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<section id="api-changes-for-3-1-0">
<h1>API Changes for 3.1.0<a class="headerlink" href="#api-changes-for-3-1-0" title="Permalink to this heading">#</a></h1>
<nav class="contents local" id="contents">
<ul class="simple">
<li><p><a class="reference internal" href="#behavior-changes" id="id2">Behavior changes</a></p></li>
<li><p><a class="reference internal" href="#pgi-support-dropped" id="id3"><code class="docutils literal notranslate"><span class="pre">pgi</span></code> support dropped</a></p></li>
<li><p><a class="reference internal" href="#rcparam-changes" id="id4">rcParam changes</a></p></li>
<li><p><a class="reference internal" href="#exception-changes" id="id5">Exception changes</a></p></li>
<li><p><a class="reference internal" href="#removals" id="id6">Removals</a></p></li>
<li><p><a class="reference internal" href="#matplotlib-mlab-removals" id="id7"><a class="reference internal" href="../mlab_api.html#module-matplotlib.mlab" title="matplotlib.mlab"><code class="xref py py-mod docutils literal notranslate"><span class="pre">matplotlib.mlab</span></code></a> removals</a></p></li>
<li><p><a class="reference internal" href="#pylab-removals" id="id8"><a class="reference internal" href="../index.html#module-pylab" title="pylab"><code class="xref py py-obj docutils literal notranslate"><span class="pre">pylab</span></code></a> removals</a></p></li>
<li><p><a class="reference internal" href="#mplot3d-changes" id="id9">mplot3d changes</a></p></li>
<li><p><a class="reference internal" href="#testing" id="id10">Testing</a></p></li>
<li><p><a class="reference internal" href="#dependency-changes" id="id11">Dependency changes</a></p></li>
<li><p><a class="reference internal" href="#mathtext-changes" id="id12">Mathtext changes</a></p></li>
<li><p><a class="reference internal" href="#signature-deprecations" id="id13">Signature deprecations</a></p></li>
<li><p><a class="reference internal" href="#changes-in-parameter-names" id="id14">Changes in parameter names</a></p></li>
<li><p><a class="reference internal" href="#class-method-attribute-deprecations" id="id15">Class/method/attribute deprecations</a></p></li>
<li><p><a class="reference internal" href="#undeprecations" id="id16">Undeprecations</a></p></li>
<li><p><a class="reference internal" href="#new-features" id="id17">New features</a></p></li>
<li><p><a class="reference internal" href="#invalid-inputs" id="id18">Invalid inputs</a></p></li>
</ul>
</nav>
<section id="behavior-changes">
<h2><a class="toc-backref" href="#id2" role="doc-backlink">Behavior changes</a><a class="headerlink" href="#behavior-changes" title="Permalink to this heading">#</a></h2>
<section id="matplotlib-use">
<h3>Matplotlib.use<a class="headerlink" href="#matplotlib-use" title="Permalink to this heading">#</a></h3>
<p>Switching backends via <a class="reference internal" href="../matplotlib_configuration_api.html#matplotlib.use" title="matplotlib.use"><code class="xref py py-obj docutils literal notranslate"><span class="pre">matplotlib.use</span></code></a> is now allowed by default,
regardless of whether <a class="reference internal" href="../pyplot_summary.html#module-matplotlib.pyplot" title="matplotlib.pyplot"><code class="xref py py-obj docutils literal notranslate"><span class="pre">matplotlib.pyplot</span></code></a> has been imported. If the user
tries to switch from an already-started interactive backend to a different
interactive backend, an <a class="reference external" href="https://docs.python.org/3/library/exceptions.html#ImportError" title="(in Python v3.11)"><code class="xref py py-obj docutils literal notranslate"><span class="pre">ImportError</span></code></a> will be raised.</p>
</section>
<section id="invalid-points-in-pathcollections">
<h3>Invalid points in PathCollections<a class="headerlink" href="#invalid-points-in-pathcollections" title="Permalink to this heading">#</a></h3>
<p>PathCollections created with <a class="reference internal" href="../_as_gen/matplotlib.axes.Axes.scatter.html#matplotlib.axes.Axes.scatter" title="matplotlib.axes.Axes.scatter"><code class="xref py py-obj docutils literal notranslate"><span class="pre">scatter</span></code></a> now keep track of invalid points.
Previously, points with nonfinite (infinite or nan) coordinates would not be
included in the offsets (as returned by <a class="reference internal" href="../collections_api.html#matplotlib.collections.PathCollection.get_offsets" title="matplotlib.collections.PathCollection.get_offsets"><code class="xref py py-obj docutils literal notranslate"><span class="pre">PathCollection.get_offsets</span></code></a>) of a
<a class="reference internal" href="../collections_api.html#matplotlib.collections.PathCollection" title="matplotlib.collections.PathCollection"><code class="xref py py-obj docutils literal notranslate"><span class="pre">PathCollection</span></code></a> created by <a class="reference internal" href="../_as_gen/matplotlib.axes.Axes.scatter.html#matplotlib.axes.Axes.scatter" title="matplotlib.axes.Axes.scatter"><code class="xref py py-obj docutils literal notranslate"><span class="pre">scatter</span></code></a>, and points with nonfinite values
(as specified by the <em>c</em> kwarg) would not be included in the array (as returned
by <a class="reference internal" href="../collections_api.html#matplotlib.collections.PathCollection.get_array" title="matplotlib.collections.PathCollection.get_array"><code class="xref py py-obj docutils literal notranslate"><span class="pre">PathCollection.get_array</span></code></a>)</p>
<p>Such points are now included, but masked out by returning a masked array.</p>
