API Changes for 3.6.0#

Behaviour changes#

plt.get_cmap and matplotlib.cm.get_cmap return a copy#

Formerly, get_cmap and matplotlib.cm.get_cmap returned a global version of a Colormap. This was prone to errors as modification of the colormap would propagate from one location to another without warning. Now, a new copy of the colormap is returned.

Large imshow images are now downsampled#

When showing an image using imshow that has more than \(2^{24}\) columns or \(2^{23}\) rows, the image will now be downsampled to below this resolution before being resampled for display by the AGG renderer. Previously such a large image would be shown incorrectly. To prevent this downsampling and the warning it raises, manually downsample your data before handing it to imshow.

Default date limits changed to 1970-01-01 – 1970-01-02#

Previously the default limits for an empty axis set up for dates (Axis.axis_date) was 2000-01-01 to 2010-01-01. This has been changed to 1970-01-01 to 1970-01-02. With the default epoch, this makes the numeric limit for date axes the same as for other axes (0.0-1.0), and users are less likely to set a locator with far too many ticks.

markerfmt argument to stem#

The behavior of the markerfmt parameter of stem has changed:

  • If markerfmt does not contain a color, the color is taken from linefmt.

  • If markerfmt does not contain a marker, the default is 'o'.

Before, markerfmt was passed unmodified to plot(..., fmt), which had a number of unintended side-effects; e.g. only giving a color switched to a solid line without markers.

For a simple call stem(x, y) without parameters, the new rules still reproduce the old behavior.

get_ticklabels now always populates labels#

Previously Axis.get_ticklabels (and Axes.get_xticklabels, Axes.get_yticklabels) would only return empty strings unless a draw had already been performed. Now the ticks and their labels are updated when the labels are requested.

Warning when scatter plot color settings discarded#

When making an animation of a scatter plot, if you don't set c (the color value parameter) when initializing the artist, the color settings are ignored. Axes.scatter now raises a warning if color-related settings are changed without setting c.

3D contourf polygons placed between levels#

The polygons used in a 3D contourf plot are now placed halfway between the contour levels, as each polygon represents the location of values that lie between two levels.

Axes title now avoids y-axis offset#

Previously, Axes titles could overlap the y-axis offset text, which is often in the upper left corner of the axes. Now titles are moved above the offset text if overlapping when automatic title positioning is in effect (i.e. if y in Axes.set_title is None and rcParams["axes.titley"] (default: None) is also None).

Dotted operators gain extra space in mathtext#

In mathtext, \doteq \doteqdot \dotminus \dotplus \dots are now surrounded by extra space because they are correctly treated as relational or binary operators.

math parameter of mathtext.get_unicode_index defaults to False#

In math mode, ASCII hyphens (U+002D) are now replaced by Unicode minus signs (U+2212) at the parsing stage.

ArtistList proxies copy contents on iteration#

When iterating over the contents of the dynamically generated proxy lists for the Artist-type accessors (see Axes children are no longer separated by type), a copy of the contents is made. This ensure that artists can safely be added or removed from the Axes while iterating over their children.

This is a departure from the expected behavior of mutable iterable data types in Python — iterating over a list while mutating it has surprising consequences and dictionaries will error if they change size during iteration. Because all of the accessors are filtered views of the same underlying list, it is possible for seemingly unrelated changes, such as removing a Line, to affect the iteration over any of the other accessors. In this case, we have opted to make a copy of the relevant children before yielding them to the user.

This change is also consistent with our plan to make these accessors immutable in Matplotlib 3.7.

AxesImage string representation#

The string representation of AxesImage changes from stating the position in the figure "AxesImage(80,52.8;496x369.6)" to giving the number of pixels "AxesImage(size=(300, 200))".

Improved autoscaling for Bézier curves#

Bézier curves are now autoscaled to their extents - previously they were autoscaled to their ends and control points, which in some cases led to unnecessarily large limits.

QuadMesh mouseover defaults to False#

New in 3.5, QuadMesh.get_cursor_data allows display of data values under the cursor. However, this can be very slow for large meshes, so mouseover now defaults to False.

Changed pgf backend document class#

The pgf backend now uses the article document class as basis for compilation.

MathtextBackendAgg.get_results no longer returns used_characters#

The last item (used_characters) in the tuple returned by MathtextBackendAgg.get_results has been removed. In order to unpack this tuple in a backward and forward-compatible way, use e.g. ox, oy, width, height, descent, image, *_ = parse(...), which will ignore used_characters if it was present.

