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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 _read_data(self, count):
 """Read a specified count of bytes from the PN532."""

        # Build a read request frame.
        frame = bytearray(count)
        frame[0] = PN532_SPI_DATAREAD
        # Send the frame and return the response, ignoring the SPI header byte.
        self._gpio.set_low(self._cs)
        self._busy_wait_ms(2)
        response = self._spi.transfer(frame)
        self._gpio.set_high(self._cs)
        return response