<p>If the <em>plotnonfinite</em> kwarg to <a class="reference internal" href="../_as_gen/matplotlib.axes.Axes.scatter.html#matplotlib.axes.Axes.scatter" title="matplotlib.axes.Axes.scatter"><code class="xref py py-obj docutils literal notranslate"><span class="pre">scatter</span></code></a> is set, then points
with nonfinite values are plotted using the bad color of the
<a class="reference internal" href="../collections_api.html#matplotlib.collections.PathCollection" title="matplotlib.collections.PathCollection"><code class="xref py py-obj docutils literal notranslate"><span class="pre">collections.PathCollection</span></code></a>'s colormap (as set by
<a class="reference internal" href="../_as_gen/matplotlib.colors.Colormap.html#matplotlib.colors.Colormap.set_bad" title="matplotlib.colors.Colormap.set_bad"><code class="xref py py-meth docutils literal notranslate"><span class="pre">colors.Colormap.set_bad()</span></code></a>).</p>
</section>
<section id="alpha-blending-in-imshow-of-rbga-input">
<h3>Alpha blending in imshow of RBGA input<a class="headerlink" href="#alpha-blending-in-imshow-of-rbga-input" title="Permalink to this heading">#</a></h3>
<p>The alpha-channel of RBGA images is now re-sampled independently of
RGB channels. While this is a bug fix, it does change the output and
may result in some down-stream image comparison tests to fail.</p>
</section>
<section id="autoscaling">
<h3>Autoscaling<a class="headerlink" href="#autoscaling" title="Permalink to this heading">#</a></h3>
<p>On log-axes where a single value is plotted at a "full" decade (1, 10, 100,
etc.), the autoscaling now expands the axis symmetrically around that point,
instead of adding a decade only to the right.</p>
</section>
<section id="log-scaled-axes">
<h3>Log-scaled axes<a class="headerlink" href="#log-scaled-axes" title="Permalink to this heading">#</a></h3>
<p>When the default <a class="reference internal" href="../ticker_api.html#matplotlib.ticker.LogLocator" title="matplotlib.ticker.LogLocator"><code class="xref py py-obj docutils literal notranslate"><span class="pre">LogLocator</span></code></a> would generate no ticks for an axis (e.g., an
axis with limits from 0.31 to 0.39) or only a single tick, it now instead falls
back on the linear <a class="reference internal" href="../ticker_api.html#matplotlib.ticker.AutoLocator" title="matplotlib.ticker.AutoLocator"><code class="xref py py-obj docutils literal notranslate"><span class="pre">AutoLocator</span></code></a> to pick reasonable tick positions.</p>
</section>
<section id="figure-add-subplot-with-no-arguments">
<h3><a class="reference internal" href="../figure_api.html#matplotlib.figure.Figure.add_subplot" title="matplotlib.figure.Figure.add_subplot"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Figure.add_subplot</span></code></a> with no arguments<a class="headerlink" href="#figure-add-subplot-with-no-arguments" title="Permalink to this heading">#</a></h3>
<p>Calling <a class="reference internal" href="../figure_api.html#matplotlib.figure.Figure.add_subplot" title="matplotlib.figure.Figure.add_subplot"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Figure.add_subplot()</span></code></a> with no positional arguments used to do
nothing; this now is equivalent to calling <code class="docutils literal notranslate"><span class="pre">add_subplot(111)</span></code> instead.</p>
</section>
<section id="bxp-and-rcparams">
<h3><a class="reference internal" href="../_as_gen/matplotlib.axes.Axes.bxp.html#matplotlib.axes.Axes.bxp" title="matplotlib.axes.Axes.bxp"><code class="xref py py-obj docutils literal notranslate"><span class="pre">bxp</span></code></a> and rcparams<a class="headerlink" href="#bxp-and-rcparams" title="Permalink to this heading">#</a></h3>
<p><a class="reference internal" href="../_as_gen/matplotlib.axes.Axes.bxp.html#matplotlib.axes.Axes.bxp" title="matplotlib.axes.Axes.bxp"><code class="xref py py-obj docutils literal notranslate"><span class="pre">bxp</span></code></a> now respects <code class="docutils literal notranslate"><a class="reference internal" href="../../tutorials/introductory/customizing.html?highlight=boxplot.boxprops.linewidth#matplotlibrc-sample"><span class="std std-ref"><span class="pre">rcParams["boxplot.boxprops.linewidth"]</span></span></a></code> (default: <code class="docutils literal notranslate"><span class="pre">1.0</span></code>) even when
<em>patch_artist</em> is set.
Previously, when the <em>patch_artist</em> parameter was set, <a class="reference internal" href="../_as_gen/matplotlib.axes.Axes.bxp.html#matplotlib.axes.Axes.bxp" title="matplotlib.axes.Axes.bxp"><code class="xref py py-obj docutils literal notranslate"><span class="pre">bxp</span></code></a> would ignore
<code class="docutils literal notranslate"><a class="reference internal" href="../../tutorials/introductory/customizing.html?highlight=boxplot.boxprops.linewidth#matplotlibrc-sample"><span class="std std-ref"><span class="pre">rcParams["boxplot.boxprops.linewidth"]</span></span></a></code> (default: <code class="docutils literal notranslate"><span class="pre">1.0</span></code>). This was an oversight -- in particular,
<a class="reference internal" href="../_as_gen/matplotlib.axes.Axes.boxplot.html#matplotlib.axes.Axes.boxplot" title="matplotlib.axes.Axes.boxplot"><code class="xref py py-obj docutils literal notranslate"><span class="pre">boxplot</span></code></a> did not ignore it.</p>
</section>
<section id="major-minor-tick-collisions">
<h3>Major/minor tick collisions<a class="headerlink" href="#major-minor-tick-collisions" title="Permalink to this heading">#</a></h3>
<p>Minor ticks that collide with major ticks are now hidden by default.
