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fix: preserve non-ASCII characters in JSON serialization #1512

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fix: preserve non-ASCII characters in JSON serialization #1512

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0a38cb5
fix: preserve non-ASCII characters in JSON serialization
edwardpwtsoi Feb 5, 2026
549bfb4
fix: set ensure_ascii=False in EventSerializer constructor instead of…
edwardpwtsoi Feb 5, 2026
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1 change: 1 addition & 0 deletions langfuse/_client/utils.py
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Expand Up @@ -59,6 +59,7 @@ def span_formatter(span: ReadableSpan) -> str:
"instrumentationScope": instrumentationScope,
},
indent=2,
ensure_ascii=False,
)
+ "\n"
)
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1 change: 1 addition & 0 deletions langfuse/_utils/serializer.py
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Expand Up @@ -37,6 +37,7 @@ class Serializable: # type: ignore

class EventSerializer(JSONEncoder):
def __init__(self, *args: Any, **kwargs: Any) -> None:
kwargs.setdefault("ensure_ascii", False)
super().__init__(*args, **kwargs)
self.seen: set[int] = set() # Track seen objects to detect circular references

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