centos 8 安装 python3.9

1、准备编译环境

dnf groupinstall 'development tools'

dnf install bzip2-devel expat-devel gdbm-devel ncurses-devel openssl-devel readline-devel sqlite-devel tk-devel xz-devel zlib-devel wget

dnf install libffi-devel -y

2、下载

mkdir download

cd download

wget https://www.python.org/ftp/python/3.9.0/Python-3.9.0a6.tgz

3、编译&安装

tar -zxvf Python-3.9.0a6.tgz

cd Python-3.9.0a6

./configure --enable-optimizations

make && make altinstall

4、建立软连接

ln -s /usr/local/bin/python3.9 /usr/local/bin/python3

ln -s /usr/local/bin/pip3.9 /usr/local/bin/pip3

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CentOS8下升级Python3.6到3.9

1，官网下载Python3.9源码文件
- wget source_code_url
2，解压文件
- tar -zxvf Python3.9.x.tgz
3，安装必要的包 (~~根据提示，有就不用安装了~~)
- dnf -y install gcc zlib* libffi-devel
4，进入解压目录，进行编译和安装(根据需要自定义目录)
- cd python3.9_folder
- ./configure --prefix=/usr/local/bin/python3
- make&&make install
5，删除原先的命令，并建立新的软连接
- rm -rf /usr/bin/python3
- ln -s /usr/local/bin/python3/bin/python3 /usr/bin/python3
6，检查并验证
- python3 -V