Previously, certain locator classes (<a class="reference internal" href="../ticker_api.html#matplotlib.ticker.LogLocator" title="matplotlib.ticker.LogLocator"><code class="xref py py-obj docutils literal notranslate"><span class="pre">LogLocator</span></code></a>,
<a class="reference internal" href="../ticker_api.html#matplotlib.ticker.AutoMinorLocator" title="matplotlib.ticker.AutoMinorLocator"><code class="xref py py-obj docutils literal notranslate"><span class="pre">AutoMinorLocator</span></code></a>) contained custom logic to avoid emitting
tick locations that collided with major ticks when they were used as
minor locators. This logic has now moved to the <a class="reference internal" href="../axis_api.html#matplotlib.axis.Axis" title="matplotlib.axis.Axis"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Axis</span></code></a> class,
and is used regardless of the locator class. You can control this
behavior via the <a class="reference internal" href="../_as_gen/matplotlib.axis.Axis.remove_overlapping_locs.html#matplotlib.axis.Axis.remove_overlapping_locs" title="matplotlib.axis.Axis.remove_overlapping_locs"><code class="xref py py-obj docutils literal notranslate"><span class="pre">remove_overlapping_locs</span></code></a> attribute on
<a class="reference internal" href="../axis_api.html#matplotlib.axis.Axis" title="matplotlib.axis.Axis"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Axis</span></code></a>.</p>
<p>If you were relying on both the major and minor tick labels to appear
on the same tick, you may need to update your code. For example, the
following snippet</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="kn">import</span> <span class="nn">numpy</span> <span class="k">as</span> <span class="nn">np</span>
<span class="kn">import</span> <span class="nn">matplotlib.dates</span> <span class="k">as</span> <span class="nn">mdates</span>
<span class="kn">import</span> <span class="nn">matplotlib.pyplot</span> <span class="k">as</span> <span class="nn">plt</span>
<span class="n">t</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">arange</span><span class="p">(</span><span class="s2">"2018-11-03"</span><span class="p">,</span> <span class="s2">"2018-11-06"</span><span class="p">,</span> <span class="n">dtype</span><span class="o">=</span><span class="s2">"datetime64"</span><span class="p">)</span>
<span class="n">x</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">random</span><span class="o">.</span><span class="n">rand</span><span class="p">(</span><span class="nb">len</span><span class="p">(</span><span class="n">t</span><span class="p">))</span>
<span class="n">fig</span><span class="p">,</span> <span class="n">ax</span> <span class="o">=</span> <span class="n">plt</span><span class="o">.</span><span class="n">subplots</span><span class="p">()</span>
<span class="n">ax</span><span class="o">.</span><span class="n">plot</span><span class="p">(</span><span class="n">t</span><span class="p">,</span> <span class="n">x</span><span class="p">)</span>
<span class="n">ax</span><span class="o">.</span><span class="n">xaxis</span><span class="o">.</span><span class="n">set</span><span class="p">(</span>
<span class="n">major_locator</span><span class="o">=</span><span class="n">mdates</span><span class="o">.</span><span class="n">DayLocator</span><span class="p">(),</span>
<span class="n">major_formatter</span><span class="o">=</span><span class="n">mdates</span><span class="o">.</span><span class="n">DateFormatter</span><span class="p">(</span><span class="s2">"</span><span class="se">\n</span><span class="si">%a</span><span class="s2">"</span><span class="p">),</span>
<span class="n">minor_locator</span><span class="o">=</span><span class="n">mdates</span><span class="o">.</span><span class="n">HourLocator</span><span class="p">((</span><span class="mi">0</span><span class="p">,</span> <span class="mi">6</span><span class="p">,</span> <span class="mi">12</span><span class="p">,</span> <span class="mi">18</span><span class="p">)),</span>
<span class="n">minor_formatter</span><span class="o">=</span><span class="n">mdates</span><span class="o">.</span><span class="n">DateFormatter</span><span class="p">(</span><span class="s2">"%H:%M"</span><span class="p">),</span>
<span class="p">)</span>
<span class="c1"># disable removing overlapping locations</span>
<span class="n">ax</span><span class="o">.</span><span class="n">xaxis</span><span class="o">.</span><span class="n">remove_overlapping_locs</span> <span class="o">=</span> <span class="kc">False</span>
<span class="n">plt</span><span class="o">.</span><span class="n">show</span><span class="p">()</span>
</pre></div>
</div>
<p>labeled days using major ticks, and hours and minutes using minor
ticks and added a newline to the major ticks labels to avoid them
crashing into the minor tick labels. Setting the
<a class="reference internal" href="../_as_gen/matplotlib.axis.Axis.remove_overlapping_locs.html#matplotlib.axis.Axis.remove_overlapping_locs" title="matplotlib.axis.Axis.remove_overlapping_locs"><code class="xref py py-obj docutils literal notranslate"><span class="pre">remove_overlapping_locs</span></code></a> property (also accessible via
<a class="reference internal" href="../_as_gen/matplotlib.axis.Axis.set_remove_overlapping_locs.html#matplotlib.axis.Axis.set_remove_overlapping_locs" title="matplotlib.axis.Axis.set_remove_overlapping_locs"><code class="xref py py-obj docutils literal notranslate"><span class="pre">set_remove_overlapping_locs</span></code></a> /
<a class="reference internal" href="../_as_gen/matplotlib.axis.Axis.get_remove_overlapping_locs.html#matplotlib.axis.Axis.get_remove_overlapping_locs" title="matplotlib.axis.Axis.get_remove_overlapping_locs"><code class="xref py py-obj docutils literal notranslate"><span class="pre">get_remove_overlapping_locs</span></code></a> and <a class="reference internal" href="../_as_gen/matplotlib.pyplot.setp.html#matplotlib.pyplot.setp" title="matplotlib.pyplot.setp"><code class="xref py py-obj docutils literal notranslate"><span class="pre">setp</span></code></a>) disables
removing overlapping tick locations.</p>
<p>The major tick labels could also be adjusted include hours and
minutes, as the minor ticks are gone, so the <code class="docutils literal notranslate"><span class="pre">major_formatter</span></code>
would be:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">mdates</span><span class="o">.</span><span class="n">DateFormatter</span><span class="p">(</span><span class="s2">"%H:%M</span><span class="se">\n</span><span class="si">%a</span><span class="s2">"</span><span class="p">)</span>
</pre></div>
</div>
</section>
<section id="usetex-support">
<h3>usetex support<a class="headerlink" href="#usetex-support" title="Permalink to this heading">#</a></h3>
<p>Previously, if <code class="docutils literal notranslate"><a class="reference internal" href="../../tutorials/introductory/customizing.html?highlight=text.usetex#matplotlibrc-sample"><span class="std std-ref"><span class="pre">rcParams["text.usetex"]</span></span></a></code> (default: <code class="docutils literal notranslate"><span class="pre">False</span></code>) was True, then constructing a <a class="reference internal" href="../text_api.html#matplotlib.text.TextPath" title="matplotlib.text.TextPath"><code class="xref py py-obj docutils literal notranslate"><span class="pre">TextPath</span></code></a> on
