小编Sae*_*ghi的帖子

我想在django app中使用DjangoRestframework,但是在调用它时会出错？

打电话给我,我回复我:

Exception Type: AssertionError
Exception Value: Class CrawlerSerializers missing "Meta" attribute

但是我在serializer课堂上写了Meta Class

请帮我

serializers.py文件:

from rest_framework import serializers
from models import *

class CrawlerSerializers(serializers.ModelSerializer):
    class meta:
        model = Crawler
        fields = ('source','category','template','url')

我的View.py文件:

 from rest_framework import status
 from rest_framework.decorators import api_view
 from rest_framework.response import Response
 from models import *
 from serializers import *
 # Create your views here.
 @api_view(['GET','POST'])
 def crawler_list(request):
     '''
     list all task, or create a new task.
     '''
     if request.method == 'GET': …

为什么id'spython 2.7中的int变量只相等于256？

例如:

>>> y = 256
>>> m = 256
>>> m is y
True
>>> y = 257
>>> m = 257
>>> id(m)
16282096
>>> id(y)
16281952
>>> m is y
False