Attempting to display anything with Panel in a Jupyter Notebook in VS Code errors

[droumis]

ALL software version info

VSCODE: Version: 1.86.0

Python : 3.10.13 | packaged by conda-forge | (main, Dec 23 2023, 15:35:25) [Clang 16.0.6 ]
Operating system : macOS-13.5.2-arm64-arm-64bit
Panel comms : vscode
holoviews : 1.18.2
bokeh : 3.3.4
IPython : 8.21.0
jupyter_bokeh : 2.0.4
jupyterlab : 4.1.0
notebook : 7.0.7
panel : 1.3.8
param : 2.0.2
pyviz_comms : 3.0.0

Description of expected behavior and the observed behavior

Trying to displaying anything with Panel in a Jupyter Notebook in VS Code sometimes errors. The same cell executed in JupyterLab works fine.

I haven't been able to figure out under what conditions this occurs. As far as I've been able to tell, it will happen sometimes without changing anything in my env and then at some point start working again.

Complete, minimal, self-contained example code that reproduces the issue

import panel as pn; pn.extension()
pn.pane.Markdown('## Hello, World!')

Stack traceback and/or browser JavaScript console output

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
File ~/opt/miniconda3/envs/demo-cv2/lib/python3.10/site-packages/IPython/core/formatters.py:974, in MimeBundleFormatter.__call__(self, obj, include, exclude)
    971     method = get_real_method(obj, self.print_method)
    973     if method is not None:
--> 974         return method(include=include, exclude=exclude)
    975     return None
    976 else:

File ~/opt/miniconda3/envs/demo-cv2/lib/python3.10/site-packages/panel/viewable.py:782, in Viewable._repr_mimebundle_(self, include, exclude)
    779     loaded = hv.extension._loaded
    781 if config.comms in ('vscode', 'ipywidgets'):
--> 782     widget = ipywidget(self)
    783     if hasattr(widget, '_repr_mimebundle_'):
    784         return widget._repr_mimebundle_(include=include, exclude=exclude), {}

File ~/opt/miniconda3/envs/demo-cv2/lib/python3.10/site-packages/panel/io/notebook.py:555, in ipywidget(obj, doc, **kwargs)
    553 doc = doc if doc else Document()
    554 model = panel(obj, **kwargs).get_root(doc=doc)
--> 555 widget = BokehModel(model, combine_events=True)
    556 if hasattr(widget, '_view_count'):
    557     widget._view_count = 0

File ~/opt/miniconda3/envs/demo-cv2/lib/python3.10/site-packages/jupyter_bokeh/widgets.py:68, in BokehModel.__init__(self, model, **kwargs)
     66 def __init__(self, model, **kwargs):
     67     assert isinstance(model, LayoutDOM)
---> 68     self.update_from_model(model)
     69     super(BokehModel, self).__init__(**kwargs)
     70     self.on_msg(self._sync_model)

File ~/opt/miniconda3/envs/demo-cv2/lib/python3.10/site-packages/jupyter_bokeh/widgets.py:91, in BokehModel.update_from_model(self, model)
     89 def update_from_model(self, model):
     90     self._model = model
---> 91     self.render_bundle = self._model_to_traits(model)
     92     self._document.on_change_dispatch_to(self)

File ~/opt/miniconda3/envs/demo-cv2/lib/python3.10/site-packages/jupyter_bokeh/widgets.py:81, in BokehModel._model_to_traits(cls, model)
     79     document = Document()
     80     document.add_root(model)
---> 81 (docs_json, [render_item]) = standalone_docs_json_and_render_items([model], True)
     82 render_bundle = dict(
     83     docs_json=docs_json,
     84     render_items=[render_item.to_json()],
     85     div=div_for_render_item(render_item),
     86 )
     87 return render_bundle

TypeError: standalone_docs_json_and_render_items() takes 1 positional argument but 2 were given``

Screenshots or screencasts of the bug in action

• I may be interested in making a pull request to address this

[hoxbro]

This is because you have an old version of jupyter_bokeh installed, the latest version of it is 3.0.7, but that does not support Jupyterlab 4 yet, which is why you get the old version.

[droumis]

This should be fixed by bokeh/jupyter_bokeh#196. I'm going to close this since it's not a Panel issue