Tuple expansion is very much a power-user's tool. We actually use it a lot in the autograding software because it helps simplify test cases. Instead of writing the test case for each input on a separate line, we create a list of inputs and call them in a for-loop. For example, we could test avg as follows: tests = [(0,),(-1, 1, 3, 5, 2), (1, 1, 1, 1)] for case in tests: result = func.avg(*case[:-1]) introcs.assert_floats_equal(case[-1],result) Can you think of any other applications of tuple expansion