应该最终返回外部并且异常处理是否完美？

我不应该把这个方法的返回值放在finally中吗？ Pylint 给出了这句话的错误：3: return statement in finally block may swallow exception (lost-exception)

def sendMessage(self, subject, msgContent, files, mailto):
    """ Send the email message

        Args:
            subject(string): subject for the email
            msgContent(string): email message Content
            files(List): list of files to be attached
            mailto(string): email address to be sent to
    """

    msg = self.prepareMail(subject, msgContent, files, mailto)

    # connect to server and send email
    server=smtplib.SMTP(self.smtpserver, port=self.EMAIL_PORT)
    server.ehlo()
    # use encrypted SSL mode
    server.starttls()
    # to make starttls work
    server.ehlo()
    server.login(self.usrname, self.password)
    server.set_debuglevel(self.debug)
    try:
        failed = server.sendmail(self.mailFrom, mailto, msg.as_string())
    except Exception as er:
        print er
    finally:
        server.quit()
        if failed:
            return False
        return True

好吧，我解决了问题，@Nabla 指出了正确的方向！

def sendMessage(self, subject, msgContent, files, mailto):
    """ Send the email message

        Args:
            subject(string): subject for the email
            msgContent(string): email message Content
            files(List): list of files to be attached
            mailto(string): email address to be sent to
    """

    msg = self.prepareMail(subject, msgContent, files, mailto)

    # connect to server and send email
    server = smtplib.SMTP(self.smtpserver, port=self.EMAIL_PORT)
    server.ehlo()
    # use encrypted SSL mode
    server.starttls()
    # to make starttls work
    server.ehlo()
    server.login(self.usrname, self.password)
    server.set_debuglevel(self.debug)
    try:
        server.sendmail(self.mailFrom, mailto, msg.as_string())
    except Exception as er:
        print er
        return False
    finally:
        server.quit()
    return True