Modernize examples

The example extension scripts need to be in sync with new versions of
referenced foreign packages.
This commit also makes them compatible with Python version 3 (retaining
Python 2 compatibility).
An additional example extension "mixed" is added: it implements all caja
extension features and can also be used as a new extension pattern. See
source header comment for a description.

Ref: https://github.com/mate-desktop/python-caja/pull/34#issuecomment-457257832

1 files changed, 8 insertions, 2 deletions

diff --git a/examples/open-terminal.py b/examples/open-terminal.py
index 1d0e5aa..c80552a 100644
--- a/examples/open-terminal.py
+++ b/examples/open-terminal.py
@@ -1,6 +1,12 @@
 # This example is contributed by Martin Enlund
 import os
-import urllib
+
+try:
+    # Python 3.
+    from urllib.parse import unquote
+except:
+    # Python 2.
+    from urllib import unquote
 
 from gi.repository import Caja, GObject, Gio
 
@@ -12,7 +18,7 @@ class OpenTerminalExtension(Caja.MenuProvider, GObject.GObject):
         self.gsettings = Gio.Settings.new(TERMINAL_SCHEMA)
         
     def _open_terminal(self, file):
-        filename = urllib.unquote(file.get_uri()[7:])
+        filename = unquote(file.get_uri()[7:])
         terminal = self.gsettings[TERMINAL_KEY]
 
         os.chdir(filename)