Warnings with backend_nbagg

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Assessment

Difficulty
3/5
Estimated time
1-2 days
Newbie friendliness
30/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Stale
Tech stack
jupyter, python

Research direction

Start by reproducing the warning with pytest and the ipympl.backend_nbagg.new_figure_manager_given_figure call shown in the issue. Trace the Toolbar initialization and its interaction with ipywidgets and traitlets. Done means the reproduction no longer emits the reported DeprecationWarning and the relevant pytest run passes.

Written by the indexing model from the issue text.

Description

bug

Issue

There is a warning being triggered when running pytest with the following instruction:

ipympl.backend_nbagg.new_figure_manager_given_figure(1, matplotlib.figure.Figure()))

The warning is the following:

 /Users/luisaleixo/.pyenv/versions/3.9.6/envs/cara/lib/python3.9/site-packages/ipywidgets/widgets/widget.py:477: DeprecationWarning: Passing unrecognized arguments to super(Toolbar).__init__().
  __init__() missing 1 required positional argument: 'canvas'
  This is deprecated in traitlets 4.2.This error will be raised in a future release of traitlets.
    super(Widget, self).__init__(**kwargs)

It is not possible to downgrade the triatlets version for this project.

Versions

Name: ipympl
Version: 0.9.1

Name: pytest
Version: 6.2.5

Dominant language
Jupyter Notebook
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Forks
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