
pip3 --version

Now we are good to go!

Optional: change pip registry

pip3 config set global.index-url https://pypi.tuna.tsinghua.edu.cn/simple

or just change registry temperarily:

pip3 install docker-compose -i https://pypi.tuna.tsinghua.edu.cn/simple