Method callback

Lib/test/test_timeit.py:380–381

(a, b)

    def test_autorange_with_callback(self):
        def callback(a, b):
            print("{} {:.3f}".format(a, b))
        with captured_stdout() as s:
            num_loops, time_taken = self.autorange(callback=callback)
        self.assertEqual(num_loops, 500)