Linux下安装python3并配置为系统默认版本

安装python3

1. 官网下载tar.gz压缩包
2. 解压压缩包
3. 进入解压后的文件夹并打开终端
4. 安装gcc编译环境

sudo zypper install -y gcc

5. 执行下列命令

./configure

6. 安装make包

sudo zypper install make

7. 安装zlib相关依赖包

sudo zypper install zlib*

8. 执行下列命令

make
sudo make install

修改系统默认版本为python3

执行下列命令

# sudo update-alternatives --list python  
update-alternatives: error: no alternatives for python 
# sudo update-alternatives --install /usr/bin/python python /usr/bin/python2.7 1  
update-alternatives: using /usr/bin/python2.7 to provide /usr/bin/python (python) in auto mode  
# sudo update-alternatives --install /usr/bin/python python /usr/bin/python3.4 2  
update-alternatives: using /usr/bin/python3.4 to provide /usr/bin/python (python) in auto mode