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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 _setse(self, i):
 """Initialise bitstring with signed exponential-Golomb code for integer i."""

        if i > 0:
            u = (i * 2) - 1
        else:
            u = -2 * i
        self._setue(u)