首先安装依赖包，centos里面是-devel，如果在ubuntu下安装则要改成-dev，依赖包缺一不可，一步一步复制到终端执行就可以！
sudo yum -y groupinstall "Development tools"
sudo 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 libffi-devel然后下载python3.7的安装包(目前更新到了python3.7.3)
wget https://www.python.org/ftp/python/3.7.3/Python-3.7.3.tar.xz解压下载包
tar -xvJf Python-3.7.3.tar.xz编译安装
cd Python-3.7.3
./configure --prefix=/usr/local/bin/python3
sudo make
sudo make install创建软连接
ln -s /usr/local/bin/python3/bin/python3 /usr/bin/python3
ln -s /usr/local/bin/python3/bin/pip3 /usr/bin/pip3最后输入命令python3 --version检查一下是否安装成功