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snippets/python/s/chunk-into-n.md

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+---
+title: Split list into n chunks
+type: snippet
+language: python
+tags: [list]
+cover: succulent-10
+dateModified: 2020-10-23T05:35:06+03:00
+---
+
+Chunks a 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.
+
+```py
+from math import ceil
+
+def chunk_into_n(lst, n):
+  size = ceil(len(lst) / n)
+  return list(
+    map(lambda x: lst[x * size:x * size + size],
+    list(range(n)))
+  )
+```
+
+```py
+chunk_into_n([1, 2, 3, 4, 5, 6, 7], 4) # [[1, 2], [3, 4], [5, 6], [7]]
+```