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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 delete(self, tag, ref):
 """Delete from the vgroup the member identified by its tag and reference number. Args:: tag tag of the member to delete ref reference number of the member to delete Returns:: None Only the link of the member with the vgroup is deleted. The member object is not deleted. C library equivalent : Vdeletatagref """


        _checkErr('delete', _C.Vdeletetagref(self._id, tag, ref),
                  "error deleting member")