def _extra_fields(record, restkey):
    """
    Accepts a record from a csv.DictReader object and determines if any extra
    fields are present in the column named after the 'restkey' passed to the
    csv.DictReader constructor.

    Returns the list of extra fields or False if no extra fields are present.
    """
    extra_fields = False
    for key in record:
        if key == restkey:
            extra_fields = record[key]
    return extra_fields
