Output the filepath(s) of any GTK icon names provided as arguments.

gtk-icon-path.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# https://gist.github.com/daniel-barrows/3a42d6ac96559534a7a52172083730c2
__copyright__ = "2018 Daniel Barrows"
__license__   = "Public Domain"
__status__    = "production"

import sys
import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk

EXIT_FILE_NOT_FOUND = 2

return_code = 0
icon_theme = Gtk.IconTheme.get_default()
for icon_name in sys.argv[1:]:
    icon_info = icon_theme.lookup_icon(icon_name, 48, 0)
    if icon_info:
        print(icon_info.get_filename())
    else:
        print("ERROR: No icon found named %s" % icon_name, file=sys.stderr)
        return_code = return_code or EXIT_FILE_NOT_FOUND
exit(return_code)