Add __lt__ and __gt__ methods to LazyUUIDTaskSet

Author: RonMcKay

tasklib/lazy.py

@@ -165,12 +165,24 @@ def __le__(self, other):
     def __ge__(self, other):
         return self.issuperset(other)
 
+    def __lt__(self, other):
+        return self.isstrictsubset(other)
+
+    def __gt__(self, other):
+        return self.isstrictsuperset(other)
+
     def issubset(self, other):
         return all([task in other for task in self])
 
     def issuperset(self, other):
         return all([task in self for task in other])
 
+    def isstrictsubset(self, other):
+        return len(set(t['uuid'] for t in other) - self._uuids) > 0
+
+    def isstrictsuperset(self, other):
+        return len(self._uuids - set(t['uuid'] for t in other)) > 0
+
     def union(self, other):
         return LazyUUIDTaskSet(
             self._tw,