From 306529c079c0d8db92e7c0aedb6ce6e33eef7538 Mon Sep 17 00:00:00 2001
From: Hassieb Pakzad <68423100+hassiebp@users.noreply.github.com>
Date: Thu, 20 Nov 2025 13:50:26 +0100
Subject: [PATCH] docs(experiments): evaluation value cannot be None

---
 langfuse/experiment.py | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/langfuse/experiment.py b/langfuse/experiment.py
index f4c913c37..dc53a7d77 100644
--- a/langfuse/experiment.py
+++ b/langfuse/experiment.py
@@ -107,7 +107,6 @@ class Evaluation:
             - Numeric (int/float): For quantitative metrics like accuracy (0.85), BLEU (0.42)
             - String: For categorical results like "positive", "negative", "neutral"
             - Boolean: For binary assessments like "passes_safety_check"
-            - None: When evaluation cannot be computed (missing data, API errors, etc.)
         comment: Optional human-readable explanation of the evaluation result.
             Useful for providing context, explaining scoring rationale, or noting
             special conditions. Displayed in Langfuse UI for interpretability.
@@ -186,7 +185,7 @@ def __init__(
         self,
         *,
         name: str,
-        value: Union[int, float, str, bool, None],
+        value: Union[int, float, str, bool],
         comment: Optional[str] = None,
         metadata: Optional[Dict[str, Any]] = None,
         data_type: Optional[ScoreDataType] = None,