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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="Link 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="../pylab.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>
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<section id="behavior-changes">
<h2><a class="toc-backref" href="#id2" role="doc-backlink">Behavior changes</a><a class="headerlink" href="#behavior-changes" title="Link to this heading">#</a></h2>
<section id="matplotlib-use">
<h3>Matplotlib.use<a class="headerlink" href="#matplotlib-use" title="Link 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 v3.12)"><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="Link 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="Link 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="Link 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="Link 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="../_as_gen/matplotlib.figure.Figure.add_subplot.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="Link to this heading">#</a></h3>
<p>Calling <a class="reference internal" href="../_as_gen/matplotlib.figure.Figure.add_subplot.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="Link 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="../../users/explain/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="../../users/explain/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="Link 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="Link to this heading">#</a></h3>
<p>Previously, if <code class="docutils literal notranslate"><a class="reference internal" href="../../users/explain/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="Link 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="Link 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="Link 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="Link 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="Link 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="Link 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="Link 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 v3.12)"><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="Link to this heading">#</a></h3>
<p>The HTMLWriter constructor is more strict: it no longer normalizes unknown