Counter for warehouse zone visits

Python data engineering interview problem. Difficulty: beginner. Pattern: Dictionaries. About 10 minutes. Part of the Pro drill bank.

Forklifts scan a warehouse zone each time they enter it. A heatmap needs how many visits each zone received.

Count visits per warehouse zone.

Requirements

• Each occurrence increments that zone.
• Order of keys should be deterministic if tests compare dicts as strings.

Constraints

• zones: a list of zone ids in visit order.

Examples

Input: zone_visit_counts(['A', 'B', 'A', 'C', 'B', 'A']) Output: [('A', 3), ('B', 2), ('C', 1)] This input follows the stated rules and produces this output.

Topics: lakebench, python, dictionaries.

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