a non-mathtext string with <code class="docutils literal notranslate"><span class="pre">usetex=False</span></code> would rely on the mathtext parser
(but not on usetex support!) to parse the string. The mathtext parser is not
invoked anymore, which may cause slight changes in glyph positioning.</p>
</section>
<section id="get-window-extents">
<h3>get_window_extents<a class="headerlink" href="#get-window-extents" title="Permalink to this heading">#</a></h3>
<p><a class="reference internal" href="../_as_gen/matplotlib.axes.Axes.get_window_extent.html#matplotlib.axes.Axes.get_window_extent" title="matplotlib.axes.Axes.get_window_extent"><code class="xref py py-obj docutils literal notranslate"><span class="pre">matplotlib.axes.Axes.get_window_extent</span></code></a> used to return a bounding box
that was slightly larger than the axes, presumably to take into account
the ticks that may be on a spine. However, it was not scaling the tick sizes
according to the dpi of the canvas, and it did not check if the ticks were
visible, or on the spine.</p>
<p>Now <a class="reference internal" href="../_as_gen/matplotlib.axes.Axes.get_window_extent.html#matplotlib.axes.Axes.get_window_extent" title="matplotlib.axes.Axes.get_window_extent"><code class="xref py py-obj docutils literal notranslate"><span class="pre">matplotlib.axes.Axes.get_window_extent</span></code></a> just returns the axes extent
with no padding for ticks.</p>
<p>This affects <a class="reference internal" href="../_as_gen/matplotlib.axes.Axes.get_tightbbox.html#matplotlib.axes.Axes.get_tightbbox" title="matplotlib.axes.Axes.get_tightbbox"><code class="xref py py-obj docutils literal notranslate"><span class="pre">matplotlib.axes.Axes.get_tightbbox</span></code></a> in cases where there are
outward ticks with no tick labels, and it also removes the (small) pad around
axes in that case.</p>
<p><a class="reference internal" href="../spines_api.html#matplotlib.spines.Spine.get_window_extent" title="matplotlib.spines.Spine.get_window_extent"><code class="xref py py-obj docutils literal notranslate"><span class="pre">spines.Spine.get_window_extent</span></code></a> now takes into account ticks that are on the
spine.</p>
</section>
<section id="sankey">
<h3>Sankey<a class="headerlink" href="#sankey" title="Permalink to this heading">#</a></h3>
<p>Previously, <a class="reference internal" href="../sankey_api.html#matplotlib.sankey.Sankey.add" title="matplotlib.sankey.Sankey.add"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Sankey.add</span></code></a> would only accept a single string as the <em>labels</em>
argument if its length is equal to the number of flows, in which case it would
use one character of the string for each flow.</p>
<p>The behavior has been changed to match the documented one: when a single string
is passed, it is used to label all the flows.</p>
</section>
<section id="fontmanager-scores">
<h3><a class="reference internal" href="../font_manager_api.html#matplotlib.font_manager.FontManager" title="matplotlib.font_manager.FontManager"><code class="xref py py-obj docutils literal notranslate"><span class="pre">FontManager</span></code></a> scores<a class="headerlink" href="#fontmanager-scores" title="Permalink to this heading">#</a></h3>
<p><a class="reference internal" href="../font_manager_api.html#matplotlib.font_manager.FontManager.score_weight" title="matplotlib.font_manager.FontManager.score_weight"><code class="xref py py-obj docutils literal notranslate"><span class="pre">font_manager.FontManager.score_weight</span></code></a> is now more strict with its
inputs. Previously, when a weight string was passed to
<a class="reference internal" href="../font_manager_api.html#matplotlib.font_manager.FontManager.score_weight" title="matplotlib.font_manager.FontManager.score_weight"><code class="xref py py-obj docutils literal notranslate"><span class="pre">font_manager.FontManager.score_weight</span></code></a>,</p>
<ul class="simple">
<li><p>if the weight was the string representation of an integer, it would be
converted to that integer,</p></li>
<li><p>otherwise, if the weight was not a standard weight name, it would be silently
replaced by a value of 500 ("normal" weight).</p></li>
</ul>
<p><a class="reference internal" href="../font_manager_api.html#matplotlib.font_manager.FontManager.score_weight" title="matplotlib.font_manager.FontManager.score_weight"><code class="xref py py-obj docutils literal notranslate"><span class="pre">font_manager.FontManager.score_weight</span></code></a> now raises an exception on such inputs.</p>
</section>
<section id="text-alignment">
<h3>Text alignment<a class="headerlink" href="#text-alignment" title="Permalink to this heading">#</a></h3>
<p>Text alignment was previously incorrect, in particular for multiline text
objects with large descenders (i.e. subscripts) and rotated text. These have
been fixed and made more consistent, but could make old code that has
compensated for this no longer have the correct alignment.</p>
</section>
<section id="upper-case-color-strings">
<h3>Upper case color strings<a class="headerlink" href="#upper-case-color-strings" title="Permalink to this heading">#</a></h3>
<p>Support for passing single-letter colors (one of "rgbcmykw") as UPPERCASE
characters is deprecated; these colors will become case-sensitive (lowercase)
after the deprecation period has passed.</p>
<p>The goal is to decrease the number of ambiguous cases when using the <code class="docutils literal notranslate"><span class="pre">data</span></code>
keyword to plotting methods; e.g. <code class="docutils literal notranslate"><span class="pre">plot("X",</span> <span class="pre">"Y",</span> <span class="pre">data={"X":</span> <span class="pre">...,</span> <span class="pre">"Y":</span> <span class="pre">...})</span></code>
will not warn about "Y" possibly being a color anymore after the deprecation
period has passed.</p>
</section>
<section id="degenerate-limits">
<h3>Degenerate limits<a class="headerlink" href="#degenerate-limits" title="Permalink to this heading">#</a></h3>
<p>When bounds passed to <a class="reference internal" href="../_as_gen/matplotlib.axes.Axes.set_xlim.html#matplotlib.axes.Axes.set_xlim" title="matplotlib.axes.Axes.set_xlim"><code class="xref py py-obj docutils literal notranslate"><span class="pre">set_xlim</span></code></a> are degenerate (i.e. the
lower and upper value are equal), the method used to "expand" the
bounds now matches the expansion behavior of autoscaling when the plot
contains a single x-value, and should in particular produce nicer
limits for non-linear scales.</p>
</section>
<section id="plot-format-string-parsing">
<h3><a class="reference internal" href="../_as_gen/matplotlib.axes.Axes.plot.html#matplotlib.axes.Axes.plot" title="matplotlib.axes.Axes.plot"><code class="xref py py-obj docutils literal notranslate"><span class="pre">plot</span></code></a> format string parsing<a class="headerlink" href="#plot-format-string-parsing" title="Permalink to this heading">#</a></h3>
