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

How to Install WxPython Python 3 on Gnu/Linux Distros

wxPython Python3 Linux Installation Guide

Hi! The Tutorial shows you Step-by-Step How to Install wxPython Python 3 in GNU/Linux Distributions.

And wxPython for Linux is the Best and Most Mature Python Cross-Platform GUI Toolkit, given a number of constraints.
The only reason wxPython isn’t the Standard Python GUI Toolkit is that Tkinter was there first.

Finally, the wxPython Python3 Release is Now Available under the PyPi Packages Repository.

Installing wxPython Python 3 on Linux - Featured

Linux wxPython Python 3 Installation Guides