def skewness(data):

    if len(data) == 0:
        return None

    num = moment(data, 3)
    denom = moment(data, 2) ** 1.5

    return num / denom if denom != 0 else 0.
Returns the skewness of ``data``.
dataset/ETHPy150Open yvesalexandre/bandicoot/bandicoot/helper/tools.py/skewness