<p>In certain cases, <a class="reference internal" href="../_as_gen/matplotlib.axes.Axes.plot.html#matplotlib.axes.Axes.plot" title="matplotlib.axes.Axes.plot"><code class="xref py py-obj docutils literal notranslate"><span class="pre">plot</span></code></a> would previously accept format strings
specifying more than one linestyle (e.g. <code class="docutils literal notranslate"><span class="pre">"---."</span></code> which specifies both
<code class="docutils literal notranslate"><span class="pre">"--"</span></code> and <code class="docutils literal notranslate"><span class="pre">"-."</span></code>); only use one of them would be used. This now raises a
<a class="reference external" href="https://docs.python.org/3/library/exceptions.html#ValueError" title="(in Python v3.11)"><code class="xref py py-obj docutils literal notranslate"><span class="pre">ValueError</span></code></a> instead.</p>
</section>
<section id="htmlwriter">
<h3>HTMLWriter<a class="headerlink" href="#htmlwriter" title="Permalink to this heading">#</a></h3>
<p>The HTMLWriter constructor is more strict: it no longer normalizes unknown
values of <em>default_mode</em> to 'loop', but errors out instead.</p>
</section>
<section id="afm-parsing">
<h3>AFM parsing<a class="headerlink" href="#afm-parsing" title="Permalink to this heading">#</a></h3>
<p>In accordance with the AFM spec, the AFM parser no longer truncates the
<code class="docutils literal notranslate"><span class="pre">UnderlinePosition</span></code> and <code class="docutils literal notranslate"><span class="pre">UnderlineThickness</span></code> fields to integers.</p>
<p>The <code class="docutils literal notranslate"><span class="pre">Notice</span></code> field (which can only be publicly accessed by the deprecated
<code class="docutils literal notranslate"><span class="pre">afm.parse_afm</span></code> API) is no longer decoded to a <a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#str" title="(in Python v3.11)"><code class="xref py py-obj docutils literal notranslate"><span class="pre">str</span></code></a>, but instead kept as
<a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#bytes" title="(in Python v3.11)"><code class="xref py py-obj docutils literal notranslate"><span class="pre">bytes</span></code></a>, to support non-conformant AFM files that use non-ASCII characters in
that field.</p>
</section>
<section id="artist-set-keyword-normalisation">
<h3><a class="reference internal" href="../_as_gen/matplotlib.artist.Artist.set.html#matplotlib.artist.Artist.set" title="matplotlib.artist.Artist.set"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Artist.set</span></code></a> keyword normalisation<a class="headerlink" href="#artist-set-keyword-normalisation" title="Permalink to this heading">#</a></h3>
<p><a class="reference internal" href="../_as_gen/matplotlib.artist.Artist.set.html#matplotlib.artist.Artist.set" title="matplotlib.artist.Artist.set"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Artist.set</span></code></a> now normalizes keywords before sorting them. Previously it sorted
its keyword arguments in reverse alphabetical order (with a special-case to
put <code class="docutils literal notranslate"><span class="pre">color</span></code> at the end) before applying them.</p>
<p>It now normalizes aliases (and, as above, emits a warning on duplicate
properties) before doing the sorting (so <code class="docutils literal notranslate"><span class="pre">c</span></code> goes to the end too).</p>
</section>
<section id="axes-tick-params-argument-checking">
<h3><a class="reference internal" href="../_as_gen/matplotlib.axes.Axes.tick_params.html#matplotlib.axes.Axes.tick_params" title="matplotlib.axes.Axes.tick_params"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Axes.tick_params</span></code></a> argument checking<a class="headerlink" href="#axes-tick-params-argument-checking" title="Permalink to this heading">#</a></h3>
<p>Previously <a class="reference internal" href="../_as_gen/matplotlib.axes.Axes.tick_params.html#matplotlib.axes.Axes.tick_params" title="matplotlib.axes.Axes.tick_params"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Axes.tick_params</span></code></a> silently did nothing when an invalid <em>axis</em>
parameter was supplied. This behavior has been changed to raise a <a class="reference external" href="https://docs.python.org/3/library/exceptions.html#ValueError" title="(in Python v3.11)"><code class="xref py py-obj docutils literal notranslate"><span class="pre">ValueError</span></code></a>
instead.</p>
</section>
<section id="axes-hist-output">
<h3><a class="reference internal" href="../_as_gen/matplotlib.axes.Axes.hist.html#matplotlib.axes.Axes.hist" title="matplotlib.axes.Axes.hist"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Axes.hist</span></code></a> output<a class="headerlink" href="#axes-hist-output" title="Permalink to this heading">#</a></h3>
<p>Input that consists of multiple empty lists will now return a list of histogram
values for each one of the lists. For example, an input of <code class="docutils literal notranslate"><span class="pre">[[],[]]</span></code> will
return 2 lists of histogram values. Previously, a single list was returned.</p>
</section>
<section id="backend-bases-timerbase-remove-callback-future-signature-change">
<h3><code class="docutils literal notranslate"><span class="pre">backend_bases.TimerBase.remove_callback</span></code> future signature change<a class="headerlink" href="#backend-bases-timerbase-remove-callback-future-signature-change" title="Permalink to this heading">#</a></h3>
<p>Currently, <code class="docutils literal notranslate"><span class="pre">backend_bases.TimerBase.remove_callback(func,</span> <span class="pre">*args,</span>
<span class="pre">**kwargs)</span></code> removes a callback previously added by
<code class="docutils literal notranslate"><span class="pre">backend_bases.Timer.add_callback(func,</span> <span class="pre">*args,</span> <span class="pre">**kwargs)</span></code>, but if
<code class="docutils literal notranslate"><span class="pre">*args,</span> <span class="pre">**kwargs</span></code> is not passed in (i.e.,
<code class="docutils literal notranslate"><span class="pre">TimerBase.remove_callback(func)</span></code>), then the first callback with a
matching <code class="docutils literal notranslate"><span class="pre">func</span></code> is removed, regardless of whether it was added with
or without <code class="docutils literal notranslate"><span class="pre">*args,</span> <span class="pre">**kwargs</span></code>.</p>
<p>In a future version, <a class="reference internal" href="../backend_bases_api.html#matplotlib.backend_bases.TimerBase.remove_callback" title="matplotlib.backend_bases.TimerBase.remove_callback"><code class="xref py py-obj docutils literal notranslate"><span class="pre">TimerBase.remove_callback</span></code></a> will always use the latter
behavior (not consider <code class="docutils literal notranslate"><span class="pre">*args,</span> <span class="pre">**kwargs</span></code>); to specifically consider them, add
