def has_extn(self, opt):
        return opt.lower() in self.esmtp_features
A tuple containing leading degrees in all variables.
dataset/ETHPy150Open deanhiller/databus/webapp/play1.3.x/python/Lib/smtplib.py/SMTP.has_extn--crossover with--dataset/ETHPy150Open sympy/sympy/sympy/polys/rings.py/PolyElement.degrees