X-Git-Url: https://git.madduck.net/etc/taskwarrior.git/blobdiff_plain/4f1686540934a69cd3b65e54f8921b97b1102b09..f653e7f77ba70761ffcb285268a8a89b4a76eb0b:/tasklib/lazy.py

diff --git a/tasklib/lazy.py b/tasklib/lazy.py
index d294341..aa2c065 100644
--- a/tasklib/lazy.py
+++ b/tasklib/lazy.py
@@ -32,7 +32,7 @@ class LazyUUIDTask(object):
         return getattr(self, name)
 
     def __eq__(self, other):
-        if other['uuid']:
+        if other and other['uuid']:
             # For saved Tasks, just define equality by equality of uuids
             return self['uuid'] == other['uuid']
 
@@ -49,6 +49,14 @@ class LazyUUIDTask(object):
         """
         return True
 
+    @property
+    def _modified_fields(self):
+        return set()
+
+    @property
+    def modified(self):
+        return False
+
     def replace(self):
         """
         Performs conversion to the regular Task object, referenced by the
@@ -132,6 +140,15 @@ class LazyUUIDTaskSet(object):
     def __rxor__(self, other):
         return self.symmetric_difference(other)
 
+    def __and__(self, other):
+        return self.intersection(other)
+
+    def __iand__(self, other):
+        return self.intersection_update(other)
+
+    def __rand__(self, other):
+        return self.intersection(other)
+
     def __le__(self, other):
         return self.issubset(other)