基于django中间件延伸的编程思想(功能插拨式设计)

init.py

import settings
import importlib
def send_all(content):
    for path_str in settings.NOTIFY_FILES_DIR:   #循环配置文件内字符串
        module_path,class_name = path_str.rsplit('.',maxsplit=1)  #切片分开类名与模块路径
        module = importlib.import_module(module_path)  #导入模块
        cls = getattr(module,class_name)               #拿到类的名字
        obj = cls()
        obj.send(content)

email.py

class Email(object):
    def __init__(self):
        pass
    def send(self,content):
        print('邮箱通知:%s'%content)

wechat.py

class Wechat():
    def __init__(self):
        pass
    def send(self, content):
        print('微信通知:%s' % content)

run.py

import NOTIFY
NOTIFY.send_all('真尼玛难学')

settings.py

NOTIFY_FILES_DIR = [
    'NOTIFY.email.Email',
    'NOTIFY.wechat.Wechat',
]