linux centos 7.x 安装 python3.x 替换 python2.x的过程解析

yum install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gcc make

yum -y install epel-release

curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py

python get-pip.py

pip -V

# pip 版本展示如下
pip 20.3.1 from /usr/local/python3/lib/python3.6/site-packages/pip (python 3.6)

pip install wget

wget https://www.python.org/ftp/python/3.6.8/Python-3.6.8.tar.xz

xz -d Python-3.6.8.tar.xz
tar -xf Python-3.6.8.tar

cd Python-3.6.8
./configure prefix=/usr/local/python3

configure: error: in `/root/Python-3.6.8':
configure: error: no acceptable C compiler found in $PATH
See `config.log' for more details


# 执行命令
yum install -y gcc

make && make install

yum install zlib zlib
yum install zlib zlib-devel

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

ln -s /usr/local/python3/bin/python3.6 /usr/bin/python

python -V

# python 版本展示
Python 3.6.8

# 把文件头部的 #! /usr/bin/python 改成 #! /usr/bin/python2.7
vi /usr/bin/yum
# 把文件头部的 #! /usr/bin/python 改成 #! /usr/bin/python2.7
vi /usr/libexec/urlgrabber-ext-down
# 把文件头部的 #! /usr/bin/python 改成 #! /usr/bin/python2.7
# 如果没有此文件，就不必修改
vi /usr/bin/yum-config-manager

yum install tree -y