Unable to import PyGI module 'Gtk' - No module named 'gi'

Question

I'm trying to run textest & on Mac to follow along GildedRose-Refactoring-Kata but I keep running into this error message

> texttest &
[1] 58365
peter.walker in ~/dev-projects/gildedrose-ruby-kata on branch main > Could not start TextTest 4.1.3 GUI due to PyGI/PyGObject GUI library problems :
Unable to import PyGI module 'Gtk' - No module named 'gi'

[1]  + exit 1     texttest

I have tried installing python3-gi but I'm confronted with

> pip3 install python3-gi
ERROR: Could not find a version that satisfies the requirement python3-gi (from versions: none)
ERROR: No matching distribution found for python3-gi

Answer 1

The GUI started running after brew install pygobject3 gtk+3