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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 inspect_virtual(self, stream_id):
 """Inspect the last value written into a virtual stream. Args: stream_id (int):
 The virtual stream was want to inspect. Returns: (int, int):
 An error code and the stream value. """


        stream = DataStream.FromEncoded(stream_id)

        if stream.buffered:
            return [pack_error(ControllerSubsystem.SENSOR_LOG, SensorLogError.VIRTUAL_STREAM_NOT_FOUND), 0]

        try:
            reading = self.storage.inspect_last(stream, only_allocated=True)
            return [Error.NO_ERROR, reading.value]
        except StreamEmptyError:
            return [Error.NO_ERROR, 0]
        except UnresolvedIdentifierError:
            return [pack_error(ControllerSubsystem.SENSOR_LOG, SensorLogError.VIRTUAL_STREAM_NOT_FOUND), 0]