def __repr__(self):
        return 'VX future [%i-%i %s] Exprires: %s' + (self.year,self.month,monthCode(self.month),
                                                        self.expirationDate())
#-------------------test functions---------------------------------------
dataset/ETHPy150Open sjev/trading-with-python/lib/cboe.py/VixFuture.__repr__/operator `%` -> `+`