def test_columns_padding(self):
     assert_equal(
         columns(self.odd_list, 2),
         [[0,1,2,3,4], [5,6,7,8,None]]
     )
     assert_equal(
         columns(self.even_list, 3, filler='foo'),
         [[0,1,2,3], [4,5,6,7], [8,9,'foo','foo']]
     )
 def test_columns_no_padding(self):
     assert_equal(
         columns(self.odd_list, 2, pad_columns=False),
         [[0,1,2,3,4], [5,6,7,8]]
     )
     assert_equal(
         columns(self.even_list, 2, pad_columns=False),
         [[0,1,2,3,4], [5,6,7,8,9]]
     )