CentOS 7 安装python3.8

安装python3.8

1. # wget https://www.python.org/ftp/python/3.8.1/Python-3.8.1.tgz  ！获取Python软件包

2. # tar -zxvf Python-3.8.1.tgz  ！解压

3. # cd Python-3.8.1

4. # yum -y install libffi-devel zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gcc make ！安装相关依赖

5. # ./configure  ！检查当前环境是否满足要安装软件的依赖关系

6. # make && make install  ！编译

注：zlib和zlib-devel的区别为zlib-devel为开发版，而zlib为运行版。

若wget没有安装，则：

# yum -y install wget

环境变量修改

1. # vi ~/.bashrc

2. PATH=$PATH:$HOME/bin:/usr/local/python3.8.1/bin

3. source ~/.bashrc

4. # python3  ！检查版本

更新python默认指向

1. # ls -l /usr/bin | grep python  ！查看python命令指向

2. # sudo mv /usr/bin/python /usr/bin/python.bak  !备份
   # sudo ln -s /usr/local/bin/python3 /usr/bin/python  ！更新

3. # python  ！检查版本

更改yum文件，否则安装其他包时会出错。

# vim /usr/bin/yum
# vim /usr/libexec/urlgrabber-ext-down

将两个文件的首行#!/usr/bin/python改为#!/usr/bin/python2