--description--

Before implementing the core algorithm, you need to validate the input. The pairs parameter should be an integer, as it represents the number of parentheses pairs to generate.

Add an if statement at the beginning of your function to check if pairs is not an integer. Use the isinstance() function for that.

If the condition is true, return the string The number of pairs should be an integer.

--hints--

You should have an if statement in your gen_parentheses function.

({ test: () => runPython(`
assert _Node(_code).find_function("gen_parentheses").find_ifs()[0]
`) })

Your if statement should check if pairs is not an integer using not isinstance(pairs, int).

({ test: () => runPython(`
assert _Node(_code).find_function("gen_parentheses").find_ifs()[0].find_conditions()[0].is_equivalent("not isinstance(pairs, int)")
`) })

You should return the string The number of pairs should be an integer when the input is not an integer.

({ test: () => runPython(`
msg = 'The number of pairs should be an integer'
args = [1.1, "1", [1, 2], {}]
assert  all(gen_parentheses(arg) == msg for arg in args)
`) })

--seed--

--seed-contents--

--fcc-editable-region--
def gen_parentheses(pairs):
    
    return []
--fcc-editable-region--