Type1Font objects include more properties#

The matplotlib._type1font.Type1Font.prop dictionary now includes more keys, such as CharStrings and Subrs. The value of the Encoding key is now a dictionary mapping codes to glyph names. The matplotlib._type1font.Type1Font.transform method now correctly removes UniqueID properties from the font.

rcParams.copy() returns RcParams rather than dict#

Returning an RcParams instance from RcParams.copy makes the copy still validate inputs, and additionally avoids emitting deprecation warnings when using a previously copied instance to update the global instance (even if some entries are deprecated).

rc_context no longer resets the value of 'backend'#

matplotlib.rc_context incorrectly reset the value of rcParams["backend"] if backend resolution was triggered in the context. This affected only the value. The actual backend was not changed. Now, matplotlib.rc_context does not reset rcParams["backend"] anymore.

Default rcParams["animation.convert_args"] changed#

It now defaults to ["-layers", "OptimizePlus"] to try to generate smaller GIFs. Set it back to an empty list to recover the previous behavior.

Style file encoding now specified to be UTF-8#

It has been impossible to import Matplotlib with a non UTF-8 compatible locale encoding because we read the style library at import time. This change is formalizing and documenting the status quo so there is no deprecation period.

MacOSX backend uses sRGB instead of GenericRGB color space#

MacOSX backend now display sRGB tagged image instead of GenericRGB which is an older (now deprecated) Apple color space. This is the source color space used by ColorSync to convert to the current display profile.

Renderer optional for get_tightbbox and get_window_extent#

The Artist.get_tightbbox and Artist.get_window_extent methods no longer require the renderer keyword argument, saving users from having to query it from fig.canvas.get_renderer. If the renderer keyword argument is not supplied, these methods first check if there is a cached renderer from a previous draw and use that. If there is no cached renderer, then the methods will use fig.canvas.get_renderer() as a fallback.

FigureFrameWx constructor, subclasses, and get_canvas#

The FigureCanvasWx constructor gained a canvas_class keyword-only parameter which specifies the canvas class that should be used. This parameter will become required in the future. The get_canvas method, which was previously used to customize canvas creation, is deprecated. The FigureFrameWxAgg and FigureFrameWxCairo subclasses, which overrode get_canvas, are deprecated.

FigureFrameWx.sizer#

... has been removed. The frame layout is no longer based on a sizer, as the canvas is now the sole child widget; the toolbar is now a regular toolbar added using SetToolBar.

Incompatible layout engines raise#

You cannot switch between tight_layout and constrained_layout if a colorbar has already been added to a figure. Invoking the incompatible layout engine used to warn, but now raises with a RuntimeError.

CallbackRegistry raises on unknown signals#

When Matplotlib instantiates a CallbackRegistry, it now limits callbacks to the signals that the registry knows about. In practice, this means that calling mpl_connect with an invalid signal name now raises a ValueError.

Changed exception type for incorrect SVG date metadata#

Providing date metadata with incorrect type to the SVG backend earlier resulted in a ValueError. Now, a TypeError is raised instead.

Specified exception types in Grid#

In a few cases an Exception was thrown when an incorrect argument value was set in the mpl_toolkits.axes_grid1.axes_grid.Grid (= mpl_toolkits.axisartist.axes_grid.Grid) constructor. These are replaced as follows:

  • Providing an incorrect value for ngrids now raises a ValueError

  • Providing an incorrect type for rect now raises a TypeError

Deprecations#

Parameters to plt.figure() and the Figure constructor#

All parameters to pyplot.figure and the Figure constructor, other than num, figsize, and dpi, will become keyword-only after a deprecation period.

Deprecation aliases in cbook#

The module matplotlib.cbook.deprecation was previously deprecated in Matplotlib 3.4, along with deprecation-related API in matplotlib.cbook. Due to technical issues, matplotlib.cbook.MatplotlibDeprecationWarning and matplotlib.cbook.mplDeprecation did not raise deprecation warnings on use. Changes in Python have now made it possible to warn when these aliases are being used.

In order to avoid downstream breakage, these aliases will now warn, and their removal has been pushed from 3.6 to 3.8 to give time to notice said warnings. As replacement, please use matplotlib.MatplotlibDeprecationWarning.

