Untitled

def sum_by_types(a: list) -> (str, int):
    accum = {T: T() for T in (str, int)}
    print(accum)
    for i in a:
        accum[type(i)] += i
    return accum.values()

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print(list(sum_by_types(["1", 'ss', 2, 3])))
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