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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 CmdVersion(self):
 """Obtain the version of the device and test transport format. Obtains the version of the device and determines whether to use ISO 7816-4 or the U2f variant. This function should be called at least once before CmdAuthenticate or CmdRegister to make sure the object is using the proper transport for the device. Returns: The version of the U2F protocol in use. """

    self.logger.debug('CmdVersion')
    response = self.InternalSendApdu(apdu.CommandApdu(
        0, apdu.CMD_VERSION, 0x00, 0x00))

    if not response.IsSuccess():
      raise errors.ApduError(response.sw1, response.sw2)

    return response.body