open-with.py

#!/usr/bin/env python3
#
# Open With Nautilus Extension.
#
# Install python-nautilus and put this in ~/.local/share/nautilus-python/extensions/.

from gi import require_version

require_version("Gtk", "3.0")
require_version("Nautilus", "3.0")
from gi.repository import Nautilus, GObject
from subprocess import call
import os

# Change this if needed.
EXEC = "gvim"
NAME = "GVim"


class OpenWithExtension(GObject.GObject, Nautilus.MenuProvider):
    def launch(self, menu, files):
        safepaths = ""
        for file in files:
            filepath = file.get_location().get_path()
            safepaths += '"' + filepath + '" '

        call(EXEC + " " + safepaths, shell=True)

    def get_file_items(self, _window, files):
        item = Nautilus.MenuItem(
            name=NAME + "Open",
            label="Open With " + NAME,
            tip="Opens the selected files with " + NAME,
        )
        item.connect("activate", self.launch, files)

        return [item]

    def get_background_items(self, _window, file_):
        item = Nautilus.MenuItem(
            name=NAME + "OpenBackground",
            label="Open " + NAME + " Here",
            tip="Opens " + NAME + " in the current directory",
        )
        item.connect("activate", self.launch, [file_])

        return [item]