edit

demeter/core.py

@@ -281,7 +281,7 @@ class Demeter(object):
 	@classmethod
 	def uuid(self, value):
 		import uuid
-		return uuid.uuid5(uuid.uuid1(), value)
+		return str(uuid.uuid5(uuid.uuid1(), value))
 
 	@staticmethod
 	def hour(value):

demeter/model.py

@@ -275,7 +275,6 @@ class Model(object):
 			system = self._attr[field].uuid
 		name = system + '.' + self.__table__
 		result = Demeter.uuid(name)
-		result = str(result)
 		setattr(self, field, result)
 
 	def createMd5(self, value):