Replace try/except clause in IntEnum with a simple list cast

Author: Zsailer

jupyter_rtc_core/rooms/yroom.py

@@ -170,25 +170,13 @@ async def _process_message_queue(self) -> None:
             if message_type == YMessageType.SYNC and len(message) >= 2:
                 sync_message_subtype = message[1]
 
-            # Determine if message is invalid
-            # NOTE: In Python 3.12+, we can drop the try/except
-            # syntax for a much simpler `in` operator.
-            # e.g. message_type in YMessageType 
-            try:
 
-                YMessageType(message_type)
-                invalid_message_type = False
-            except ValueError:
-                invalid_message_type = True
-
-            invalid_sync_message_type = False
-            if message_type == YMessageType.SYNC:
-                try:
-                    # Check if YMessageType contain this message type.
-                    YSyncMessageSubtype(sync_message_subtype)
-                except ValueError:
-                    invalid_sync_message_type = True
 
+            # Determine if message is invalid
+            # NOTE: In Python 3.12+, we can drop list(...) call 
+            # according to https://docs.python.org/3/library/enum.html#enum.EnumType.__contains__
+            invalid_message_type = message_type not in list(YMessageType)
+            invalid_sync_message_type = message_type == YMessageType.SYNC and sync_message_subtype not in list(YSyncMessageSubtype)
             invalid_message = invalid_message_type or invalid_sync_message_type
 
             # Handle invalid messages by logging a warning and ignoring