Next API changes

• Behavior Change template
• The output of NonUniformImage and PcolorImage has changed
• Axes children are no longer separated by type
• Figure.suppressComposite now also controls compositing of Axes images
• Default theta tick locations for non-full-circle polar plots have changed
• axvspan now plots full wedges in polar plots
• MatplotlibDeprecationWarning now subclasses DeprecationWarning
• Colorbar lines no longer clipped
• Colorbar.patch is deprecated
• AxesDivider now defaults to rcParams-specified pads
• Artist.set applies artist properties in the order in which they are given
• Rename fist arg to subplot_mosaic
• Line2D.set_markeredgecolor(None) and Line2D.set_markerfacecolor(None)
• pcolor(mesh) shading defaults to auto
• Text allows a boolean parse_math
• Make norm from scale now public
• Type1Font objects now decrypt the encrypted part
• hatch.SmallFilledCircles now inherits from hatch.Circles
• Template for deprecations
• Locator and Formatter wrapper methods
• Auto-removal of grids by pcolor and pcolormesh
• Modification of Axes children sublists
• Passing incorrect types to Axes.add_* methods
• plot_date
• mpl_toolkits.axisartist.clip_path is deprecated
• cursord in GTK, Qt, and wx backends
• epoch2num and num2epoch are deprecated
• Unused positional parameters to print_<fmt> methods are deprecated
• is_url and URL_REGEX
• The format parameter of dviread.find_tex_file
• Text.get_prop_tup
• matplotlib.style.core deprecations
• Tick.apply_tickdir is deprecated
• Dvi.baseline
• "units finalize" signal
• drawtype argument to RectangleSelector
• Divider.get_vsize_hsize and Grid.get_vsize_hsize
• AxesDivider.append_axes(..., add_to_figure=False)
• tight_layout.auto_adjust_subplotpars
• ContourLabeler.get_label_width
• plot_directive internals deprecations
• SpanSelector
• font_manager helpers
• SubplotParams.validate
• The first parameter of Axes.grid and Axis.grid has been renamed to visible
• ParasiteAxesBase.get_images_artists
• The grid_info attribute of axisartist classes
• matplotlib.blocking_input
• cbook.report_memory
• QuadMesh signature
• floating_axes.GridHelperCurveLinear.get_boundary
• TexManager attributes
• QuadMesh.convert_mesh_to_paths and QuadMesh.convert_mesh_to_triangles
• rcParams will no longer cast inputs to str
• ConversionInterface.convert no longer needs to accept unitless values
• FancyArrowPatch.get_path_in_displaycoord and ConnectionPath.get_path_in_displaycoord
• backend_pgf.LatexManager.str_cache
• dviread.PsfontsMap now raises LookupError instead of KeyError for missing fonts
• :encoding: option to .. plot directive
• @pytest.mark.style is deprecated
• Unification of Selector API
• Selector widget state internals
• axes_grid1.axes_grid.CbarAxes and axes_grid1.axisartist.CbarAxes
• NavigationToolbar2.set_cursor and backend_tools.SetCursorBase.set_cursor
• backend_tools.SetCursorBase and subclasses
• FixedAxisArtistHelper.change_tick_coord
• All parameters of imshow starting from aspect will become keyword-only
• Case-insensitive scales
• matplotlib.streamplot.get_integrator
• Development Change template
• Increase to minimum supported versions of dependencies
• fontTools for type 42 subsetting
• Removal Change template
• The private matplotlib.axes._subplots._subplot_classes dict has been removed
• Support for passing None to subplot_class_factory has been removed
• Removed dates.YearLocator.replaced attribute
• ScalarMappable update checkers
• usetex-related removals
• Keymaps toggling Axes.get_navigate have been removed
• The mathtext.fallback_to_cm rcParams
• jpeg-related keywords and rcParams
• Qt4-based backends
• qt_compat.is_pyqt5
• matplotlib.backends.qt_editor.formsubplottool
• NavigationToolbar2._init_toolbar
• NavigationToolbar2.press and .release
• NavigationToolbar2QT.parent and .basedir
• NavigationToolbar2QT.ctx
• NavigationToolbar2Wx attributes
• Statusbar classes and attributes
• Backend-specific internals
• Stricter PDF metadata keys in PGF
• The TTFPATH and AFMPATH environment variables
• mathtext Glue classes
• ismath parameter of draw_tex
• Deprecated rcParams validators
• Stricter rcParam validation
• Removed modules
• Removal of deprecated offsetbox APIs
• Removal of axes_grid/axisartist APIs deprecated in Matplotlib 3.3
• Axis and Locator pan and zoom
• Ticker Locators and Formatters
• Removal of cbook deprecations
• Collection's offset_position has been removed
• Colorbar related removals
• Axes.pie radius, startangle, and normalize parameters
• Signatures of Artist.draw and Axes.draw
• Axes.update_datalim_bounds
• {,Symmetrical}LogScale.{,Inverted}LogTransform
• log/symlog scale base, ticks, and nonpos specification
• Implicit initialization of Tick attributes
• Unused parameters
• figure.add_axes() without arguments
• All parameters of Figure.subplots except nrows and ncols are now keyword-only
• add_subplot() validates its inputs
• SubplotSpec.get_rows_columns
• autofmt_xdate(which=None)
• pyplot.tight_layout parameters are now keyword-only
• Parameters norm and vmin/vmax may not be used simultaneously
• Axes.annotate and pyplot.annotate parameter name changed
• orientation of eventplot() and EventCollection
• ContourSet.ax, Quiver.ax
• fontdict and minor parameters of Axes.set_xticklabels / Axes.set_yticklabels are now keyword-only
• Case-insensitive properties
• Case-insensitive capstyles and joinstyles
• AVConv animation writers removed
• MovieWriter attributes
• Artist-specific removals
• Path helpers
• BboxBase.inverse_transformed
• matplotlib.test(recursionlimit=...)
• testing.compare.make_external_conversion_command
• docstring.Substitution.from_params
• widgets.TextBox.params_to_disable
• widgets.SubplotTool callbacks and axes
• Variants on ToolManager.update_keymap calls
• MaxNLocator passing nbins in two ways

Dragging selectors Behavior Change template