Sometimes, while working with python, we can have a problem of splitting a list. This problem is quite common and has many variations. Having solutions to popular variations proves to be good in long run. Let’s discuss certain way to split list in uneven groups as defined by other list.
Method : Using itertools.islice() + list comprehension
The combination of above functionalities can be used to perform this task. In this, islice() is used to perform the core task of slicing the list and list comprehension is used to perform the task of binding together logic and iterations. The container is converted to iterator for faster iteration.
# Python3 code to demonstrate working of # Split list in uneven groups # using itertools.islice() + list comprehension from itertools import islice # initialize list test_list = [1, 4, 5, 7, 6, 5, 4, 2, 10] # initialize split list split_list = [3, 4, 2] # printing original list print("The original list is : " + str(test_list)) # printing split list print("The split list is : " + str(split_list)) # Split list in uneven groups # using itertools.islice() + list comprehension temp = iter(test_list) res = [list(islice(temp, 0, ele)) for ele in split_list] # printing result print("The resultant split list is : " + str(res)) |
The original list is : [1, 4, 5, 7, 6, 5, 4, 2, 10] The split list is : [3, 4, 2] The resultant split list is : [[1, 4, 5], [7, 6, 5, 4], [2, 10]]
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