Equally-Sized Chunks from Arbitrary-Length Lists
Dividing a list into equally-sized segments can be a valuable operation for data processing. This article presents a concise guide to achieving this task in Python.
Using a Custom Generator
A versatile approach is to utilize a generator that yields evenly-sized chunks:
def chunks(lst, n): """Yield successive n-sized chunks from lst.""" for i in range(0, len(lst), n): yield lst[i:i + n]
To demonstrate its usage:
pprint.pprint(list(chunks(range(10, 75), 10)))
Output:
[[10, 11, 12, 13, 14, 15, 16, 17, 18, 19], [20, 21, 22, 23, 24, 25, 26, 27, 28, 29], [30, 31, 32, 33, 34, 35, 36, 37, 38, 39], [40, 41, 42, 43, 44, 45, 46, 47, 48, 49], [50, 51, 52, 53, 54, 55, 56, 57, 58, 59], [60, 61, 62, 63, 64, 65, 66, 67, 68, 69], [70, 71, 72, 73, 74]]
List Comprehension Variant
As an alternative, a single-line solution using list comprehension can be employed:
[lst[i:i + n] for i in range(0, len(lst), n)]
However, utilizing named functions is recommended for improved code readability.
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