Centos7下安装python3.x

安装依赖

Ubuntu/Debian下需安装的依赖：

sudo apt-get install -y gcc make cmake build-essential libssl-dev zlib1g-dev 
libbz2-dev libreadline-dev libsqlite3-dev wget curl llvm libncurses5-dev libncursesw5-dev xz-utils tk-dev libffi-dev liblzma-dev python-openssl

Fedora/CentOS/RHEL(aws ec2)下需安装的依赖：

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

下载安装包

https://www.python.org/ftp/python/

cd /usr/local/

wget https://www.python.org/ftp/python/3.7.0/Python-3.7.0.tgz

解压、编译、安装

解压
tar -zxvf Python-3.7.0.tgz

建立一个空文件夹，用于存放python3程序
mkdir /usr/local/python3

执行配置文件，编译，编译安装
cd Python-3.7.0
./configure --prefix=/usr/local/python3
make && make install

创建软连接

ln -s /usr/local/python3/bin/python3.7 /usr/bin/python3
ln -s /usr/local/python3/bin/pip3.7 /usr/bin/pip3