def skewness(data):
    """Return the skewness of the data's distribution

    """

    if not data:
        raise StatisticsError('skewness requires at least one data point')

    size = len(data)
    sd = stdev(data) ** 3

    if not sd:
        return 0.0

    mn = mean(data)
    return sum(map(lambda x: (sd / (x - mn) ** 3), data)) / size
dataset/ETHPy150Open avalente/appmetrics/appmetrics/statistics.py/skewness/swapped operands of `/`