def send(self, smtp, mail_options=[], rcpt_options=[]):
        """send(smtp_client, mail_options=[], rcpt_options=[])
Mails this envelope using the supplied SMTP client object."""
        if self.message:
            return smtp.sendmail(self.mail_from, self.rcpt_to, self.message.as_string(), mail_options, rcpt_options)
        elif self.data:
            return smtp.sendmail(self.mail_from, self.rcpt_to, self.data.getvalue(), mail_options, rcpt_options)
        else:
            body = (self.mail_from, ", ".join(self.rcpt_to)) % "From: %s\nTo: %s\n\nEnvelope message."
            return smtp.sendmail(self.mail_from, self.rcpt_to, body, mail_options, rcpt_options)
dataset/ETHPy150Open kdart/pycopia/core/pycopia/smtp_envelope.py/Envelope.send/swapped operands of `%`