如何在Python中创建多维列表? [英] How can i create multidimensional list in Python?

问题描述

如何根据某些条件遍历一维列表时创建多维列表.

How can i create a multidimensional list while iterating through a 1d list based upon some condition.

我正在遍历一维列表，每当找到一个'\ n'时，都应该在创建的列表后附加一个新列表，例如，

I am iterating over a 1d list and whenever i find a '\n' i should append the so created list with a new list, for example,

 a = [1,2,3,4,5,'\n',6,7,8,9,0,'\n',3,45,6,7,2]

所以我希望它像这样

new_list = [[1,2,3,4],[6,7,8,9,0],[3,45,6,7,2]]

我应该怎么做?请帮助

def storeData(k):
    global dataList
    dlist = []
    for y in k:
        if y != '\n':
            dlist.append(y)
        else:
            break
    return dlist

这是我尝试过的.

推荐答案

使用 itertools.groupby 即可完成工作(按 not 作为换行进行分组):

Using itertools.groupby would do the job (grouping by not being a linefeed):

import itertools

a = [1,2,3,4,5,'\n',6,7,8,9,0,'\n',3,45,6,7,2]

new_list = [list(x) for k,x in itertools.groupby(a,key=lambda x : x!='\n') if k]

print(new_list)

我们比较关键真值以过滤出 \ n

We compare the key truth value to filter out the occurrences of \n

结果:

[[1, 2, 3, 4, 5], [6, 7, 8, 9, 0], [3, 45, 6, 7, 2]]

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