def get_winning_days( rets):
    negative_rets = []
    for i in rets:
        if(i<0):
            negative_rets.append(i)
    return 100 * (1 - float(len(negative_rets)) / float(len(rets)))
@summary Returns the percentage of winning days of the returns.
dataset/ETHPy150Open QuantSoftware/QuantSoftwareToolkit/QSTK/qstkutil/tsutil.py/get_winning_days