python的一个问题

Question

请问如何用一行代码代替，谢谢！

for i in [[0, '2'], [4, '9'], [50, '63'], [445, '63']]:
    if i[0] == 50:
        a = i[1]
        b = i[4]
        break

Answer 1

可以使用列表推导式来代替循环：

a, b = next((i[1], i[4]) for i in [[0, '2'], [4, '9'], [50, '63'], [445, '63']] if i[0] == 50)