the callback as a <a class="reference external" href="https://docs.python.org/3/library/functools.html#functools.partial" title="(in Python v3.11)"><code class="xref py py-obj docutils literal notranslate"><span class="pre">functools.partial</span></code></a> object</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">cb</span> <span class="o">=</span> <span class="n">timer</span><span class="o">.</span><span class="n">add_callback</span><span class="p">(</span><span class="n">functools</span><span class="o">.</span><span class="n">partial</span><span class="p">(</span><span class="n">func</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">))</span>
<span class="c1"># ...</span>
<span class="c1"># later</span>
<span class="n">timer</span><span class="o">.</span><span class="n">remove_callback</span><span class="p">(</span><span class="n">cb</span><span class="p">)</span>
</pre></div>
</div>
<p><a class="reference internal" href="../backend_bases_api.html#matplotlib.backend_bases.TimerBase.add_callback" title="matplotlib.backend_bases.TimerBase.add_callback"><code class="xref py py-obj docutils literal notranslate"><span class="pre">TimerBase.add_callback</span></code></a> was modified to return <em>func</em> to
simplify the above usage (previously it returned None); this also
allows using it as a decorator.</p>
<p>The new API is modelled after <a class="reference external" href="https://docs.python.org/3/library/atexit.html#atexit.register" title="(in Python v3.11)"><code class="xref py py-obj docutils literal notranslate"><span class="pre">atexit.register</span></code></a> / <a class="reference external" href="https://docs.python.org/3/library/atexit.html#atexit.unregister" title="(in Python v3.11)"><code class="xref py py-obj docutils literal notranslate"><span class="pre">atexit.unregister</span></code></a>.</p>
</section>
<section id="stemcontainer-performance-increase">
<h3><a class="reference internal" href="../container_api.html#matplotlib.container.StemContainer" title="matplotlib.container.StemContainer"><code class="xref py py-obj docutils literal notranslate"><span class="pre">StemContainer</span></code></a> performance increase<a class="headerlink" href="#stemcontainer-performance-increase" title="Permalink to this heading">#</a></h3>
<p><a class="reference internal" href="../container_api.html#matplotlib.container.StemContainer" title="matplotlib.container.StemContainer"><code class="xref py py-obj docutils literal notranslate"><span class="pre">StemContainer</span></code></a> objects can now store a
<a class="reference internal" href="../collections_api.html#matplotlib.collections.LineCollection" title="matplotlib.collections.LineCollection"><code class="xref py py-obj docutils literal notranslate"><span class="pre">LineCollection</span></code></a> object instead of a list of
<a class="reference internal" href="../_as_gen/matplotlib.lines.Line2D.html#matplotlib.lines.Line2D" title="matplotlib.lines.Line2D"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Line2D</span></code></a> objects for stem lines plotted using
<a class="reference internal" href="../_as_gen/matplotlib.axes.Axes.stem.html#matplotlib.axes.Axes.stem" title="matplotlib.axes.Axes.stem"><code class="xref py py-obj docutils literal notranslate"><span class="pre">stem</span></code></a>. This gives a very large performance boost to displaying
and moving <a class="reference internal" href="../_as_gen/matplotlib.axes.Axes.stem.html#matplotlib.axes.Axes.stem" title="matplotlib.axes.Axes.stem"><code class="xref py py-obj docutils literal notranslate"><span class="pre">stem</span></code></a> plots.</p>
<p>This will become the default behaviour in Matplotlib 3.3. To use it
now, the <em>use_line_collection</em> keyword argument to <a class="reference internal" href="../_as_gen/matplotlib.axes.Axes.stem.html#matplotlib.axes.Axes.stem" title="matplotlib.axes.Axes.stem"><code class="xref py py-obj docutils literal notranslate"><span class="pre">stem</span></code></a> can
be set to <a class="reference external" href="https://docs.python.org/3/library/constants.html#True" title="(in Python v3.11)"><code class="xref py py-obj docutils literal notranslate"><span class="pre">True</span></code></a></p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">ax</span><span class="o">.</span><span class="n">stem</span><span class="p">(</span><span class="o">...</span><span class="p">,</span> <span class="n">use_line_collection</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
</pre></div>
</div>
<p>Individual line segments can be extracted from the
<a class="reference internal" href="../collections_api.html#matplotlib.collections.LineCollection" title="matplotlib.collections.LineCollection"><code class="xref py py-obj docutils literal notranslate"><span class="pre">LineCollection</span></code></a> using
<a class="reference internal" href="../collections_api.html#matplotlib.collections.LineCollection.get_segments" title="matplotlib.collections.LineCollection.get_segments"><code class="xref py py-obj docutils literal notranslate"><span class="pre">get_segments()</span></code></a>. See the
<a class="reference internal" href="../collections_api.html#matplotlib.collections.LineCollection" title="matplotlib.collections.LineCollection"><code class="xref py py-obj docutils literal notranslate"><span class="pre">LineCollection</span></code></a> documentation for other methods to
retrieve the collection properties.</p>
</section>
<section id="colorbarbase-inheritance">
<h3><a class="reference internal" href="../colorbar_api.html#matplotlib.colorbar.ColorbarBase" title="matplotlib.colorbar.ColorbarBase"><code class="xref py py-obj docutils literal notranslate"><span class="pre">ColorbarBase</span></code></a> inheritance<a class="headerlink" href="#colorbarbase-inheritance" title="Permalink to this heading">#</a></h3>
<p><a class="reference internal" href="../colorbar_api.html#matplotlib.colorbar.ColorbarBase" title="matplotlib.colorbar.ColorbarBase"><code class="xref py py-obj docutils literal notranslate"><span class="pre">matplotlib.colorbar.ColorbarBase</span></code></a> is no longer a subclass of
<a class="reference internal" href="../cm_api.html#matplotlib.cm.ScalarMappable" title="matplotlib.cm.ScalarMappable"><code class="xref py py-obj docutils literal notranslate"><span class="pre">cm.ScalarMappable</span></code></a>. This inheritance lead to a confusing situation
where the <a class="reference internal" href="../cm_api.html#matplotlib.cm.ScalarMappable" title="matplotlib.cm.ScalarMappable"><code class="xref py py-obj docutils literal notranslate"><span class="pre">cm.ScalarMappable</span></code></a> passed to <a class="reference internal" href="../colorbar_api.html#matplotlib.colorbar.Colorbar" title="matplotlib.colorbar.Colorbar"><code class="xref py py-obj docutils literal notranslate"><span class="pre">matplotlib.colorbar.Colorbar</span></code></a>
(<a class="reference internal" href="../figure_api.html#matplotlib.figure.Figure.colorbar" title="matplotlib.figure.Figure.colorbar"><code class="xref py py-obj docutils literal notranslate"><span class="pre">colorbar</span></code></a>) had a <code class="docutils literal notranslate"><span class="pre">set_norm</span></code> method, as did the colorbar.
