Next API changes

This page lists API changes for the next release.

Behavior changes

• Behavior change template
• alpha parameter handling on images
• Minor log tick labels are set depending on number of major log ticks, not on number of decades spanned
• Setting titles of figures using webagg backend
• matplotlib.testing.check_figures_equal defaults to PNG only
• Mixing positional and keyword arguments for legend handles and labels...
• Legend labels for plot
• Axes.add_collection(..., autolim=True) updates view limits
• font_manager.findfont logs if selected font weight does not match requested
• FT2Font no longer sets a default size
• mathtext.VectorParse now includes glyph indices
• Default name of ListedColormap
• hist2d no longer forces axes limits
• Bivariate colormaps now fully span the intended range of colors
• Windows configuration directory location
• Rendering of images now more accurate
• Default style parameter of image_comparison
• pyplot.subplot and pyplot.subplot_mosaic raise ValueError on existing figures
• New environment variable to ignore system fonts

Deprecations

• Template for deprecations
• GridFinder.transform_xy and GridFinder.inv_transform_xy
• axes_grid.Grid.ngrids
• violinplot and violin vert parameter
• boxplot and bxp vert parameter, and rcParams["boxplot.vertical"]
• Parameter ListedColormap(..., N=...)
• 3rd party scales do not need to have an axis parameter anymore
• Capitalization of None in matplotlibrc
• DviFont.widths
• Direct access to Tfm's widths, heights, depths dicts
• Increase to minimum supported versions of dependencies
• testing.widgets.mock_event and testing.widgets.do_event
• PdfFile.fontNames, PdfFile.dviFontInfo, PdfFile.type1Descriptors
• FT2Image
• BezierSegment.point_at_t
• fontfile parameter of PdfFile.createType1Descriptor
• matplotlib.style.core
• Font kerning factor is deprecated
• font_manager.is_opentype_cff_font is deprecated
• Axes.set_navigate_mode is deprecated
• Parameters Axes3D.set_aspect(..., anchor=..., share=...)
• GridFinder.get_grid_info now takes a single bbox as parameter
• axisartist now uses more standard tick direction controls
• The axes parameter of RadialLocator
• PdfFile.multi_byte_charprocs
• In-place modifications of colormaps
• The canvas parameter to MultiCursor
• CallbackRegistry.disconnect cid parameter renamed to cid_or_func
• Transforms helper functions
• InvertedSymmetricalLogTransform.invlinthresh
• cbook.normalize_kwargs only supports passing artists and artist classes as second argument
• backend_svg.XMLWriter is deprecated
• kw, fontproperties, labelcolor, and verts attributes of QuiverKey
• Arbitrary code in axes.prop_cycle rcParam strings
• Contour labelling on filled contours
• image.thumbnail

Removals

• Removal change template
• plot_date
• apply_theta_transforms option in PolarTransform
• matplotlib.cm.get_cmap
• GridHelperCurveLinear.get_tick_iterator
• nth_coord parameter to axisartist helpers for fixed axis
• TransformNode.is_bbox
• rcsetup.interactive_bk, rcsetup.non_interactive_bk and rcsetup.all_backends
• BboxTransformToMaxOnly
• interval parameter of TimerBase.start

Development changes

• Development change template
• pip 25.1 suggested for development
• New minimum version of pyparsing
• Glyph indices now typed distinctly from character codes