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flake8 reports the expected error:

./tools.py:62:9: F401 'mpl_toolkits.mplot3d.Axes3D' imported but unused
I know it can be avoided using the # NOQA comment. But is there a different way to formulate the projection in the figure so that the Axes3D object is used?
If this is only about actually using the import at least once, you can do
ax = fig.gca(projection=Axes3D.name)
as "3d" is the name of the Axes3D class by which it is registered to the projection list.
                Would this be how it is intended to be used, or is it a coincidence that the projection list and class name both use the string 3d?
– Jonathan Holvey
                Jun 18, 2018 at 1:43
                @Jonathan Holvey The projection list contains all registered classes' names. Hence Axes3D.name is exactly what to put there if an Axes3D is to be created.
– ImportanceOfBeingErnest
                Jun 18, 2018 at 9:03
        
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