卸载:https://blog.csdn.net/m0_37407756/article/details/77968724

安装:https://www.runoob.com/python3/python3-install.html

python3.7调整优先级:

https://www.cnblogs.com/yjlch1016/p/8641910.html

 

设置python3为默认版本

直接执行这两个命令即可:

sudo update-alternatives --install /usr/bin/python python /usr/bin/python2 100
sudo update-alternatives --install /usr/bin/python python /usr/bin/python3 150

如果要切换到Python2,执行:

sudo update-alternatives --config python

 

 

2、ubuntu16.04自带python3.5升级到3.6

Ubuntu自带版本是python2.7和3.5  见:  https://www.cnblogs.com/laosan007/p/11737744.html

输入命令

复制代码
sudo apt-get install software-properties-common

sudo add-apt-repository ppa:jonathonf/python-3.6

sudo apt-get update

sudo apt-get install python3.6
复制代码

期间有需要按Yes哦

调整Python3的优先级,使得3.6优先级较高

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

现在系统python默认为Python2,需要修改为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

现在再输入python就会出现最新的3.6.7版本了

这个时候使用pip -V查询,会发现pip还是python3.5的pip,如何指向python3.6呢,首先是删除pip

apt-get remove python3-pip
apt-get autoremove

然后再安装pip

apt-get install python3-pip

发现pip还是指向 python3.5的,这个时候再用python3.6指定升级一下pip:

python3.6 -m pip install --upgrade pip

 

 

ko

 

 

 

 

 

sudo update-alternatives --config python



posted on 2021-07-18 23:29  lshan  阅读(165)  评论(0编辑  收藏  举报