我试图附加到2D列表中的特定索引

Question

a=1+2 
import csv
    all_items=[]
    with open('stockes.csv') as product:
        stockes=csv.reader(product)
        for row in stockes:
            all_items.append(row)
    print(all_items[1][2])
    all_items([1],[2]).append(a)

抱歉，但是a代替了我的正常变量，这也是我的第一个问题

Answer 1

列表是 [[＆＃39;条形码＆＃39;，＆＃39;名称＆＃39;，＆＃39;股票＆＃39;，＆＃39;奖品＆＃39;]，[＆＃39; 13245627＆＃39;， ＆＃39;普通括号＆＃39;，＆＃39; 3＆＃39;，＆＃39; 599＆＃39;]，[＆＃39; 12345670＆＃39;，＆＃39; 100 mm螺栓＆＃39;， ＆＃39; 7＆＃39;，＆＃39; 550＆＃39;]，[＆＃39; 56756777＆＃39;，＆＃39; L形括号＆＃39;，＆＃39; 8＆＃39;， ＆＃39; 230＆＃39;]]

a=1+2 
import csv
    all_items=[]
    with open('stockes.csv') as product:
        stockes=csv.reader(product)
        for row in stockes:
            all_items.append(row)
    print(all_items[1][2])
    all_items([1][2]).append(a)

抱歉，我希望这更好