CentOS安装Python3

建议Python2和Python3并存，此处补充安装Python3,不卸载系统自带的Python2.7

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!

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

cd /usr/local/python3
# 下载解压
wget https://www.python.org/ftp/python/3.7.3/Python-3.7.3.tar.xz
tar xvf Python-3.7.3.tar.xz
mv Python-3.7.3 python3.7
cd python3.7

./configure --prefix=/usr/local/python3/python3.7 --enable-optimizations

# make 15分钟左右
make
make install

# 创建软链接
ln -s /usr/local/python3/python3.7/bin/python3.7 /usr/bin/python3
ln -s /usr/local/python3/python3.7/bin/pip3 /usr/bin/pip3

参考：

https://blog.csdn.net/elija940818/article/details/79238813

https://blog.csdn.net/juewuer/article/details/85118606

https://blog.csdn.net/qq_34889607/article/details/82887187