Ubuntu 16.04完全卸载python3.6

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

文章来自：https://www.cnblogs.com/it-jya/p/9279048.html