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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 _validate_example(rh, method, example_type):
 """Validates example against schema :returns: Formatted example if example exists and validates, otherwise None :raises ValidationError: If example does not validate against the schema """

    example = getattr(method, example_type + "_example")
    schema = getattr(method, example_type + "_schema")

    if example is None:
        return None

    try:
        validate(example, schema)
    except ValidationError as e:
        raise ValidationError(
            "{}_example for {}.{} could not be validated.\n{}".format(
                example_type, rh.__name__, method.__name__, str(e)
            )
        )

    return json.dumps(example, indent=4, sort_keys=True)