python - Error when trying to use `assert not mock.method.called` -

i'm trying assert method not called using python mock. unfortunately, can't seem past error:

attributeerror: mockcallable instance has no attribute 'called' 

i'm running python 2.7.1 , python mock 0.1.0 tests. google says: no results found "attributeerror: mockcallable instance has no attribute 'called'". how can resolve error?

here's test:

import unittest2 import main mock import mock  class testcli(unittest2.testcase):     def setup(self):         self.mockview = mock()         self.mockfriendmanager = mock()         self.mockedcli = main.cli(self.mockview, self.mockfriendmanager)  [...]      def testclidoesntgetfriendpropertieswhennotselected(self):         view = mock( { "requestresponse":2 } )         friendmanager = mock()         cli = main.cli(view, friendmanager)         cli.outputmenu()         assert not friendmanager.getfriendproperties.called, 'hello' 

you must update mock library pip. attribute called introduced in 0.4.0 can see in http://www.voidspace.org.uk/python/mock/changelog.html#version-0-4-0

anyway update lot of more useful facilities , tools.