fix: Pair classification convert to dict (#4119)

fix pair classification

Author: Samoed

mteb/abstasks/pair_classification.py

@@ -115,7 +115,9 @@ def _evaluate_subset(
 
         if self.metadata.modalities == ["text"]:
             # for compatibility with v1 version where datasets were stored in a single row
-            data_split = data_split[0] if len(data_split) == 1 else data_split
+            data_split = (
+                Dataset.from_dict(data_split[0]) if len(data_split) == 1 else data_split
+            )
         evaluator = PairClassificationEvaluator(
             data_split,
             self.input1_column_name,

pyproject.toml

@@ -506,3 +506,4 @@ Altas = "Altas"
 matche = "matche"
 expresso = "expresso"
 Expresso = "Expresso"
+NIFE = "NIFE"