fix meta

skbase/base/_meta.py

@@ -11,9 +11,8 @@
 from inspect import isclass
 from typing import TYPE_CHECKING, Any, Dict, List, Sequence, Tuple, Union, overload
 
-from sklearn.utils._estimator_html_repr import _VisualBlock
-
 from skbase.base._base import BaseEstimator, BaseObject
+from skbase.base._pretty_printing._object_html_repr import _VisualBlock
 from skbase.utils._iter import _format_seq_to_str, make_strings_unique
 from skbase.validate import is_named_object_tuple
 
@@ -657,8 +656,9 @@ def concat(x, y):
     def _sk_visual_block_(self):
         """Logic to help render meta estimator as visual HTML block."""
         # Use tag interface that will be available when mixin is used
-        named_object_attr = self.get_tag("named_object_parameters")  # type: ignore
-        named_objects = getattr(self, named_object_attr)
+        named_object_attr_name = self.get_tag("named_object_parameters")  # type: ignore
+        named_object_attr = getattr(self, named_object_attr_name)
+        named_objects = self._coerce_to_named_object_tuples(named_object_attr)
         _, objs = self._get_names_and_objects(named_objects)
 
         def _get_name(name, obj):
@@ -667,7 +667,7 @@ def _get_name(name, obj):
             # Is an estimator
             return f"{name}: {obj.__class__.__name__}"
 
-        names = [_get_name(name, est) for name, est in self.steps]
+        names = [_get_name(name, est) for name, est in named_objects]
         name_details = [str(obj) for obj in objs]
         return _VisualBlock(
             "serial",

skbase/base/_pretty_printing/_object_html_repr.py

@@ -7,7 +7,7 @@
 
 import html
 import uuid
-from contextlib import closing, suppress
+from contextlib import closing
 from io import StringIO
 from string import Template
 
@@ -91,7 +91,7 @@ def _write_label_html(
 
 def _get_visual_block(base_object):
     """Generate information about how to display a BaseObject."""
-    with suppress(AttributeError):
+    if hasattr(base_object, "_sk_visual_block_"):
         return base_object._sk_visual_block_()
 
     if isinstance(base_object, str):