项目之问卷调查问题

1、问卷： 

    如果获取的数据不是直接可以展示的结构（共有三种方法） 

方式一：循环一次，生成数据

user_list = [
                        {'id':1,'name':'alex','age':19},
                        {'id':2,'name':'eric','age':18},
             ]
             new_user_list = []
             for item in user_list:
                  item["age"] = item["id"]+item["age"]
                  new_user_list.append(item["age"])
             return render(request,'test.html',{'user_list':new_user_list})

方式二：利用yield来实现
    def test(request):
                    user_list = [
                        {'id':1,'name':'alex','age':19},
                        {'id':2,'name':'eric','age':18},
                    ]

                    def inner(arg):
                        for item in arg:
                            yield {'id':item['id'], 'name':item['name'],'age':item['id']+item['age']}


                    return render(request,'test.html',{'user_list':inner(user_list)})

方式三：利用类，__item__、yield来实现
       class Foo(object):
                    def __init__(self,data):
                        self.data = data

                    def __iter__(self):
                        for item in self.data:
                            yield item

                def test(request):
                    user_list = [
                        {'id':1,'name':'alex','age':19},
                        {'id':2,'name':'eric','age':18},
                    ]
                    obj = Foo(user_list)
                    return render(request,'test.html',{'user_list':obj})