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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def extend_validators(raw_validators, override_validators):
 """ extend raw_validators with override_validators. override_validators will merge and override raw_validators. Args: raw_validators (dict):
 override_validators (dict):
 Returns: list: extended validators Examples: [ {"check": "v1", "expect": 201, "comparator": "eq"}, {"check": "s2", "expect": 16, "comparator": "len_eq"}, {"check": "s3", "expect": 12, "comparator": "len_eq"} ] """


    if not raw_validators:
        return override_validators

    elif not override_validators:
        return raw_validators

    else:
        def_validators_mapping = _convert_validators_to_mapping(raw_validators)
        ref_validators_mapping = _convert_validators_to_mapping(override_validators)

        def_validators_mapping.update(ref_validators_mapping)
        return list(def_validators_mapping.values())