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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 _getuie(self):
 """Return data as unsigned interleaved exponential-Golomb code. Raises InterpretError if bitstring is not a single exponential-Golomb code. """

        try:
            value, newpos = self._readuie(0)
            if value is None or newpos != self.len:
                raise ReadError
        except ReadError:
            raise InterpretError("Bitstring is not a single interleaved exponential-Golomb code.")
        return value