Axes subclasses should override clear instead of cla#

For clarity, axes.Axes.clear is now preferred over Axes.cla. However, for backwards compatibility, the latter will remain as an alias for the former.

For additional compatibility with third-party libraries, Matplotlib will continue to call the cla method of any Axes subclasses if they define it. In the future, this will no longer occur, and Matplotlib will only call the clear method in Axes subclasses.

It is recommended to define only the clear method when on Matplotlib 3.6, and only cla for older versions.

Pending deprecation top-level cmap registration and access functions in mpl.cm#

As part of a multi-step process we are refactoring the global state for managing the registered colormaps.

In Matplotlib 3.5 we added a ColormapRegistry class and exposed an instance at the top level as matplotlib.colormaps. The existing top level functions in matplotlib.cm (get_cmap, register_cmap, unregister_cmap) were changed to be aliases around the same instance.

In Matplotlib 3.6 we have marked those top level functions as pending deprecation with the intention of deprecation in Matplotlib 3.7. The following functions have been marked for pending deprecation:

The matplotlib.pyplot.get_cmap function will stay available for backward compatibility.

Pending deprecation of layout methods#

The methods set_tight_layout, set_constrained_layout, are discouraged, and now emit a PendingDeprecationWarning in favor of explicitly referencing the layout engine via figure.set_layout_engine('tight') and figure.set_layout_engine('constrained'). End users should not see the warning, but library authors should adjust.

The methods set_constrained_layout_pads and get_constrained_layout_pads are will be deprecated in favor of figure.get_layout_engine().set() and figure.get_layout_engine().get(), and currently emit a PendingDeprecationWarning.

seaborn styles renamed#

Matplotlib currently ships many style files inspired from the seaborn library ("seaborn", "seaborn-bright", "seaborn-colorblind", etc.) but they have gone out of sync with the library itself since the release of seaborn 0.9. To prevent confusion, the style files have been renamed "seaborn-v0_8", "seaborn-v0_8-bright", "seaborn-v0_8-colorblind", etc. Users are encouraged to directly use seaborn to access the up-to-date styles.

Auto-removal of overlapping Axes by plt.subplot and plt.subplot2grid#

Previously, pyplot.subplot and pyplot.subplot2grid would automatically remove preexisting Axes that overlap with the newly added Axes. This behavior was deemed confusing, and is now deprecated. Explicitly call ax.remove() on Axes that need to be removed.

Passing linefmt positionally to stem is undeprecated#

Positional use of all formatting parameters in stem has been deprecated since Matplotlib 3.5. This deprecation is relaxed so that one can still pass linefmt positionally, i.e. stem(x, y, 'r').

stem(..., use_line_collection=False)#

... is deprecated with no replacement. This was a compatibility fallback to a former more inefficient representation of the stem lines.

Positional / keyword arguments#

Passing all but the very few first arguments positionally in the constructors of Artists is deprecated. Most arguments will become keyword-only in a future version.

Passing too many positional arguments to tripcolor is now deprecated (extra arguments were previously silently ignored).

Passing emit and auto parameters of set_xlim, set_ylim, set_zlim, set_rlim positionally is deprecated; they will become keyword-only in a future release.

The transOffset parameter of Collection.set_offset_transform and the various create_collection methods of legend handlers has been renamed to offset_transform (consistently with the property name).

Calling MarkerStyle() with no arguments or MarkerStyle(None) is deprecated; use MarkerStyle("") to construct an empty marker style.

Axes.get_window_extent / Figure.get_window_extent accept only renderer. This aligns the API with the general Artist.get_window_extent API. All other parameters were ignored anyway.

The cleared parameter of get_renderer, which only existed for AGG-based backends, has been deprecated. Use renderer.clear() instead to explicitly clear the renderer buffer.

Methods to set parameters in LogLocator and LogFormatter*#

In LogFormatter and derived subclasses, the methods base and label_minor for setting the respective parameter are deprecated and replaced by set_base and set_label_minor, respectively.

In LogLocator, the methods base and subs for setting the respective parameter are deprecated. Instead, use set_params(base=..., subs=...).

Axes.get_renderer_cache#

The canvas now takes care of the renderer and whether to cache it or not. The alternative is to call axes.figure.canvas.get_renderer().

