def fillbackward(nds):
    for col in range(nds.shape[1]):
        for row in range(nds.shape[0] - 2, -1, -1):
            if math.isnan(nds[row, col]):
                nds[row, col] = nds[row+1, col]
Return the value of the answer for this question
dataset/ETHPy150Open QuantSoftware/QuantSoftwareToolkit/QSTK/qstkutil/tsutil.py/fillbackward--crossover with--dataset/ETHPy150Open sahana/eden/modules/s3db/survey.py/S3QuestionTypeAbstractWidget.getAnswer