CentOS 7.X 升级 Python 3.8.X

背景：

CentOS 7 默认的Python 是2.X，升级中经常遇到各种坑，现在提供一份操作手册。

1. 安装依赖关系

yum install -y libffi-devel zlib* openssl-devel -y 

2. 下载和安装python包 

cd /usr/local/src
wget https://www.python.org/ftp/python/3.8.3/Python-3.8.3.tgz
tar zxvf Python-3.8.3.tgz
cd Python-3.8.3/
./configure --prefix=/usr/local/python3.8 --with-ssl
make && make install

3. 修改软连接

ln -fs /usr/local/python3.8/bin/python3.8 /usr/bin/python
ln -fs /usr/local/python3.8/bin/pip3.8 /usr/bin/pip

 4.验证

[root@localhost Python-3.8.3]# python -V
Python 3.8.3

[root@localhost Python-3.8.3]# pip -V
pip 19.2.3 from /usr/local/python3.8/lib/python3.8/site-packages/pip (python 3.8)

5.修改yum文件

vi /usr/bin/yum

vi /usr/libexec/urlgrabber-ext-down

第一行改都修改为: (原因是安装了python3.8,CentOS 7.X 自带的yum采用的是python2.X，当系统将python升级到2.7 或3.X后，出现语法解释错误)

#!/usr/bin/python2.7

6.升级pip

python -m pip install --upgrade pip