Adds ability to go up a directory by pressing Backspace button in nautilus. This will work with the new Nautilus 43/Gnome 43/Gtk4

	# Nautilus Backspace Back Extension
	#
	# Place me in ~/.local/share/nautilus-python/extensions/,
	# ensure you have python-nautilus package, restrart Nautilus, and enjoy :)
	#
	# This script was written by molaeiali and is released to the public domain

	import os, gi
	gi.require_version('Nautilus', '4.0')
	from gi.repository import GObject, Nautilus, Gtk, Gio, GLib

	def back():
	app = Gtk.Application.get_default()
	if not app.get_actions_for_accel("BackSpace"):
	app.set_accels_for_action( "win.up", ["BackSpace"] )


	class BackspaceBack(GObject.GObject, Nautilus.InfoProvider):
	def __init__(self):
	pass

	def update_file_info(self, file):
	back()
	return None