问题描述
我有两个 Python 数字列表.
list1 = [123,452,342,533,222,402,124,125,263,254,44,987,78,655,741,165,597,26,15,799,100,156,322]list2 = [2,5,14,3] ##这些数字指定了所需的块大小
我想通过根据 list2 中的大小数字拆分 list1 来创建 list1 的子集或子列表.结果,我想要这个:
a_list = [123,452] ##对应list2中的第一个元素(2);从 list1 中获取前两个数字b_list = [342,533,222,402,124] ##对应list2中的第二个元素(5);从 list1 中获取接下来的 5 个数字c_list = [125,263,254,44,987,78,655,741,165,597,26,15,799,100] ##next 14 个数字来自 list1d_list = [154,122,563] ##list1 中的下 3 个数字
本质上,每个块都应该遵循 list2.这意味着,第一个块应该有 list1 中的前 2 个元素,第二个块应该有接下来的 5 个元素,依此类推.
我该怎么做?
在数据上创建一个迭代器,然后针对您需要的每个范围调用next
:
I have two Python lists of numbers.
list1 = [123,452,342,533,222,402,124,125,263,254,44,987,78,655,741,165,597,26,15,799,100,154,122,563]
list2 = [2,5,14,3] ##these numbers specify desired chunk sizes
I would like to create subsets or sub-lists of list1 by splitting list1 according to the size numbers in list2. As a result, I would like to have this:
a_list = [123,452] ##correspond to first element (2) in list2; get the first two numbers from list1
b_list = [342,533,222,402,124] ##correspond to second element (5) in list2; get the next 5 numbers from list1
c_list = [125,263,254,44,987,78,655,741,165,597,26,15,799,100] ##next 14 numbers from list1
d_list = [154,122,563] ##next 3 numbers from list1
Essentially, each chunk should follow list2. This means, the first chunk should have the first 2 elements from list1,the second chunk should have the next 5 elements, and so on.
How can I do this?
Create an iterator over the data, and then call next
on it for each range you need:
>>> data = [123,452,342,533,222,402,124,125,263,254,44,987,78,655,741,165,597,26,15,799,100,154,122,563]
>>> sizes = [2, 5, 14, 3]
>>> it = iter(data)
>>> [[next(it) for _ in range(size)] for size in sizes]
[[123, 452],
[342, 533, 222, 402, 124],
[125, 263, 254, 44, 987, 78, 655, 741, 165, 597, 26, 15, 799, 100],
[154, 122, 563]]
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