Update the generic error handling again. Added type hints

app/errors/__init__.py

 from werkzeug.exceptions import HTTPException
-from .handlers import generic_error_handler
+from .handlers import generic
 
 
 def init_app(app):
-    app.register_error_handler(HTTPException, generic_error_handler)
+    app.register_error_handler(HTTPException, generic)

app/errors/handlers.py

 from flask import jsonify, render_template, request, Response
 from werkzeug.exceptions import HTTPException
+from typing import Tuple, Union
 
 
-def generic_error_handler(error: HTTPException):
+def generic(error: HTTPException) -> Tuple[Union[str, Response], int]:
+    ''' Generic error handler '''
     accent_json: bool = request.accept_mimetypes.accept_json
     accept_html: bool = request.accept_mimetypes.accept_html
     if accent_json and not accept_html:
         response: Response = jsonify(str(error))
-        response.status_code = error.code
-        return response
+        return response, error.code
     return render_template('errors/error.html.j2', error=error), error.code