support another strange BigBuy error format

bigbuy/exceptions.py

@@ -12,9 +12,8 @@
 from datetime import datetime, timedelta
 from typing import Optional, Union, Dict, Any, List, Type, cast, Sequence
 
-from requests import Response
-
 from bigbuy.rate_limit import RateLimit
+from requests import Response
 
 
 class BBError(Exception):
@@ -370,6 +369,10 @@ def raise_for_response(response: Response):
         bb_code = content["code"]
         message = content["message"]
 
+        # {"code": "Bad request", "message": 400}
+        if isinstance(message, int) and 400 <= message <= 599 and isinstance(bb_code, str):
+            bb_code, message = str(message), bb_code
+
     if "error_detail" in content and "different warehouses" in message:
         error_detail = content["error_detail"]
         if isinstance(error_detail, dict) and "warehouses" in error_detail:

tests/test_exceptions.py

@@ -147,6 +147,15 @@ def test_raise_for_response_soft_409():
     with pytest.raises(ex.BBResponseError, match="Something went wrong"):
         ex.raise_for_response(response)
 
+def test_raise_for_response_inverted_code_and_message():
+    response = Response()
+    response.status_code = 400
+    response.encoding = "utf-8"
+    payload = {'code': 'Bad request', 'message': 400}
+    response._content = json.dumps(payload).encode("utf-8")
+
+    with pytest.raises(ex.BBResponseError, match="Bad request"):
+        ex.raise_for_response(response)
 
 def test_raise_for_response_soft_error_headers_in_body():
     """