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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 langids(self):
 """ Return the USB device's supported language ID codes. These are 16-bit codes familiar to Windows developers, where for example instead of en-US you say 0x0409. USB_LANGIDS.pdf on the usb.org developer site for more info. String requests using a LANGID not in this array should not be sent to the device. This property will cause some USB traffic the first time it is accessed and cache the resulting value for future use. """

        if self._langids is None:
            try:
                self._langids = util.get_langids(self)
            except USBError:
                self._langids = ()
        return self._langids