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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 _readse(self, pos):
 """Return interpretation of next bits as a signed exponential-Golomb code. Advances position to after the read code. Raises ReadError if the end of the bitstring is encountered while reading the code. """

        codenum, pos = self._readue(pos)
        m = (codenum + 1) // 2
        if not codenum % 2:
            return -m, pos
        else:
            return m, pos