我定义:
A = [[1, 2], [3, 4], [5, 6]]
生产线生产什么:
B = [['hello', [1, 2]], ['hello', [3, 4]], ['hello', [5, 6]]]
请您参考如下方法:
您可以使用列表理解将 'hello' 添加到每个列表的前面:
>>> add = 'hello'
>>> A = [[1, 2], [3, 4], [5, 6]]
>>> [[add, x] for x in A]
[['hello', [1, 2]], ['hello', [3, 4]], ['hello', [5, 6]]]
# or [[add] + [x] for x in A]
