ubuntu下卸載python2和升級python3.5

卸載python只需一條語句就可以實現

sudu apt-get remove python

ubuntu下安裝python3

sudo apt-get install python3

但這樣只安裝了python3.4

要想使用python3.5，則必須升級python3.4

 

sudo add-apt-repository ppa:fkrull/deadsnakes
sudo apt-get update
sudo apt-get install python3.5

使用以上三行命令便可升級python3.4到python3.5

啓動時要輸入python3.5

 

輸入python時啓動的是python2.7

輸入python3時啓動的是python3.4

輸入python3.5時啓動的纔是python3.5