Calculate random accuracy.

    :param TOP: test outcome positive
    :type TOP : int
    :param P:  condition positive
    :type P : int
    :param POP: population
    :type POP:int
    :return: RACC as float

def RACC_calc(TOP, P, POP):
    """
    Calculate random accuracy.

    :param TOP: test outcome positive
    :type TOP : int
    :param P:  condition positive
    :type P : int
    :param POP: population
    :type POP:int
    :return: RACC as float
    """
    try:
        result = (TOP * P) / ((POP) ** 2)
        return result
    except Exception:
        return "None"