CentOS7编译安装Python3.9

安装依赖
yum install openssl-devel bzip2-devel expat-devel gdbm-devel readline-devel sqlite-devel

#下载安装包。更多版本见https://www.python.org/ftp/python 
wget https://www.python.org/ftp/python/3.9.6/Python-3.9.6.tgz

#解压并进入目录
tar xzvf Python-3.9.6.tgz
cd Python-3.9.6

#设置默认安装目录
mkdir /usr/local/python3
./configure -prefix=/usr/local/python3

#编译安装
make && make install

#建立链接
ln -s /usr/local/python3/bin/python3 /usr/bin/python3   #为python3创建软连接
ln -s /usr/local/python3/bin/pip3 /usr/bin/pip3   #为pip3创建软连接

#测试安装是否成功
python3 -V
pip3 -V

#为python3安装virtualenv
pip3 install virtualenv

echo "PATH=\PATH:/usr/local/python3/bin" >> /etc/profile

#让etc/profile生效
source /etc/profile

#检查是否添加成功
echoPATH