Quantitative platform in test.py 文件源码

def bband(stock, window, num_std):
        data = stock.selected_line_info.values
        index = stock.selected_line_info.index
        ma = pd.rolling_mean(data, window)
        std = pd.rolling_std(data, window)
        upper = ma + std * num_std
        lower = ma - std * num_std
        bband_ma = pd.Series(ma, index=index)
        bband_upper = pd.Series(upper, index=index)
        bband_lower = pd.Series(lower, index=index)
        return bband_upper,bband_lower,bband_ma