1.实现两个长度相同的列表对应元素相减
l1 =[1, 2], l2 =[3, 4] l = list(map(lambda x: x[0]-x[1], zip(l1, l2)))
l1 =[1, 2], l2 =[3, 4]
l = list(map(lambda x: x[0]-x[1], zip(l1, l2)))