>>> import mock
>>> m = mock.MagicMock(return_value=[1,2,3])
>>> m()
[1, 2, 3]
>>> m()
[1, 2, 3]
>>> m()
[1, 2, 3]
>>> m()
[1, 2, 3]
>>> m()
[1, 2, 3]
>>> m()
[1, 2, 3]