有2个清单:
list_a = [['apple', 'banana', 'strawberry'], ['meat'], ['milk'], ['meat']]
list_b = [['chicken'], ['pork'], ['beef']]
如何将list_b放到list_a而不是’meat’,如下所示:
list_c = [['apple', 'banana', 'strawberry'], ['chicken'], ['pork'],
['beef'], ['milk'], ['chicken'], ['pork'], ['beef']]
最佳答案 使用for循环和.extend()列表方法:
for food in list_a:
if food == ['meat']:
list_c.extend(list_b)
else:
list_c.append(food)
print (list_c)
并且list_c将打印出来:
[['apple', 'banana', 'strawberry'], ['chicken'], ['pork'], ['beef'], ['milk'], ['chicken'], ['pork'], ['beef']]
这样,您可以将list_a中的[‘meat’]的每个实例替换为list_b中的所有元素.这将产生您正在寻找的输出.