  from rest_framework.response import Response
  from rest_framework.settings import api_settings
  from rest_framework.test import APIRequestFactory
  from rest_framework.throttling import (
      BaseThrottle, ScopedRateThrottle, UserRateThrottle
  )
  from rest_framework.views import APIView
  
  
  class User3SecRateThrottle(UserRateThrottle):
 
</s>
    BaseThrottle, ScopedRateThrottle, SimpleRateThrottle, UserRateThrottle
  from rest_framework.response import Response
  from rest_framework.settings import api_settings
  from rest_framework.test import APIRequestFactory
  from rest_framework.throttling import (
    BaseThrottle, ScopedRateThrottle, SimpleRateThrottle, UserRateThrottle
  )
  from rest_framework.views import APIView
  
  
  class User3SecRateThrottle(UserRateThrottle):
keep keep keep keep replace keep keep keep keep keep
 Add couple of basic tests for SimpleRateThrottle (#4800)
tests/test_throttling.py