安装较新版本python3
1. 安装依赖包
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
2. 进入下载：https://www.python.org/ftp/python/
方法1：选择相应版本，直接点击下载，下载完成后上传至Linux系统
方法2：wget https://www.python.org/ftp/python/3.9.0/Python-3.8.8.tar.xz
3. 创建相应目录
- mkdir /usr/local/python3
- mkdir ~/myApp
- cd ~/myApp
- tar xvf Python-3.8.8.tar.xz
- cd Python-3.8.8
- ./configure --prefix=/usr/local/python3
- make && make install
- 安装python3时会自动安装python-pip,
- 若没有，可自动安装：yum -y install python-pip
4. 安装成功后，创建软链接
- 先将旧版本的备份：
- cp /usr/bin/python /usr/bin/python.bak
- cp /usr/bin/pip3 /usr/bin/pip3.bak
- ln -s /usr/local/bin/python3 /usr/bin/python3,
- ln -s /usr/local/bin/pip3 /usr/bin/python3
- 或直接将新的拷贝至指定目录
- cp /usr/local/bin/python3 /usr/bin/python3
- cp /usr/local/bin/pyip3 /usr/bin/pyip3
