linux centos环境下安装python3.7

linux python3.7 centos安装
https://www.python.org/ftp/python/3.7.0/Python-3.7.0.tgz 下载地址

1.首先安装gcc编译器，gcc有些系统版本已经默认安装，通过 gcc --version 查看，没安装的先安装gcc，
yum -y install gcc

2.安装其它依赖包
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

(非必须)yum -y install "Development tools"

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

4.下载安装包
wget https://www.python.org/ftp/python/3.7.0/Python-3.7.0.tgz 或者手动下载移到服务器

5.解压
tar -zxvf Python-3.7.0.tgz

6.执行配置文件，配置安装目录，编译，编译安装
cd Python-3.7.0
./configure --prefix=/usr/local/python3
make
make install
由于给的机器内存较小，内存使用率一般在95%左右,make时报错：
# gcc: 编译器内部错误：已杀死(程序 cc1)
gcc: internal compiler error: Killed (pr