Centos7安装Python3.8

Centos7安装Python3.8

安装编译相关工具

yum -y groupinstall "Development tools"

yum -y install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gdbm-devel db4-devel libpcap-devel xz-devel

yum -y install libffi-devel

下载python安装包

wget https://www.python.org/ftp/python/3.8.7/Python-3.8.7.tar.xz 
tar -xvf  Python-3.8.7.tar.xz

编译安装python

mkdir /usr/local/python3 #创建编译安装目录
cd Python-3.8.7./configure --prefix=/usr/local/python3
make && make install

安装过，出现下面两行就成功了

Installing collected packages: setuptools, pip
Successfully installed pip-19.2.3 setuptools-41.2.0```

创建软连接

# 查看当前python软连接ll /usr/bin/ |grep python

lrwxrwxrwx    1 root root            7 Jul 23  2020 python -> python2
lrwxrwxrwx    1 root root            9 Jul 23  2020 python2 -> python2.7
-rwxr-xr-x    1 root root         7144 Apr  2  2020 python2.7

默认系统安装的是python2.7，留着不动

配置软连接python3

#添加python3的软链接 
ln -s /usr/local/python3/bin/python3 /usr/bin/python3

这个时候看下python默认版本

python -V>>>>>Python 2.7.5
python3 -V>>>>>Python 3.8.7

删除默认pip软连接，并添加pip3新的软连接

ll /usr/bin/ |grep pip
#添加 pip3 的软链接 
ln -s /usr/local/python3/bin/pip3 /usr/bin/pip3

# 验证
pip -V>>>>>pip 8.1.2 from /usr/lib/python2.7/site-packages (python 2.7)

pip3 -V>>>>>pip 20.2.3 from /usr/local/python3/lib/python3.8/site-packages/pip (python 3.8)