Update langfuse/langchain/CallbackHandler.py

Co-authored-by: ellipsis-dev[bot] <65095814+ellipsis-dev[bot]@users.noreply.github.com>

Author: hassiebp

langfuse/langchain/CallbackHandler.py

@@ -971,7 +971,7 @@ def _parse_usage_model(usage: typing.Union[pydantic.BaseModel, dict]) -> Any:
                     if "input" in usage_model:
                         usage_model["input"] = max(0, usage_model["input"] - value)
 
-    usage_model = {k: v for k, v in usage_model.items() if isinstance(v, int)}
+    usage_model = {k: v for k, v in usage_model.items() if type(v) is int}
 
     return usage_model if usage_model else None