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

How to Install WxPython Python 3 on Mint Gnu/Linux Distro

GNU/Linux Mint Installing Python 3 wxPython Guide

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

Especially relevant: an Equivalent wxPython Linux Mint Setup may be achieved on Anaconda Python instead that for the System one like here!

And wxPython for Linux Mint 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.

Installing wxPython Python 3 for Linux Mint - Featured

GNU/Linux Mint wxPython Python 3 Toolkit Installation Guide