1. 查看当前默认版本和存放位置
2. 安装python3.8
2. 删除原软连接,生成新版本软连接
python -V
输出:Python 2.7.17
whereis python
or
which python
输入:python: /usr/bin/python2.7 /usr/bin/python3.6 /usr/bin/python2.7-config /usr/bin/python3.8 /usr/bin/python /usr/bin/python3.6m-config /usr/bin/python3.6m /usr/bin/python3.6-config /usr/lib/x86_64-linux-gnu/python2.7 /usr/lib/python2.7 /usr/lib/python3.6 /usr/lib/python3.8 /usr/lib/python3.7 /etc/python2.7 /etc/python3.6 /etc/python3.8 /etc/python /usr/local/lib/python2.7 /usr/local/lib/python3.6 /usr/local/lib/python3.8 /usr/include/python2.7 /usr/include/python3.6 /usr/include/python2.7_d /usr/include/python3.6m /usr/share/python /usr/share/man/man1/python.1.gz
安装python3.8
以root用户或具有sudo访问权限的用户身份运行以下命令,以更新软件包列表并安装必备组件
sudo apt update
sudo apt install software-properties-common
将PPA源地址添加到系统的源列表中:
sudo add-apt-repository ppa:deadsnakes/ppa
出现提示时,按Enter键继续:
启用ppa库后,使用以下命令安装Python 3.8:
sudo apt install python3.8
查看python版本:
python3.8 --version
根据位置,切换至目录
cd /usr/bin
查看包含python的文件名
ls | grep python
删除原软连接
sudo rm python
创建新的软连接
sudo ln -s python3.8 python
再次查看版本
python -V
在安装一些软件的时候,如果报错,最后再更新一下pip
python -m pip install --upgrade pip
## Give python3 another name:
alias python=/usr/bin/python3
list the name
alias
uname
unalias python
write alias in the ~/.bashrc file.
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