中间件

中间件

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from flask import Flask app = Flask(__name__) app.secret_key = 'asdfasdfasdf'   @app.route('/x2',methods=['GET','POST']) def index():     return "x2"     class Middleware(object):     def __init__(self,old_wsgi_app):         """         服务端启动时，自动执行         :param old_wsgi_app:         """         self.old_wsgi_app =old_wsgi_app       def __call__(self, environ, start_response):         """         每次有用户请求道来时         :param args:         :param kwargs:         :return:         """         print('before')         from flask import session,request         obj = self.old_wsgi_app(environ, start_response)         print('after')         return obj   if __name__ == '__main__':     app.wsgi_app = Middleware(app.wsgi_app)     app.run()     """     1.执行app.__call__     2.在调用app.wsgi_app方法     """

方法和函数

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from types import MethodType,FunctionType   class Foo(object):     def fetch(self):         pass   print(isinstance(Foo.fetch,MethodType)) print(isinstance(Foo.fetch,FunctionType)) # True   obj = Foo() print(isinstance(obj.fetch,MethodType)) # True print(isinstance(obj.fetch,FunctionType))