docs: add todo back

Author: shuoweil

bigframes/dataframe.py

@@ -823,6 +823,8 @@ def _repr_mimebundle_(self, include=None, exclude=None):
         Custom display method for IPython/Jupyter environments.
         This is called by IPython's display system when the object is displayed.
         """
+        # TODO(b/467647693): Anywidget integration has been tested in Jupyter, VS Code, and
+        # BQ Studio, but there is a known compatibility issue with Marimo that needs to be addressed.
         from bigframes.display import html
 
         return html.repr_mimebundle(self, include=include, exclude=exclude)

bigframes/display/html.py

@@ -233,13 +233,18 @@ def repr_mimebundle(
     """
     Custom display method for IPython/Jupyter environments.
     """
+    # TODO(b/467647693): Anywidget integration has been tested in Jupyter, VS Code, and
+    # BQ Studio, but there is a known compatibility issue with Marimo that needs to be addressed.
     from bigframes.series import Series
 
     opts = options.display
     if opts.repr_mode == "anywidget":
         try:
             return get_anywidget_bundle(obj, include=include, exclude=exclude)
         except ImportError:
+            # Anywidget is an optional dependency, so warn rather than fail.
+            # TODO(shuowei): When Anywidget becomes the default for all repr modes,
+            # remove this warning.
             warnings.warn(
                 "Anywidget mode is not available. "
                 "Please `pip install anywidget traitlets` or `pip install 'bigframes[anywidget]'` to use interactive tables. "

bigframes/series.py

@@ -573,6 +573,8 @@ def _repr_mimebundle_(self, include=None, exclude=None):
         Custom display method for IPython/Jupyter environments.
         This is called by IPython's display system when the object is displayed.
         """
+        # TODO(b/467647693): Anywidget integration has been tested in Jupyter, VS Code, and
+        # BQ Studio, but there is a known compatibility issue with Marimo that needs to be addressed.
         from bigframes.display import html
 
         return html.repr_mimebundle(self, include=include, exclude=exclude)