Level 4Exercise #85

Round-robin labels

Assign repeating labels to n items.

What you’ll practice

This Level 4 exercise focuses on cycle 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.cycle.

Sample Test Cases

Example #1

Input:assign_labels(items=['a','b','c'], labels=['red','blue'])

Output:[('a','red'),('b','blue'),('c','red')]

Reference Solution

Reveal Reference Solution

def assign_labels(items: list[str], labels: list[str]) -> list[tuple[str,str]]:
    from itertools import cycle
    label_stream = cycle(labels)
    return [(item, next(label_stream)) for item in items]

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Round-robin labels

What you’ll practice

Sample Test Cases

Further Reading

Reference Solution