Reference library

Lists & loops

Iterate, transform, and combine sequences with readable loop patterns.

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Lists & loops easy

Truncate List Keeping Last N Elements in Python

Return a new list containing only the last N elements from a sequence, handling edge cases like zero or oversized counts.

list slicing sequence
Python 
def truncate(seq, keep_last_n):
    """Return a new list keeping only the last n elements."""
    if keep_last_n <= 0:
        return []
    return list(seq)[-keep_last_n:]


if __name__ == "__main__":
    data = [10, 20, 30, 40, 50, 60]
    print(truncate(data, 3))
    print(truncate(data, 0))
    print(truncate(data…
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