Fix: avoid ambiguous truth value for empty numpy array in HuggingfaceEmbeddings (fixes #2080) (#2308)

Title:
Fix ambiguous truth value for empty NumPy arrays in
HuggingfaceEmbeddings (fixes #2080)

Description:
This PR resolves an issue where HuggingfaceEmbeddings would raise a
ValueError when evaluating an empty NumPy array in a boolean context.

Problem:
Directly checking a NumPy array with if array: is ambiguous when the
array is empty or multidimensional, leading to errors like:

ValueError: The truth value of an array with more than one element is
ambiguous.

This could occur when users try to generate embeddings with empty
inputs.

Solution:

Added an explicit check for empty arrays before any boolean evaluation.

Ensures that the embedding function handles empty inputs safely without
errors.

Testing:

Verified embeddings for non-empty inputs work as expected.

Confirmed empty inputs no longer raise errors.

Monorepo CI pipeline passes successfully (lint, formatting, and tests).

Related Issue:
Fixes #2080Title:
Fix ambiguous truth value for empty NumPy arrays in
HuggingfaceEmbeddings (fixes #2080)

Author: Rahul2512Chauhan

src/ragas/embeddings/base.py

@@ -475,7 +475,8 @@ def __post_init__(self):
             np.intersect1d(
                 list(MODEL_FOR_SEQUENCE_CLASSIFICATION_MAPPING_NAMES.values()),
                 config.architectures or [],
-            )
+            ).size
+            != 0
         )
 
         if self.is_cross_encoder: