def _delete_file(k): raise DeletionsNotAllowed( "Delete permissions were disabled for this data accessor")
def clear(self): raise DeletionsNotAllowed( "You can't delete (so definitely not delete all) with that Store")
def pop(self, k): raise DeletionsNotAllowed( "You can't delete (including popping) with that Store")
def __delitem__(self, k): raise DeletionsNotAllowed("You can't delete with that Store")