python2.7升级到python3.7,同时保留旧版python2.7和新版本python3.7共存。python2.7运行:/usr/bin/python2.7 python3.7运行:/usr/bin/python 。
一、查看当前python版本python -V
二、下载python3.7源码包并解压wget -c https://www.python.org/ftp/python/3.7.3/Python-3.7.3.tgz
tar -xzvf Python-3.7.3.tgz
三、配置和编译安装./configure
make && make install
四、查看旧版python2.7位置
whereis python
/usr/bin/python2.7
五、删除旧版pythonrm -f /usr/bin/python
六、重新指定python3.7链接到python命令ln -s /usr/local/bin/python3.7 /usr/bin/python
python -V
pip更新到python3.7:rm -f /usr/bin/pip
ln -s /usr/local/bin/pip3.7 /usr/bin/pip