$schemamarkup = get_post_meta(get_the_ID(), 'schemamarkup', true); if(!empty($schemamarkup)) { echo $schemamarkup; }

How to Install Python 3 on CentOS Gnu/Linux 7

CentOS 7 Install Python 3 Easy Guide

Install Python 3 on CentOS GNU/Linux 7.x – Step by step Tutorial.

And Python 3 for CentOS 7 eliminates many Quirks that can unnecessarily trip up Beginning Programmers trying to Learn Python.
Python 2.x is legacy, Python 3.x is the Present and Future of the Language!

CentOS 7 Install Python 3 Easy Guide - Featured

CentOS Linux Python 3 Installation Guides