features.py 文件源码

def _calculate(self, X, y, categorical, metafeatures, helpers):
        values = [val for val in helpers.get_value("NumSymbols") if val > 0]
        if len(values) == 0:
            return 0
        # FIXME Error handle
        std = np.nanstd(values)
        return std if np.isfinite(std) else 0