@staticmethod
def test_repr() -> None:
    d = (Binomial() + Binomial())
    assert (str(d) == 'Binomial(pmf={}, n=0, p=1)')
@staticmethod
def test_repr() -> None:
    d = (Binomial() + Binomial())
    assert (str(d) == 'Binomial(pmf={}, n=0, p=1)')