human
Solve the following python programming problem given the following code:
@ pytest.mark.skipif ('not bokeh') 
def test_pprint_task() : 
    from dask.diagnostics.profile_visualize import pprint_task 
    keys = set (['a', 'b', 'c', 'd', 'e']) 
    assert (pprint_task ((add, 'a', 1), keys) == 'add(_, *)') 
    assert (pprint_task ((add, (add, 'a', 1)), keys) == 'add(add(_, *))') 
    res = 'sum([*, _, add(_, *)])' 
    assert (pprint_task ((sum, [1, 'b', (add, 'a', 1)]), keys) == res) 
    assert (pprint_task ((sum, (1, 2, 3, 4, 5, 6, 7)), keys) == 'sum(*)') 
    assert (len (pprint_task ((sum, (list (keys) * 100)), keys)) < 100) 
    assert (pprint_task ((sum, (list (keys) * 100)), keys) == 'sum([_, _, _, ...])') 
    assert (pprint_task ((sum, ([1, 2, (sum, ['a', 4]), 5, 6] * 100)), foo) == 'sum([*, *, sum([_, *]), ...])') 
    assert (pprint_task ((sum, [1, 2, (sum, ['a', (sum, [1, 2, 3])]), 5, 6]), keys) == 'sum([*, *, sum([_, sum(...)]), ...])') 
    def foo(w, x, y = (), z = 3) : 
        return (((w + x) + sum (y)) + z) 
task = (apply, foo, (tuple, ['a', 'b']), (dict, [['y', ['a', 'b']], ['z', 'c']])) 
    assert (pprint_task (task, keys) == 'foo(_, _, y=[_, _], z=_)') 
    task = (apply, foo, (tuple, ['a', 'b']), (dict, [['y', ['a', 1]], ['z', 1]])) 
    assert (pprint_task (task, keys) == 'foo(_, _, y=[_, *], z=*)') 

    
    

    Fix the buggy line: assert (pprint_task ((sum, ([1, 2, (sum, ['a', 4]), 5, 6] * 100)), foo) == 'sum([*, *, sum([_, *]), ...])')
assistant
#Here is Python code to fix the buggy line: assert (pprint_task ((sum, ([1, 2, (sum, ['a', 4]), 5, 6] * 100)), foo) == 'sum([*, *, sum([_, *]), .

assert (pprint_task ((sum, ([1, 2, (sum, ['a', 4]), 5, 6] * 100)), keys) == 'sum([*, *, sum([_, *]), ...])')