rimesso guessit con le modifiche per gli import

lib/guessit/backports.py

@@ -0,0 +1,27 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+"""
+Backports
+"""
+# pragma: no-cover
+# pylint: skip-file
+
+def cmp_to_key(mycmp):
+    """functools.cmp_to_key backport"""
+    class KeyClass(object):
+        """Key class"""
+        def __init__(self, obj, *args):  # pylint: disable=unused-argument
+            self.obj = obj
+        def __lt__(self, other):
+            return mycmp(self.obj, other.obj) < 0
+        def __gt__(self, other):
+            return mycmp(self.obj, other.obj) > 0
+        def __eq__(self, other):
+            return mycmp(self.obj, other.obj) == 0
+        def __le__(self, other):
+            return mycmp(self.obj, other.obj) <= 0
+        def __ge__(self, other):
+            return mycmp(self.obj, other.obj) >= 0
+        def __ne__(self, other):
+            return mycmp(self.obj, other.obj) != 0
+    return KeyClass