DEBUG print

sklearn/isotonic.py

@@ -154,10 +154,18 @@ def isotonic_regression(
     """
     y = check_array(y, ensure_2d=False, input_name="y", dtype=[np.float64, np.float32])
     if sp_base_version >= parse_version("1.12.0"):
+        do_print = y.shape == (7,) and np.allclose(
+            y, np.array([10, 9, 10, 7, 6, 6.1, 5])
+        )
+        if do_print:
+            print("DEBUG INFO:")
+            print(f"{increasing=} {sample_weight=}\n{y=}")
         res = optimize.isotonic_regression(
             y=y, weights=sample_weight, increasing=increasing
         )
         y = np.asarray(res.x, dtype=y.dtype)
+        if do_print:
+            print(f"After isotonic_regression:\n{y=}")
     else:
         # TODO: remove this branch when Scipy 1.12 is the minimum supported version
         # Also remove _inplace_contiguous_isotonic_regression.