我正在嘗試將此邏輯放在 pandas 數(shù)據(jù)框上IF base_total_price > 0    IF base_total_discount = 0        actual_price = base_total_price        IF base_total_discount > 0            actual_price = base_total_price +base_total_discountIF base_total_price = 0     IF base_total_discount > 0          actual_price = base_total_discount     IF base_total_discount = 0          actual_price = 0所以我寫(xiě)了這兩個(gè)應(yīng)用函數(shù)#for all entries where base_total_price > 0df_slice_1['actual_price'] = df_slice_1['base_total_discount'].apply(lambda x: df_slice_1['base_total_price'] if x == 0 else df_slice_1['base_total_price']+df_slice_1['base_total_discount'])#for all entries where base_total_price = 0df_slice_1['actual_price'] = df_slice_1['base_total_discount'].apply(lambda x: x if x == 0 else df_slice_1['base_total_discount'])當(dāng)我運(yùn)行代碼時(shí)出現(xiàn)此錯(cuò)誤ValueError: Wrong number of items passed 20, placement implies 1我知道它試圖在一列中放置更多值，但我不明白為什么會(huì)這樣或者我該如何解決這個(gè)問(wèn)題。我需要做的就是使用新列“actual_price”更新數(shù)據(jù)框，我需要根據(jù)上述邏輯計(jì)算該列的值。請(qǐng)建議我更好的實(shí)現(xiàn)邏輯的方法或糾正我