Ubuntu16.04怎樣安裝Python3.6

Ubuntu16.04默認安裝了Python2.7和3.5

請注意，系統自帶的python千萬不能卸載！

輸入命令python

按Ctrl+D退出python命令行

輸入命令sudo add-apt-repository ppa:jonathonf/python-3.6

按Enter確認

輸入命令sudo apt-get update

輸入命令sudo apt-get install python3.6

按Y確認

 

調整Python3的優先級，使得3.6優先級較高

sudo update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.5 1

sudo update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.6 2

更改默認值，python默認為Python2，現在修改為Python3

sudo update-alternatives --install /usr/bin/python python /usr/bin/python2 100

sudo update-alternatives --install /usr/bin/python python /usr/bin/python3 150

 

此時再輸入命令python

可以看到此時已經是Python3.6了

 

sudo add-apt-repository ppa:jonathonf/python-3.6命令會導致報錯，提示Cannot add PPA: 'ppa:~jonathonf/ubuntu/python-3.6'.
The user named '~jonathonf' has no PPA named 'ubuntu/python-3.6'

需更改成：sudo add-apt-repository ppa:deadsnakes/ppa