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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 tagref(self, index):
 """Get the tag and reference number of a vgroup member, given the index number of that member. Args:: index member index (0 based) Returns:: 2-element tuple: - member tag - member reference number C library equivalent : Vgettagref """


        status, tag, ref = _C.Vgettagref(self._id, index)
        _checkErr('tagref', status, "illegal arguments")
        return tag, ref