From 7410b1d4361c42e52d6527ed96e69349cbb84378 Mon Sep 17 00:00:00 2001 From: Jason Dai Date: Fri, 6 Mar 2026 14:33:25 -0800 Subject: [PATCH] fix: GenAI Client(evals) - Add datetime and bytes serialization to _json_serializer PiperOrigin-RevId: 879823535 --- vertexai/_genai/_evals_visualization.py | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/vertexai/_genai/_evals_visualization.py b/vertexai/_genai/_evals_visualization.py index 5637c867c6..d9319f7406 100644 --- a/vertexai/_genai/_evals_visualization.py +++ b/vertexai/_genai/_evals_visualization.py @@ -15,6 +15,7 @@ """Visualization utilities for GenAI Evaluation SDK.""" import base64 +import datetime import html import json import logging @@ -44,6 +45,10 @@ def _pydantic_serializer(obj: Any) -> Any: """Custom serializer for Pydantic models.""" if hasattr(obj, "model_dump"): return obj.model_dump(mode="json") + if isinstance(obj, datetime.datetime): + return obj.isoformat() + if isinstance(obj, bytes): + return base64.b64encode(obj).decode("utf-8") raise TypeError(f"Object of type {obj.__class__.__name__} is not JSON serializable")