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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 db_get(self, db_number):
 """Uploads a DB from AG. """

        logger.debug("db_get db_number: %s" % db_number)
        _buffer = buffer_type()
        result = self.library.Cli_DBGet(
            self.pointer, db_number, byref(_buffer),
            byref(c_int(buffer_size)))
        check_error(result, context="client")
        return bytearray(_buffer)