The colorbar is now purely a follower to the <a class="reference internal" href="../cm_api.html#matplotlib.cm.ScalarMappable" title="matplotlib.cm.ScalarMappable"><code class="xref py py-obj docutils literal notranslate"><span class="pre">ScalarMappable</span></code></a> norm and
colormap, and the old inherited methods
<code class="docutils literal notranslate"><span class="pre">matplotlib.colorbar.ColorbarBase.set_norm</span></code>,
<code class="docutils literal notranslate"><span class="pre">matplotlib.colorbar.ColorbarBase.set_cmap</span></code>,
<code class="docutils literal notranslate"><span class="pre">matplotlib.colorbar.ColorbarBase.set_clim</span></code> are deprecated, as are
the getter versions of those calls. To set the norm associated with a
colorbar do <code class="docutils literal notranslate"><span class="pre">colorbar.mappable.set_norm()</span></code> etc.</p>
</section>
<section id="freetype-and-libpng-search-paths">
<h3>FreeType and libpng search paths<a class="headerlink" href="#freetype-and-libpng-search-paths" title="Permalink to this heading">#</a></h3>
<p>The <code class="docutils literal notranslate"><span class="pre">MPLBASEDIRLIST</span></code> environment variables and <code class="docutils literal notranslate"><span class="pre">basedirlist</span></code> entry in
<code class="docutils literal notranslate"><span class="pre">setup.cfg</span></code> have no effect anymore. Instead, if building in situations where
FreeType or libpng are not in the compiler or linker's default path, set the
standard environment variables <code class="docutils literal notranslate"><span class="pre">CFLAGS</span></code>/<code class="docutils literal notranslate"><span class="pre">LDFLAGS</span></code> on Linux or OSX, or
<code class="docutils literal notranslate"><span class="pre">CL</span></code>/<code class="docutils literal notranslate"><span class="pre">LINK</span></code> on Windows, to indicate the relevant paths.</p>
<p>See details in <a class="reference internal" href="../../users/installing/index.html"><span class="doc">Installation</span></a>.</p>
</section>
<section id="setting-artist-properties-twice-or-more-in-the-same-call">
<h3>Setting artist properties twice or more in the same call<a class="headerlink" href="#setting-artist-properties-twice-or-more-in-the-same-call" title="Permalink to this heading">#</a></h3>
<p>Setting the same artist property multiple time via aliases is deprecated.
Previously, code such as</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">plt</span><span class="o">.</span><span class="n">plot</span><span class="p">([</span><span class="mi">0</span><span class="p">,</span> <span class="mi">1</span><span class="p">],</span> <span class="n">c</span><span class="o">=</span><span class="s2">"red"</span><span class="p">,</span> <span class="n">color</span><span class="o">=</span><span class="s2">"blue"</span><span class="p">)</span>
</pre></div>
</div>
<p>would emit a warning indicating that <code class="docutils literal notranslate"><span class="pre">c</span></code> and <code class="docutils literal notranslate"><span class="pre">color</span></code> are aliases
of one another, and only keep the <code class="docutils literal notranslate"><span class="pre">color</span></code> kwarg. This behavior has
been deprecated; in a future version, this will raise a TypeError,
similar to Python's behavior when a keyword argument is passed twice</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">plt</span><span class="o">.</span><span class="n">plot</span><span class="p">([</span><span class="mi">0</span><span class="p">,</span> <span class="mi">1</span><span class="p">],</span> <span class="n">c</span><span class="o">=</span><span class="s2">"red"</span><span class="p">,</span> <span class="n">c</span><span class="o">=</span><span class="s2">"blue"</span><span class="p">)</span>
</pre></div>
</div>
<p>This warning is raised by <a class="reference internal" href="../cbook_api.html#matplotlib.cbook.normalize_kwargs" title="matplotlib.cbook.normalize_kwargs"><code class="xref py py-obj docutils literal notranslate"><span class="pre">normalize_kwargs</span></code></a>.</p>
</section>
<section id="path-code-types">
<h3>Path code types<a class="headerlink" href="#path-code-types" title="Permalink to this heading">#</a></h3>
<p>Path code types like <code class="docutils literal notranslate"><span class="pre">Path.MOVETO</span></code> are now <code class="docutils literal notranslate"><span class="pre">np.uint8</span></code> instead of <code class="docutils literal notranslate"><span class="pre">int</span></code>
<code class="docutils literal notranslate"><span class="pre">Path.STOP</span></code>, <code class="docutils literal notranslate"><span class="pre">Path.MOVETO</span></code>, <code class="docutils literal notranslate"><span class="pre">Path.LINETO</span></code>, <code class="docutils literal notranslate"><span class="pre">Path.CURVE3</span></code>,
<code class="docutils literal notranslate"><span class="pre">Path.CURVE4</span></code> and <code class="docutils literal notranslate"><span class="pre">Path.CLOSEPOLY</span></code> are now of the type <code class="docutils literal notranslate"><span class="pre">Path.code_type</span></code>
(<code class="docutils literal notranslate"><span class="pre">np.uint8</span></code> by default) instead of plain <code class="docutils literal notranslate"><span class="pre">int</span></code>. This makes their type
match the array value type of the <code class="docutils literal notranslate"><span class="pre">Path.codes</span></code> array.</p>
</section>
<section id="latex-code-in-matplotlibrc-file">
<h3>LaTeX code in matplotlibrc file<a class="headerlink" href="#latex-code-in-matplotlibrc-file" title="Permalink to this heading">#</a></h3>
<p>Previously, the rc file keys <code class="docutils literal notranslate"><span class="pre">pgf.preamble</span></code> and <code class="docutils literal notranslate"><span class="pre">text.latex.preamble</span></code> were
parsed using commas as separators. This would break valid LaTeX code, such as:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span>\<span class="n">usepackage</span><span class="p">[</span><span class="n">protrusion</span><span class="o">=</span><span class="n">true</span><span class="p">,</span> <span class="n">expansion</span><span class="o">=</span><span class="n">false</span><span class="p">]{</span><span class="n">microtype</span><span class="p">}</span>
</pre></div>
</div>
<p>The parsing has been modified to pass the complete line to the LaTeX system,
keeping all commas. Passing a list of strings from within a Python script still
works as it used to. Passing a list containing non-strings now fails, instead
