[py] Incorporate reviewer feedback: simplify rpId handling and message extraction logic

Author: Paresh-0007

py/selenium/webdriver/common/virtual_authenticator.py

@@ -180,8 +180,6 @@ def to_dict(self) -> dict[str, Any]:
     def from_dict(cls, data: dict[str, Any]) -> "Credential":
         _id = urlsafe_b64decode(f"{data['credentialId']}==")
         is_resident_credential = bool(data["isResidentCredential"])
-        if "rpId" not in data:
-            raise KeyError("Missing required field 'rpId' in credential data.")
         rp_id = data["rpId"]
         private_key = urlsafe_b64decode(f"{data['privateKey']}==")
         sign_count = int(data["signCount"])

py/selenium/webdriver/remote/errorhandler.py

@@ -173,10 +173,7 @@ def check_response(self, response: dict[str, Any]) -> None:
                             message = value.get("value") or value.get("message")
                             if not isinstance(message, str):
                                 value = message
-                                if isinstance(message, dict):
-                                    message = message.get("message")
-                                else:
-                                    message = None
+                                message = message.get("message") if message is not None else None
                         else:
                             message = value.get("message", None)
                 except ValueError:
@@ -206,8 +203,7 @@ def check_response(self, response: dict[str, Any]) -> None:
 
         stacktrace = None
         st_value = None
-        if isinstance(value, dict):
-            st_value = value.get("stackTrace") or value.get("stacktrace")
+        st_value = value.get("stackTrace") or value.get("stacktrace")
         if st_value:
             if isinstance(st_value, str):
                 stacktrace = st_value.split("\n")