@classmethod
    def _get_val(cls, item, path):
        """
        Return the answer in the given submitted form (item) to the question specified by path.
        Return empty tuple if no answer was given to the given question.
        """
        if path:
            try:
                v = item['form']
                for key in path:
                    v = v[key]
                return v
            except __HOLE__:
                return ()
dataset/ETHPy150Open dimagi/commcare-hq/custom/abt/reports/expressions.py/AbtSupervisorExpressionSpec._get_val