def foo(eps):
    err = expected_error(q, eps, pf_pmf)
    eps2 = expected_epsilon(q, err, [eps, (2 * eps)])
    return ((- eps2) / eps)
def foo(eps):
    err = expected_error(q, eps, pf_pmf)
    eps2 = expected_epsilon(q, err, [eps, (2 * eps)])
    return ((- eps2) / eps)