Level 4Exercise #92

Paginate a stream

Read one page from an iterator given zero-based page number and page size.

What you’ll practice

This Level 4 exercise focuses on islice in the Itertools curriculum. Solve the challenge prompt above using clear, idiomatic Python and the relevant language or standard-library tools.

Relevant Python reference: itertools.islice.

Sample Test Cases

Example #1

Input:page(range(20), page_num=2, page_size=4)

Output:[8,9,10,11]

Reference Solution

Reveal Reference Solution

def page(items, page_num: int, page_size: int):
    from itertools import islice
    start = (page_num - 1) * page_size
    return list(islice(items, start, start + page_size))

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Paginate a stream

What you’ll practice

Sample Test Cases

Further Reading

Reference Solution