; East Asian; South Asian; White or of European descent', 'Hispanic or Latino/Latina; White or of European descent', 'White or of European descent; I prefernot to say', 'Sou
如果我有一个这样的数据帧: A 1 NaN 3 Descent 5 Ascent 如何填充单词之间的值,使'Ascent‘和'Descent’之间的NaN值填充为'Above‘,而'Descent’和'Ascent‘之间的NaN值填充为'Below’。这样我就可以得到这样的Pandas数据帧: A 1 'Above