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Python: Chunk a given list into n smaller lists

Python List: Exercise - 233 with Solution

Write a Python program to chunk a given list into n smaller lists.

  • Use math.ceil() and len() to get the size of each chunk.
  • Use list() and range() to create a new list of size n.
  • Use map() to map each element of the new list to a chunk the length of size.
  • If the original list can't be split evenly, the final chunk will contain the remaining elements.

Sample Solution:

Python Code:

from math import ceil

def chunk_list_into_n(nums, n):
  size = ceil(len(nums) / n)
  return list(
    map(lambda x: nums[x * size:x * size + size],
    list(range(n)))
  )
print(chunk_list_into_n([1, 2, 3, 4, 5, 6, 7], 4))  

Sample Output:

[[1, 2], [3, 4], [5, 6], [7]]

Flowchart:

Flowchart: Chunk a given list into n smaller lists.

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Python: Tips of the Day

Floor Division:

When we speak of division we normally mean (/) float division operator, this will give a precise result in float format with decimals.

For a rounded integer result there is (//) floor division operator in Python. Floor division will only give integer results that are round numbers.

print(1000 // 300)
print(1000 / 300)

Output:

3
3.3333333333333335