Fix as comment

mmengine/logging/logger.py

@@ -11,7 +11,7 @@
 from mmengine.utils.manager import _accquire_lock, _release_lock
 
 
-class UniqueWarningFilter(logging.Filter):
+class FilterDuplicateWarning(logging.Filter):
     """Filter the repeated warning message.
 
     Args:
@@ -34,9 +34,8 @@ def filter(self, record: LogRecord) -> bool:
         if record.levelno != logging.WARNING:
             return True
 
-        msg = record.msg
-        if msg not in self.seen:
-            self.seen.add(msg)
+        if record.msg not in self.seen:
+            self.seen.add(record.msg)
             return True
         return False
 
@@ -194,7 +193,7 @@ def __init__(self,
         # Only rank0 `StreamHandler` will log messages below error level.
         stream_handler.setLevel(log_level) if rank == 0 else \
             stream_handler.setLevel(logging.ERROR)
-        stream_handler.addFilter(UniqueWarningFilter(logger_name))
+        stream_handler.addFilter(FilterDuplicateWarning(logger_name))
         self.handlers.append(stream_handler)
 
         if log_file is not None:
@@ -222,7 +221,7 @@ def __init__(self,
                 file_handler.setFormatter(
                     MMFormatter(color=False, datefmt='%Y/%m/%d %H:%M:%S'))
                 file_handler.setLevel(log_level)
-                file_handler.addFilter(UniqueWarningFilter(logger_name))
+                file_handler.addFilter(FilterDuplicateWarning(logger_name))
                 self.handlers.append(file_handler)
 
     @classmethod