Groupers from get_shared_x_axes / get_shared_y_axes will be immutable#

Modifications to the Groupers returned by get_shared_x_axes and get_shared_y_axes are deprecated. In the future, these methods will return immutable views on the grouper structures. Note that previously, calling e.g. join() would already fail to set up the correct structures for sharing axes; use Axes.sharex or Axes.sharey instead.

Unused methods in Axis, Tick, XAxis, and YAxis#

Tick.label has been pending deprecation since 3.1 and is now deprecated. Use Tick.label1 instead.

The following methods are no longer used and deprecated without a replacement:

  • Axis.get_ticklabel_extents

  • Tick.get_pad_pixels

  • XAxis.get_text_heights

  • YAxis.get_text_widths

mlab.stride_windows#

... is deprecated. Use np.lib.stride_tricks.sliding_window_view instead (or np.lib.stride_tricks.as_strided on NumPy < 1.20).

Event handlers#

The draw_event, resize_event, close_event, key_press_event, key_release_event, pick_event, scroll_event, button_press_event, button_release_event, motion_notify_event, enter_notify_event and leave_notify_event methods of FigureCanvasBase are deprecated. They had inconsistent signatures across backends, and made it difficult to improve event metadata.

In order to trigger an event on a canvas, directly construct an Event object of the correct class and call canvas.callbacks.process(event.name, event).

Widgets#

All parameters to MultiCursor starting from useblit are becoming keyword-only (passing them positionally is deprecated).

The canvas and background attributes of MultiCursor are deprecated with no replacement.

The visible attribute of Selector widgets has been deprecated; use set_visible or get_visible instead.

The state_modifier_keys attribute of Selector widgets has been privatized and the modifier keys must be set when creating the widget.

Axes3D.dist#

... has been privatized. Use the zoom keyword argument in Axes3D.set_box_aspect instead.

3D Axis#

The previous constructor of axis3d.Axis, with signature (self, adir, v_intervalx, d_intervalx, axes, *args, rotate_label=None, **kwargs) is deprecated in favor of a new signature closer to the one of 2D Axis; it is now (self, axes, *, rotate_label=None, **kwargs) where kwargs are forwarded to the 2D Axis constructor. The axis direction is now inferred from the axis class' axis_name attribute (as in the 2D case); the adir attribute is deprecated.

The init3d method of 3D Axis is also deprecated; all the relevant initialization is done as part of the constructor.

The d_interval and v_interval attributes of 3D Axis are deprecated; use get_data_interval and get_view_interval instead.

The w_xaxis, w_yaxis, and w_zaxis attributes of Axis3D have been pending deprecation since 3.1. They are now deprecated. Instead use xaxis, yaxis, and zaxis.

mplot3d.axis3d.Axis.set_pane_pos is deprecated. This is an internal method where the provided values are overwritten during drawing. Hence, it does not serve any purpose to be directly accessible.

The two helper functions mplot3d.axis3d.move_from_center and mplot3d.axis3d.tick_update_position are considered internal and deprecated. If these are required, please vendor the code from the corresponding private methods _move_from_center and _tick_update_position.

Figure.callbacks is deprecated#

The Figure callbacks property is deprecated. The only signal was "dpi_changed", which can be replaced by connecting to the "resize_event" on the canvas figure.canvas.mpl_connect("resize_event", func) instead.

FigureCanvas without a required_interactive_framework attribute#

Support for such canvas classes is deprecated. Note that canvas classes which inherit from FigureCanvasBase always have such an attribute.

Backend-specific deprecations#

  • backend_gtk3.FigureManagerGTK3Agg and backend_gtk4.FigureManagerGTK4Agg; directly use backend_gtk3.FigureManagerGTK3 and backend_gtk4.FigureManagerGTK4 instead.

  • The window parameter to backend_gtk3.NavigationToolbar2GTK3 had no effect, and is now deprecated.

  • backend_gtk3.NavigationToolbar2GTK3.win

  • backend_gtk3.RendererGTK3Cairo and backend_gtk4.RendererGTK4Cairo; use RendererCairo instead, which has gained the set_context method, which also auto-infers the size of the underlying surface.

  • backend_cairo.RendererCairo.set_ctx_from_surface and backend_cairo.RendererCairo.set_width_height in favor of RendererCairo.set_context.

  • backend_gtk3.error_msg_gtk

  • backend_gtk3.icon_filename and backend_gtk3.window_icon

  • backend_macosx.NavigationToolbar2Mac.prepare_configure_subplots has been replaced by configure_subplots().

