def SendCommand(self, command, arg=None):
    if arg is not None:
      command = '%s:%s' % (command, arg)
    self._Write(cStringIO.StringIO(command), len(command))
Sends a command to the device.
dataset/ETHPy150Open google/openhtf/openhtf/plugs/usb/fastboot_protocol.py/FastbootProtocol.SendCommand