def process_query_mlt(self, key, val, action):
        return {
            'more_like_this': val,
        }
Asserts that val is non-empty string and all characters are digits.
dataset/ETHPy150Open mozilla/kitsune/kitsune/search/es_utils.py/Sphilastic.process_query_mlt--crossover with--dataset/ETHPy150Open ActivisionGameScience/assertpy/assertpy/assertpy.py/AssertionBuilder.is_digit