  • backend_pdf.Name.hexify

  • backend_pdf.Operator and backend_pdf.Op.op are deprecated in favor of a single standard enum.Enum interface on backend_pdf.Op.

  • backend_pdf.fill; vendor the code of the similarly named private functions if you rely on these functions.

  • backend_pgf.LatexManager.texcommand and backend_pgf.LatexManager.latex_header

  • backend_pgf.NO_ESCAPE

  • backend_pgf.common_texification

  • backend_pgf.get_fontspec

  • backend_pgf.get_preamble

  • backend_pgf.re_mathsep

  • backend_pgf.writeln

  • backend_ps.convert_psfrags

  • backend_ps.quote_ps_string; vendor the code of the similarly named private functions if you rely on it.

  • backend_qt.qApp; use QtWidgets.QApplication.instance() instead.

  • backend_svg.escape_attrib; vendor the code of the similarly named private functions if you rely on it.

  • backend_svg.escape_cdata; vendor the code of the similarly named private functions if you rely on it.

  • backend_svg.escape_comment; vendor the code of the similarly named private functions if you rely on it.

  • backend_svg.short_float_fmt; vendor the code of the similarly named private functions if you rely on it.

  • backend_svg.generate_transform and backend_svg.generate_css

  • backend_tk.NavigationToolbar2Tk.lastrect and backend_tk.RubberbandTk.lastrect

  • backend_tk.NavigationToolbar2Tk.window; use toolbar.master instead.

  • backend_tools.ToolBase.destroy; To run code upon tool removal, connect to the tool_removed_event event.

  • backend_wx.RendererWx.offset_text_height

  • backend_wx.error_msg_wx

  • FigureCanvasBase.pick; directly call Figure.pick, which has taken over the responsibility of checking the canvas widget lock as well.

  • FigureCanvasBase.resize, which has no effect; use FigureManagerBase.resize instead.

  • FigureManagerMac.close

  • FigureFrameWx.sizer; use frame.GetSizer() instead.

  • FigureFrameWx.figmgr and FigureFrameWx.get_figure_manager; use frame.canvas.manager instead.

  • FigureFrameWx.num; use frame.canvas.manager.num instead.

  • FigureFrameWx.toolbar; use frame.GetToolBar() instead.

  • FigureFrameWx.toolmanager; use frame.canvas.manager.toolmanager instead.

Modules#

The modules matplotlib.afm, matplotlib.docstring, matplotlib.fontconfig_pattern, matplotlib.tight_bbox, matplotlib.tight_layout, and matplotlib.type1font are considered internal and public access is deprecated.

checkdep_usetex deprecated#

This method was only intended to disable tests in case no latex install was found. As such, it is considered to be private and for internal use only.

Please vendor the code if you need this.

date_ticker_factory deprecated#

The date_ticker_factory method in the matplotlib.dates module is deprecated. Instead use AutoDateLocator and AutoDateFormatter for a more flexible and scalable locator and formatter.

If you need the exact date_ticker_factory behavior, please copy the code.

dviread.find_tex_file will raise FileNotFoundError#

In the future, dviread.find_tex_file will raise a FileNotFoundError for missing files. Previously, it would return an empty string in such cases. Raising an exception allows attaching a user-friendly message instead. During the transition period, a warning is raised.

transforms.Affine2D.identity()#

... is deprecated in favor of directly calling the Affine2D constructor with no arguments.

Deprecations in testing.decorators#

The unused class CleanupTestCase and decorator cleanup are deprecated and will be removed. Vendor the code, including the private function _cleanup_cm.

The function check_freetype_version is considered internal and deprecated. Vendor the code of the private function _check_freetype_version.

text.get_rotation()#

... is deprecated with no replacement. Copy the original implementation if needed.

Miscellaneous internals#

  • axes_grid1.axes_size.AddList; use sum(sizes, start=Fixed(0)) (for example) to sum multiple size objects.

  • axes_size.Padded; use size + pad instead

  • axes_size.SizeFromFunc, axes_size.GetExtentHelper

  • AxisArtistHelper.delta1 and AxisArtistHelper.delta2

  • axislines.GridHelperBase.new_gridlines and axislines.Axes.new_gridlines

  • cbook.maxdict; use the standard library functools.lru_cache instead.

