ubuntu14.04 安装Python3.9.1(最新版本)

1、下载

下载Python-3.9.1.tgz

2、安装需要的包zlib1g，libffi

sudo apt-get update
sudo apt-get install zlib1g-dev
sudo apt-get install libffi-dev

3、配置与编译

3.1 创建目录python3.9

sudo mkdir -p /usr/local/python3.9

3.2 解压Python-3.9.1.tgz

#解压得到目录Python-3.9.1
tar -zxvf  Python-3.9.1.tgz

3.3 配置

mv Python-3.9.1 /usr/local/python3.9
cd  /usr/local/python3.9/Python-3.9.1
./configure --prefix=/usr/local/python3.9/Python-3.9.1

3.4 编译

# pwd:/usr/local/python3.9/Python-3.9.1
make 

3.4 记录执行文件python路径

# pwd:/usr/local/python3.9/Python-3.9.1
find . -name "python"
#记录python路径:/usr/local/python3.9/Python-3.9.1/python

4、链接

sudo ln -sf /usr/local/python3.9/Python-3.9.1/python  /usr/bin/python3
sudo ln -sf /usr/local/python3.9/Python-3.9.1/python  /usr/bin/python(可选)

注意：以上步骤也可适合指定的python3版本