Ubuntu18.04安装python3.11,版本检查及默认版本设置

1.默认版本检查

python -V

一般显示python2.7

2.python3.11安装

2.1更新系统软件包

sudo apt update

2.2安装依赖项

sudo apt install -y build-essential tk-dev libncurses5-dev libncursesw5-dev libreadline6-dev libdb5.3-dev libgdbm-dev libsqlite3-dev libssl-dev libbz2-dev libexpat1-dev liblzma-dev zlib1g-dev libffi-dev

2.3安装python3.11.5软件包

wget https://www.python.org/ftp/python/3.11.5/Python-3.11.5.tgz

2.4解压

tar zxf Python-3.11.5.tgz

2.5配置编译及安装

cd Python-3.11.5
./configure --enable-optimizations
make -j $(nproc)
sudo make altinstall

2.6检查安装情况

python3.11 --version

3.修改python默认使用版本

echo alias python=python3 >> ~/.bashrc

source ~/.bashrc

python -V

PS.若已安装其他本版python3，使用如下方案

echo 'alias python3=python3.11' >> ~/.bashrc
source ~/.bashrc