centos 7 安装python3

1.安装依赖

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

2.下载并将下载的py放在指定目录下（楼主放在/app目录下）并解压至/app目录下

wget https://www.python.org/ftp/python/3.7.2/Python-3.7.2.tar.xz  
mkdir /app
cd /app 
tar xf Python-3.7.2.tar.xz

4.创建编译安装目录

mkdir /usr/local/python3 

5.进行编译安装

cd /app/Python-3.7.2/
./configure --prefix=/usr/local/python3
make && make install

6.设置软链接

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

7.验证是否安装成功

python3 -V
pip3 -V