How to Split a Python List into Fixed‑Size Chunks Efficiently

1. Introduction

The author received a question about formatting a Python list more neatly and shares the solution with the community.

The original list is shown in the following image.

The desired output is a more regularly formatted version, illustrated below.

2. Implementation

One contributor suggested splitting the list into n smaller lists.

def split_list(lst, chunk_size):
    """
    lst: list to split
    Split the list into sub‑lists of size chunk_size
    """
    return [lst[i:i + chunk_size] for i in range(0, len(lst), chunk_size)]

This function successfully reshapes the list as required.

Another contributor recommended using NumPy's reshape for an even simpler solution.

3. Conclusion

The article summarizes the Python list‑splitting problem, provides two concrete implementations (a pure‑Python function and a NumPy reshape approach), and encourages readers to share concise code snippets and error screenshots when seeking help.