split text file with lines into mutiple lines by nth numbers-CodePudding

I am trying make script that split text file with lines into multiple lines group in python3 here is an example:

text file contains:
1
2
3
4
5
6
7
8
9
10

output that I want:
first chunk
1
2
3

second chunk
4
5
6

third chunk
7
8
9

fourth chunk
10

how can I do that? and thank you in advance

CodePudding user response：

def divide_chunks(l, n):
    for i in range(0, len(l), n): 
        yield l[i:i   n]

with open(path_to_txt_file) as f:
    arr = f.read().splitlines()

divide_chunks(arr, 3)

which gives (as generator):

[['1', '2', '3'], ['4', '5', '6'], ['7', '8', '9'], ['10']]