return Response(data=serializer.data, status=status.HTTP_200_OK, content_type="application/json")
content_type="application/json"去掉，写成：return Response(data=serializer.data, status=status.HTTP_200_OK)即可
django rest framework 的api返回html
原文：https://www.cnblogs.com/yushengzhou/p/9813892.html