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Step 8

curriculum/challenges/english/blocks/workshop-breadth-first-search/68e00f88cf82083df8e0497b.md

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--description--

Before you keep working on the BFS logic, call gen_parentheses(1) and print the result to the console.

--hints--

You should print gen_parentheses(1) to the console.

js
({ test: () => runPython(`
assert _Node(_code).has_call('print(gen_parentheses(1))')
`) })

--seed--

--seed-contents--

py
def gen_parentheses(pairs):
    if not isinstance(pairs, int):
        return 'The number of pairs should be an integer'
    if pairs < 1:
        return 'The number of pairs should be at least 1'
    
    queue = [('', 0, 0)]
    result = []

    while queue:
        print(queue)
        current, opens_used, closes_used = queue.pop(0)

    return result
--fcc-editable-region--

--fcc-editable-region--