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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(self, length, timeout_ms=0, blocking=False):
 """ Read an Input report from a HID device with timeout. Input reports are returned to the host through the `INTERRUPT IN` endpoint. The first byte will contain the Report number if the device uses numbered reports. By default reads are non-blocking, i.e. the method will return `None` if no data was available. Blocking reads can be enabled with :param blocking:. Additionally, a timeout for the read can be specified. :param length: The number of bytes to read. For devices with multiple reports, make sure to read an extra byte for the report number. :param timeout_ms: Timeout in miliseconds :type timeout_ms: int :param blocking: Block until data is available """

        self._check_device_status()
        bufp = ffi.new("unsigned char[]", length)
        if not timeout_ms and blocking:
            timeout_ms = -1
        if timeout_ms:
            rv = hidapi.hid_read_timeout(self._device, bufp, length,
                                         timeout_ms)
        else:
            rv = hidapi.hid_read(self._device, bufp, length)
        if rv == -1:
            raise IOError("Failed to read from HID device: {0}"
                          .format(self._get_last_error_string()))
        elif rv == 0:
            return None
        else:
            return ffi.buffer(bufp, rv)[:]