add sxiv's marked item in gtk recent used list

#!/usr/bin/env python3
# run python3 ~/.bin/add_item_gtk3.py after exiting sxiv
import gi
gi.require_version('Gtk', '3.0')
from gi.repository import GLib, Gtk

f = open('/tmp/sxiv-marked')
recent_mgr = Gtk.RecentManager.get_default()
for files in f:
    line = r'file://'+str(files)
    line = ('%r' % line)[1:-3]
    recent_mgr.add_item(line)

GLib.idle_add(Gtk.main_quit)
Gtk.main()
f.close()