def allowed(self, op, body):
"""Raise exception if op is not a valid operation on entity."""
op = op.upper()
if not op in self.operations:
raise NotImplementedStatus(
"Operation '%s' not implemented for '%s' %s" %
(op, self.name, self.operations))
def not_implemented(operation, entity_type):
"""Raise NOT_IMPLEMENTED exception"""
raise NotImplementedStatus("Operation '%s' not implemented on %s" % (operation, entity_type))