  • _DummyAxis.dataLim and _DummyAxis.viewLim; use get_data_interval(), set_data_interval(), get_view_interval(), and set_view_interval() instead.

  • GridSpecBase.get_grid_positions(..., raw=True)

  • ImageMagickBase.delay and ImageMagickBase.output_args

  • MathtextBackend, MathtextBackendAgg, MathtextBackendPath, MathTextWarning

  • TexManager.get_font_config; it previously returned an internal hashed key for used for caching purposes.

  • TextToPath.get_texmanager; directly construct a texmanager.TexManager instead.

  • ticker.is_close_to_int; use math.isclose(x, round(x)) instead.

  • ticker.is_decade; use y = numpy.log(x)/numpy.log(base); numpy.isclose(y, numpy.round(y)) instead.

Removals#

The following deprecated APIs have been removed:

Removed behaviour#

Stricter validation of function parameters#

  • Unknown keyword arguments to Figure.savefig, pyplot.savefig, and the FigureCanvas.print_* methods now raise a TypeError, instead of being ignored.

  • Extra parameters to the Axes constructor, i.e., those other than fig and rect, are now keyword only.

  • Passing arguments not specifically listed in the signatures of Axes3D.plot_surface and Axes3D.plot_wireframe is no longer supported; pass any extra arguments as keyword arguments instead.

  • Passing positional arguments to LineCollection has been removed; use specific keyword argument names now.

imread no longer accepts URLs#

Passing a URL to imread() has been removed. Please open the URL for reading and directly use the Pillow API (e.g., PIL.Image.open(urllib.request.urlopen(url)), or PIL.Image.open(io.BytesIO(requests.get(url).content))) instead.

MarkerStyle is immutable#

The methods MarkerStyle.set_fillstyle and MarkerStyle.set_marker have been removed. Create a new MarkerStyle with the respective parameters instead.

Passing bytes to FT2Font.set_text#

... is no longer supported. Pass str instead.

Support for passing tool names to ToolManager.add_tool#

... has been removed. The second parameter to ToolManager.add_tool must now always be a tool class.

backend_tools.ToolFullScreen now inherits from ToolBase, not from ToolToggleBase#

ToolFullScreen can only switch between the non-fullscreen and fullscreen states, but not unconditionally put the window in a given state; hence the enable and disable methods were misleadingly named. Thus, the ToolToggleBase-related API (enable, disable, etc.) was removed.

BoxStyle._Base and transmute method of box styles#

... have been removed. Box styles implemented as classes no longer need to inherit from a base class.

Loaded modules logging#

The list of currently loaded modules is no longer logged at the DEBUG level at Matplotlib import time, because it can produce extensive output and make other valuable DEBUG statements difficult to find. If you were relying on this output, please arrange for your own logging (the built-in sys.modules can be used to get the currently loaded modules).

Modules#

Classes, methods and attributes#

The following module-level classes/variables have been removed:

  • cm.cmap_d

  • colorbar.colorbar_doc, colorbar.colorbar_kw_doc

  • ColorbarPatch

  • mathtext.Fonts and all its subclasses

  • mathtext.FontConstantsBase and all its subclasses

  • mathtext.latex_to_bakoma, mathtext.latex_to_cmex, mathtext.latex_to_standard

  • mathtext.MathtextBackendPdf, mathtext.MathtextBackendPs, mathtext.MathtextBackendSvg, mathtext.MathtextBackendCairo; use .MathtextBackendPath instead.

  • mathtext.Node and all its subclasses

  • mathtext.NUM_SIZE_LEVELS

  • mathtext.Parser

  • mathtext.Ship

  • mathtext.SHRINK_FACTOR and mathtext.GROW_FACTOR

  • mathtext.stix_virtual_fonts,

  • mathtext.tex2uni

  • backend_pgf.TmpDirCleaner

  • backend_ps.GraphicsContextPS; use GraphicsContextBase instead.

  • backend_wx.IDLE_DELAY

  • axes_grid1.parasite_axes.ParasiteAxesAuxTransBase; use ParasiteAxesBase instead.

  • axes_grid1.parasite_axes.ParasiteAxesAuxTrans; use ParasiteAxes instead.

The following class attributes have been removed:

  • Line2D.validCap and Line2D.validJoin; validation is centralized in rcsetup.

  • Patch.validCap and Patch.validJoin; validation is centralized in rcsetup.

