Deprecate and remove logging parameters in LightRAG.

- Set log_level and log_file_path to None by default
- Issue warnings if deprecated parameters are used
- Maintain backward compatibility with warnings

lightrag/lightrag.py

@@ -88,8 +88,8 @@ class LightRAG:
 
     # Logging (Deprecated, use setup_logger in utils.py instead)
     # ---
-    log_level: int = field(default=logger.level)
-    log_file_path: str = field(default=os.path.join(os.getcwd(), "lightrag.log"))
+    log_level: int | None = field(default=None)
+    log_file_path: str | None = field(default=None)
 
     # Entity extraction
     # ---
@@ -268,21 +268,23 @@ class LightRAG:
         )
 
         # Handle deprecated parameters
-        kwargs = self.__dict__
-        if "log_level" in kwargs:
+        if self.log_level is not None:
             warnings.warn(
                 "WARNING: log_level parameter is deprecated, use setup_logger in utils.py instead",
                 UserWarning,
                 stacklevel=2,
             )
-            # Remove the attribute to prevent its use
-            delattr(self, "log_level")
-        if "log_file_path" in kwargs:
+        if self.log_file_path is not None:
             warnings.warn(
                 "WARNING: log_file_path parameter is deprecated, use setup_logger in utils.py instead",
                 UserWarning,
                 stacklevel=2,
             )
+        
+        # Remove these attributes to prevent their use
+        if hasattr(self, "log_level"):
+            delattr(self, "log_level")
+        if hasattr(self, "log_file_path"):
             delattr(self, "log_file_path")
 
         initialize_share_data()