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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 InternalInit(self):
 """Initializes the device and obtains channel id."""

    self.cid = UsbHidTransport.U2FHID_BROADCAST_CID
    nonce = bytearray(os.urandom(8))
    r = self.InternalExchange(UsbHidTransport.U2FHID_INIT, nonce)
    if len(r) < 17:
      raise errors.HidError('unexpected init reply len')
    if r[0:8] != nonce:
      raise errors.HidError('nonce mismatch')
    self.cid = bytearray(r[8:12])

    self.u2fhid_version = r[12]