python封装发送邮件类

import smtplib
from email.mime.text import MIMEText
from email.mime.multipart import MIMEMultipart
import os

class SendEMail(object):
    """封装发送邮件类"""

    def __init__(self, host: str, port: int, user: str, pwd: str):
        self.host = host
        self.port = port
        self.user = user
        self.pwd = pwd

    def __send(self, msg):
        try:
            smtpObj = smtplib.SMTP()
            smtpObj.connect(self.host, self.port)
            smtpObj.login(self.user, self.pwd)
            smtpObj.sendmail(self.user, msg["To"], msg.as_string())
            print("邮件发送成功")
        except Exception as e:
            print("邮件发送失败")

    def send_text(self, to_user: str, content: str, subject: str):
        """
        发送文本邮件
        :param to_user: 对方邮箱
        :param content: 邮件正文,文本格式
        :param subject: 邮件主题
        :return:
        """

        # 使用email构造邮件
        msg = MIMEText(content, _subtype='plain', _charset="utf8")
        msg["From"] = self.user
        msg["To"] = to_user
        msg["subject"] = subject

        self.__send(msg)

    def send_html(self, to_user: str, content: str, subject: str):
        """
        发送html格式邮件
        :param to_user: 对方邮箱
        :param content: 邮件正文，html格式
        :param subject: 邮件主题
        :return:
        """
        # 使用email构造邮件
        msg = MIMEText(content, _subtype='html', _charset="utf8")
        msg["From"] = self.user
        msg["To"] = to_user
        msg["subject"] = subject

        self.__send(msg)

    def send_attachment(self, to_user: str, content: str, subject: str, files: list):
        """
        发送附件邮件
        :param to_user: 对方邮箱
        :param content: 邮件正文，文本格式
        :param subject: 邮件主题
        :return:
        """
        # 创建一个带附件的实例
        msg = MIMEMultipart()
        msg['From'] = self.user
        msg['To'] = to_user
        msg['subject'] = subject
        # 邮件正文内容
        msg.attach(MIMEText(content, 'plain', 'utf-8'))
        # 构造附件
        for file in files:
            att = MIMEText(open(file, 'rb').read(), 'base64', 'utf-8')
            att["Content-Type"] = 'application/octet-stream'
            # 这里的filename可以任意写，写什么名字，邮件中显示什么名字
            _, file_name = os.path.split(file)
            att["Content-Disposition"] = 'attachment; filename="{}"'.format(file_name)
            msg.attach(att)
        self.__send(msg)