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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 _is_duplicate_record(self, rtype, name, content):
 """Check if DNS entry already exists."""

        records = self._list_records(rtype, name, content)
        is_duplicate = len(records) >= 1
        if is_duplicate:
            LOGGER.info('Duplicate record %s %s %s, NOOP', rtype, name, content)
        return is_duplicate