imports

from rest_framework.exceptions import PermissionDenied
from rest_framework import status

define class

class CustomExcpetion(PermissionDenied):
    status_code = status.HTTP_400_BAD_REQUEST
    default_detail = "Custom Exception Message"
    default_code = 'invalid'


    def __init__(self, detail, status_code=None):
        self.detail = detail
        if status_code is not None:
            self.status_code = status_code

use in methods

raise CustomExcpetion(
    detail=response.json(),
    status_code=response.status_code
)