[ENH] Clearer error message on fitting fail of evaluate (#4545)

This PR improves the error message raised in `evaluate` when fitting fails for a forecaster. Raised by sevs on discord.
sktime · May 11, 2023 · b17abce · b17abce
1 parent f64032d
commit b17abce
Showing 1 changed file with 3 additions and 2 deletions.
diff --git a/sktime/forecasting/model_evaluation/_functions.py b/sktime/forecasting/model_evaluation/_functions.py
@@ -184,10 +184,11 @@ def _evaluate_window(
         else:
             warnings.warn(
                 f"""
-                Fitting of forecaster failed, you can set error_score='raise' to see
+                In evaluate, fitting of forecaster {type(forecaster).__name__} failed,
+                you can set error_score='raise' in evaluate to see
                 the exception message. Fit failed for len(y_train)={len(y_train)}.
                 The score will be set to {error_score}.
-                Failed forecaster: {forecaster}.
+                Failed forecaster with parameters: {forecaster}.
                 """,
                 FitFailedWarning,
                 stacklevel=2,