matplotlib / matplotlib/ipympl
Warnings with backend_nbagg
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bug
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- Jupyter Notebook
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Description
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
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
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.
Assessment
- Tech stack
- jupyter, python
- Domain
- backend, testing-qa
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 30/100