Python 实现接口类的两种方式+邮件提醒+动态导入模块+反射（参考Django中间件源码）

Posted 2020-10-19 听风。

实现接口类的两种方式

方式一

from abc import ABCMeta
from abc import abstractmethod

class BaseMessage(metaclass=ABCMeta):

    @abstractmethod
    def send(self,subject,body,to,name):
        pass

 

方式二

class BaseMessage(object):
    def send(self, subject, body, to, name):
        raise NotImplementedError(‘未实现send方法‘)

 

邮件提醒

import smtplib
from email.mime.text import MIMEText
from email.utils import formataddr
from .base import BaseMessage

class Email(BaseMessage):
    def __init__(self):
        self.email = "寄件人的邮箱地址"
        self.user = "寄件人姓名"
        self.pwd = ‘邮箱密码或SMTP授权码‘

    def send(self,subject,body,to,name):
        ‘‘‘
        :param subject: 主题
        :param body: 内容
        :param to:接受者
        :param name:接受者姓名
        :return:
        ‘‘‘

        msg = MIMEText(body, ‘plain‘, ‘utf-8‘)  # 发送内容
        msg[‘From‘] = formataddr([self.user,self.email])  # 发件人
        msg[‘To‘] = formataddr([name, to])  # 收件人
        msg[‘Subject‘] = subject # 主题


        server = smtplib.SMTP("smtp.126.com", 25) # SMTP服务
        server.login(self.email, self.pwd) # 邮箱用户名和密码
        server.sendmail(self.email, [to, ], msg.as_string()) # 发送者和接收者
        server.quit()

 

 

动态导入模块+反射

settings

# ################## 自定义消息提醒的配置 ###################
MESSAGE_CLASSES = [
    ‘utils.message.email.Email‘,
    ‘utils.message.msg.Msg‘,
    ‘utils.message.wx.WeChat‘,
    ‘utils.message.dingding.DingDing‘,
]

 

 

import importlib
from django.conf import settings
def send_message(to,name,subject,body):
    """
    短信、邮件、微信
    :param to: 接受者 
    :param name: 接受者姓名
    :param subject: 主题
    :param body: 内容
    :return: 
    """
    for cls_path in settings.MESSAGE_CLASSES:
        # cls_path是字符串
        module_path,class_name = cls_path.rsplit(‘.‘,maxsplit=1)
        m = importlib.import_module(module_path)
        obj = getattr(m,class_name)()
        obj.send(subject,body,to,name,)