Function counter_func

dask/tests/test_task_spec.py:812–814

(a, b)

    counter = []

    def counter_func(a, b):
        counter.append(None)
        return func(a, b)

    a = Task("key-1", counter_func, "a", "a")
    b = Task("key-2", func2, a.ref(), "b")