of coercing the results to strings.</p>
</section>
<section id="axes-spy">
<h3><a class="reference internal" href="../_as_gen/matplotlib.axes.Axes.spy.html#matplotlib.axes.Axes.spy" title="matplotlib.axes.Axes.spy"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Axes.spy</span></code></a><a class="headerlink" href="#axes-spy" title="Permalink to this heading">#</a></h3>
<p>The method <a class="reference internal" href="../_as_gen/matplotlib.axes.Axes.spy.html#matplotlib.axes.Axes.spy" title="matplotlib.axes.Axes.spy"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Axes.spy</span></code></a> now raises a <a class="reference external" href="https://docs.python.org/3/library/exceptions.html#TypeError" title="(in Python v3.11)"><code class="xref py py-obj docutils literal notranslate"><span class="pre">TypeError</span></code></a> for the keyword
arguments <em>interpolation</em> and <em>linestyle</em> instead of silently ignoring
them.</p>
<p>Furthermore, <a class="reference internal" href="../_as_gen/matplotlib.axes.Axes.spy.html#matplotlib.axes.Axes.spy" title="matplotlib.axes.Axes.spy"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Axes.spy</span></code></a> spy does now allow for an <em>extent</em> argument
(was silently ignored so far).</p>
<p>A bug with <code class="docutils literal notranslate"><span class="pre">Axes.spy(...,</span> <span class="pre">origin='lower')</span></code> is fixed. Previously this
flipped the data but not the y-axis resulting in a mismatch between
axes labels and actual data indices. Now, <em>origin='lower'</em> flips both
the data and the y-axis labels.</p>
</section>
<section id="boxplot-tick-methods">
<h3>Boxplot tick methods<a class="headerlink" href="#boxplot-tick-methods" title="Permalink to this heading">#</a></h3>
<p>The <em>manage_xticks</em> parameter of <a class="reference internal" href="../_as_gen/matplotlib.axes.Axes.boxplot.html#matplotlib.axes.Axes.boxplot" title="matplotlib.axes.Axes.boxplot"><code class="xref py py-obj docutils literal notranslate"><span class="pre">boxplot</span></code></a> and <a class="reference internal" href="../_as_gen/matplotlib.axes.Axes.bxp.html#matplotlib.axes.Axes.bxp" title="matplotlib.axes.Axes.bxp"><code class="xref py py-obj docutils literal notranslate"><span class="pre">bxp</span></code></a> has
been renamed (with a deprecation period) to <em>manage_ticks</em>, to take
into account the fact that it manages either x or y ticks depending on
the <em>vert</em> parameter.</p>
<p>When <code class="docutils literal notranslate"><span class="pre">manage_ticks=True</span></code> (the default), these methods now attempt to
take previously drawn boxplots into account when setting the axis
limits, ticks, and tick labels.</p>
</section>
<section id="mouseevents">
<h3>MouseEvents<a class="headerlink" href="#mouseevents" title="Permalink to this heading">#</a></h3>
<p>MouseEvents now include the event name in their <code class="docutils literal notranslate"><span class="pre">str()</span></code>.
Previously they contained the prefix "MPL MouseEvent".</p>
</section>
<section id="rgba-buffer-return-type">
<h3>RGBA buffer return type<a class="headerlink" href="#rgba-buffer-return-type" title="Permalink to this heading">#</a></h3>
<p><a class="reference internal" href="../backend_agg_api.html#matplotlib.backends.backend_agg.FigureCanvasAgg.buffer_rgba" title="matplotlib.backends.backend_agg.FigureCanvasAgg.buffer_rgba"><code class="xref py py-obj docutils literal notranslate"><span class="pre">FigureCanvasAgg.buffer_rgba</span></code></a> and <a class="reference internal" href="../backend_agg_api.html#matplotlib.backends.backend_agg.RendererAgg.buffer_rgba" title="matplotlib.backends.backend_agg.RendererAgg.buffer_rgba"><code class="xref py py-obj docutils literal notranslate"><span class="pre">RendererAgg.buffer_rgba</span></code></a> now
return a memoryview The <code class="docutils literal notranslate"><span class="pre">buffer_rgba</span></code> method now allows direct
access to the renderer's underlying buffer (as a <code class="docutils literal notranslate"><span class="pre">(m,</span> <span class="pre">n,</span> <span class="pre">4)</span></code>-shape
memoryview) rather than copying the data to a new bytestring. This is
consistent with the behavior on Py2, where a buffer object was
returned.</p>
</section>
<section id="matplotlib-font-manager-win32installedfonts-return-type">
<h3><code class="docutils literal notranslate"><span class="pre">matplotlib.font_manager.win32InstalledFonts</span></code> return type<a class="headerlink" href="#matplotlib-font-manager-win32installedfonts-return-type" title="Permalink to this heading">#</a></h3>
<p><code class="docutils literal notranslate"><span class="pre">matplotlib.font_manager.win32InstalledFonts</span></code> returns an empty list instead
of None if no fonts are found.</p>
</section>
<section id="axes-fmt-xdata-and-axes-fmt-ydata-error-handling">
<h3><code class="docutils literal notranslate"><span class="pre">Axes.fmt_xdata</span></code> and <code class="docutils literal notranslate"><span class="pre">Axes.fmt_ydata</span></code> error handling<a class="headerlink" href="#axes-fmt-xdata-and-axes-fmt-ydata-error-handling" title="Permalink to this heading">#</a></h3>
<p>Previously, if the user provided a <code class="docutils literal notranslate"><span class="pre">Axes.fmt_xdata</span></code> or
<code class="docutils literal notranslate"><span class="pre">Axes.fmt_ydata</span></code> function that raised a <a class="reference external" href="https://docs.python.org/3/library/exceptions.html#TypeError" title="(in Python v3.11)"><code class="xref py py-obj docutils literal notranslate"><span class="pre">TypeError</span></code></a> (or set them to a
non-callable), the exception would be silently ignored and the default
formatter be used instead. This is no longer the case; the exception
is now propagated out.</p>
</section>
<section id="deprecation-of-redundant-tick-attributes">
<h3>Deprecation of redundant <a class="reference internal" href="../axis_api.html#matplotlib.axis.Tick" title="matplotlib.axis.Tick"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Tick</span></code></a> attributes<a class="headerlink" href="#deprecation-of-redundant-tick-attributes" title="Permalink to this heading">#</a></h3>
<p>The <code class="docutils literal notranslate"><span class="pre">gridOn</span></code>, <code class="docutils literal notranslate"><span class="pre">tick1On</span></code>, <code class="docutils literal notranslate"><span class="pre">tick2On</span></code>, <code class="docutils literal notranslate"><span class="pre">label1On</span></code>, and <code class="docutils literal notranslate"><span class="pre">label2On</span></code>