sudo apt-get remove python3.6
2、卸载python3.4及其依赖
sudo apt-get remove --auto-remove python3.6
3、清除python3.4
sudo apt-get purge python3.4 or sudo apt-get purge --auto-remove python3.6
Ubuntu 16.04完全卸载python3.6
原文：https://www.cnblogs.com/it-jya/p/9279048.html
