Centos7安装Python3

wget https://www.python.org/ftp/python/3.7.7/Python-3.7.7.tgz

yum install y gcc gcc-c++ zlib-devel readline-devel openssl-devel libffi-devel

tar xf Python-3.7.7.tgz

./configure –prefix=/usr/local/python-3.7.7 –with-ssl

make && make install

备份python2.7软连接

mv /usr/bin/python /usr/bin/python.bak

创建python3.7软连接

ln -s /usr/local/python-3.7.7/bin/python3.7 /usr/bin/python

ln -s /usr/local/python-3.7.7/bin/pip3 /usr/bin/pip

查看是否生效

python -V

pip -V

修改yum配置文件

因为yum使用python2，因此替换为python3后无法正常工作。

修改文件/usr/bin/yum；/usr/libexec/urlgrabber-ext-down

把文件头部的#!/usr/bin/python改成#!/usr/bin/python2.7保存退出即可