def smtp_VRFY(self, arg):
        # For max compatibility smtplib should be sending the raw address.
        if sim_users in arg:
            self.push('250 %s %s' % (sim_users[arg], smtplib.quoteaddr(arg)))
        else:
            self.push('550 No such user: %s' % arg)
dataset/ETHPy150Open amrdraz/kodr/app/brython/www/src/Lib/test/test_smtplib.py/SimSMTPChannel.smtp_VRFY/swapped operands of `in`