flask standrad class 使用

from flask import Flask,views,url_for

app = Flask(__name__)

class IndexView(views.View):
    def dispatch_request(self): #必须实现

print(url_for('index'))
        return 'hello world'

app.add_url_rule('/',endpoint='index',view_func=IndexView.as_view('index'))

if __name__ == '__main__':
    app.run(debug=True)

#上面的类方法看起来并没有函数好用，那为什么还要用它。

#比如说有几个直传json数据的api
class JSONView(views.View):

    def get_data(self):
        raise NotImplementedError

    def dispatch_request(self):
        return jsonify(self.get_data())

class ListView(JSONView):
    def get_data(self):
        return {"username":"xiaowu","password":""}

app.add_url_rule('/list/',endpoint='list',view_func=ListView.as_view('list'))

#几个api要传递统一的变量
class UNIFYView(views.View):
    def __init__(self,*args,**kwargs):
        super().__init__(*args,**kwargs)
        self.content = {"abs":"今年过年不收礼，收礼只收女票"}

class LoginView(UNIFYView):
    def dispatch_request(self):
        self.content.update(
            username = "xiaowu",
            password = ""
        )
        return render_template('login.html',**self.content)

app.add_url_rule('/login/',endpoint='login',view_func=LoginView.as_view('login'))

class RegisterView(UNIFYView):
    def dispatch_request(self):
        return render_template('login.html', **self.content)

app.add_url_rule('/register/', endpoint='register', view_func=LoginView.as_view('register'))