  • renderer.M, renderer.eye, renderer.vvec, renderer.get_axis_position placed on the Renderer during 3D Axes draw; these attributes are all available via Axes3D, which can be accessed via self.axes on all Artists.

  • RendererPdf.mathtext_parser, RendererPS.mathtext_parser, RendererSVG.mathtext_parser, RendererCairo.mathtext_parser

  • StandardPsFonts.pswriter

  • Subplot.figbox; use Axes.get_position instead.

  • Subplot.numRows; ax.get_gridspec().nrows instead.

  • Subplot.numCols; ax.get_gridspec().ncols instead.

  • SubplotDivider.figbox

  • cids, cnt, observers, change_observers, and submit_observers on all Widgets

The following class methods have been removed:

  • Axis.cla(); use Axis.clear instead.

  • RadialAxis.cla() and ThetaAxis.cla(); use RadialAxis.clear or ThetaAxis.clear instead.

  • Spine.cla(); use Spine.clear instead.

  • ContourLabeler.get_label_coords(); there is no replacement as it was considered an internal helper.

  • FancyArrowPatch.get_dpi_cor and FancyArrowPatch.set_dpi_cor

  • FigureCanvas.get_window_title() and FigureCanvas.set_window_title(); use FigureManagerBase.get_window_title or FigureManagerBase.set_window_title if using pyplot, or use GUI-specific methods if embedding.

  • FigureManager.key_press() and FigureManager.button_press(); trigger the events directly on the canvas using canvas.callbacks.process(event.name, event) for key and button events.

  • RendererAgg.get_content_extents() and RendererAgg.tostring_rgba_minimized()

  • NavigationToolbar2Wx.get_canvas()

  • ParasiteAxesBase.update_viewlim(); use ParasiteAxesBase.apply_aspect instead.

  • Subplot.get_geometry(); use SubplotBase.get_subplotspec instead.

  • Subplot.change_geometry(); use SubplotBase.set_subplotspec instead.

  • Subplot.update_params(); this method did nothing.

  • Subplot.is_first_row(); use ax.get_subplotspec().is_first_row instead.

  • Subplot.is_first_col(); use ax.get_subplotspec().is_first_col instead.

  • Subplot.is_last_row(); use ax.get_subplotspec().is_last_row instead.

  • Subplot.is_last_col(); use ax.get_subplotspec().is_last_col instead.

  • SubplotDivider.change_geometry(); use SubplotDivider.set_subplotspec instead.

  • SubplotDivider.get_geometry(); use SubplotDivider.get_subplotspec instead.

  • SubplotDivider.update_params()

  • get_depth, parse, to_mask, to_rgba, and to_png of MathTextParser; use mathtext.math_to_image instead.

  • MovieWriter.cleanup(); the cleanup logic is instead fully implemented in MovieWriter.finish and cleanup is no longer called.

Functions#

The following functions have been removed;

  • backend_template.new_figure_manager(), backend_template.new_figure_manager_given_figure(), and backend_template.draw_if_interactive() have been removed, as part of the introduction of the simplified backend API.

  • Deprecation-related re-imports cbook.deprecated(), and cbook.warn_deprecated().

  • colorbar.colorbar_factory(); use Colorbar instead. colorbar.make_axes_kw_doc()

  • mathtext.Error()

  • mathtext.ship()

  • mathtext.tex2uni()

  • axes_grid1.parasite_axes.parasite_axes_auxtrans_class_factory(); use parasite_axes_class_factory instead.

  • sphinext.plot_directive.align(); use docutils.parsers.rst.directives.images.Image.align instead.

Arguments#

The following arguments have been removed:

rcParams#

The setting rcParams["ps.useafm"] (default: False) no longer has any effect on matplotlib.mathtext.

Development changes#

Increase to minimum supported versions of dependencies#

For Matplotlib 3.6, the minimum supported versions are being bumped:

Dependency

min in mpl3.5

min in mpl3.6

Python

3.7

3.8

NumPy

1.17

1.19

This is consistent with our Dependency version policy and NEP29

Build setup options changes#

The gui_support.macosx setup option has been renamed to packages.macosx.

New wheel architectures#

Wheels have been added for:

  • Python 3.11

  • PyPy 3.8 and 3.9

Increase to required versions of documentation dependencies#

sphinx >= 3.0 and numpydoc >= 1.0 are now required for building the documentation.

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