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<div class="section" id="patheffects">
<h1>patheffects<a class="headerlink" href="#patheffects" title="Permalink to this headline">¶</a></h1>
<div class="section" id="module-matplotlib.patheffects">
<span id="matplotlib-patheffects"></span><h2><a class="reference internal" href="../tutorials/advanced/patheffects_guide.html#module-matplotlib.patheffects" title="matplotlib.patheffects"><code class="xref py py-mod docutils literal"><span class="pre">matplotlib.patheffects</span></code></a><a class="headerlink" href="#module-matplotlib.patheffects" title="Permalink to this headline">¶</a></h2>
<p>Defines classes for path effects. The path effects are supported in
<a class="reference internal" href="text_api.html#matplotlib.text.Text" title="matplotlib.text.Text"><code class="xref py py-class docutils literal"><span class="pre">Text</span></code></a>, <a class="reference internal" href="_as_gen/matplotlib.lines.Line2D.html#matplotlib.lines.Line2D" title="matplotlib.lines.Line2D"><code class="xref py py-class docutils literal"><span class="pre">Line2D</span></code></a>
and <a class="reference internal" href="_as_gen/matplotlib.patches.Patch.html#matplotlib.patches.Patch" title="matplotlib.patches.Patch"><code class="xref py py-class docutils literal"><span class="pre">Patch</span></code></a>.</p>
<dl class="class">
<dt id="matplotlib.patheffects.AbstractPathEffect">
<em class="property">class </em><code class="descclassname">matplotlib.patheffects.</code><code class="descname">AbstractPathEffect</code><span class="sig-paren">(</span><em>offset=(0.0</em>, <em>0.0)</em><span class="sig-paren">)</span><a class="headerlink" href="#matplotlib.patheffects.AbstractPathEffect" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <a class="reference external" href="https://docs.python.org/2/library/functions.html#object" title="(in Python v2.7)"><code class="xref py py-class docutils literal"><span class="pre">object</span></code></a></p>
<p>A base class for path effects.</p>
<p>Subclasses should override the <code class="docutils literal"><span class="pre">draw_path</span></code> method to add effect
functionality.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><p class="first"><strong>offset</strong> : pair of floats</p>
<blockquote class="last">
<div><p>The offset to apply to the path, measured in points.</p>
</div></blockquote>
</td>
</tr>
</tbody>
</table>
<dl class="method">
<dt id="matplotlib.patheffects.AbstractPathEffect.draw_path">
<code class="descname">draw_path</code><span class="sig-paren">(</span><em>renderer</em>, <em>gc</em>, <em>tpath</em>, <em>affine</em>, <em>rgbFace=None</em><span class="sig-paren">)</span><a class="headerlink" href="#matplotlib.patheffects.AbstractPathEffect.draw_path" title="Permalink to this definition">¶</a></dt>
<dd><p>Derived should override this method. The arguments are the same
as <a class="reference internal" href="backend_bases_api.html#matplotlib.backend_bases.RendererBase.draw_path" title="matplotlib.backend_bases.RendererBase.draw_path"><code class="xref py py-meth docutils literal"><span class="pre">matplotlib.backend_bases.RendererBase.draw_path()</span></code></a>
except the first argument is a renderer.</p>
</dd></dl>
</dd></dl>
<dl class="class">
<dt id="matplotlib.patheffects.Normal">
<em class="property">class </em><code class="descclassname">matplotlib.patheffects.</code><code class="descname">Normal</code><span class="sig-paren">(</span><em>offset=(0.0</em>, <em>0.0)</em><span class="sig-paren">)</span><a class="headerlink" href="#matplotlib.patheffects.Normal" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <a class="reference internal" href="#matplotlib.patheffects.AbstractPathEffect" title="matplotlib.patheffects.AbstractPathEffect"><code class="xref py py-class docutils literal"><span class="pre">matplotlib.patheffects.AbstractPathEffect</span></code></a></p>
<p>The “identity” PathEffect.</p>
<p>The Normal PathEffect’s sole purpose is to draw the original artist with
no special path effect.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><p class="first"><strong>offset</strong> : pair of floats</p>
<blockquote class="last">
<div><p>The offset to apply to the path, measured in points.</p>
</div></blockquote>
</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="class">
<dt id="matplotlib.patheffects.PathEffectRenderer">
<em class="property">class </em><code class="descclassname">matplotlib.patheffects.</code><code class="descname">PathEffectRenderer</code><span class="sig-paren">(</span><em>path_effects</em>, <em>renderer</em><span class="sig-paren">)</span><a class="headerlink" href="#matplotlib.patheffects.PathEffectRenderer" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <a class="reference internal" href="backend_bases_api.html#matplotlib.backend_bases.RendererBase" title="matplotlib.backend_bases.RendererBase"><code class="xref py py-class docutils literal"><span class="pre">matplotlib.backend_bases.RendererBase</span></code></a></p>
<p>Implements a Renderer which contains another renderer.</p>
<p>This proxy then intercepts draw calls, calling the appropriate
<a class="reference internal" href="#matplotlib.patheffects.AbstractPathEffect" title="matplotlib.patheffects.AbstractPathEffect"><code class="xref py py-class docutils literal"><span class="pre">AbstractPathEffect</span></code></a> draw method.</p>
<div class="admonition note">
<p class="first admonition-title">Note</p>
<p class="last">Not all methods have been overridden on this RendererBase subclass.
It may be necessary to add further methods to extend the PathEffects
capabilities further.</p>
</div>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><p class="first"><strong>path_effects</strong> : iterable of <a class="reference internal" href="#matplotlib.patheffects.AbstractPathEffect" title="matplotlib.patheffects.AbstractPathEffect"><code class="xref py py-class docutils literal"><span class="pre">AbstractPathEffect</span></code></a></p>
<blockquote>
<div><p>The path effects which this renderer represents.</p>
</div></blockquote>
<p class="last"><strong>renderer</strong> : <a class="reference internal" href="backend_bases_api.html#matplotlib.backend_bases.RendererBase" title="matplotlib.backend_bases.RendererBase"><code class="xref py py-class docutils literal"><span class="pre">matplotlib.backend_bases.RendererBase</span></code></a> instance</p>
</td>
</tr>
</tbody>
</table>
<dl class="method">
<dt id="matplotlib.patheffects.PathEffectRenderer.copy_with_path_effect">
<code class="descname">copy_with_path_effect</code><span class="sig-paren">(</span><em>path_effects</em><span class="sig-paren">)</span><a class="headerlink" href="#matplotlib.patheffects.PathEffectRenderer.copy_with_path_effect" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
<dl class="method">
<dt id="matplotlib.patheffects.PathEffectRenderer.draw_markers">
<code class="descname">draw_markers</code><span class="sig-paren">(</span><em>gc</em>, <em>marker_path</em>, <em>marker_trans</em>, <em>path</em>, <em>*args</em>, <em>**kwargs</em><span class="sig-paren">)</span><a class="headerlink" href="#matplotlib.patheffects.PathEffectRenderer.draw_markers" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
<dl class="method">
<dt id="matplotlib.patheffects.PathEffectRenderer.draw_path">
<code class="descname">draw_path</code><span class="sig-paren">(</span><em>gc</em>, <em>tpath</em>, <em>affine</em>, <em>rgbFace=None</em><span class="sig-paren">)</span><a class="headerlink" href="#matplotlib.patheffects.PathEffectRenderer.draw_path" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
<dl class="method">
<dt id="matplotlib.patheffects.PathEffectRenderer.draw_path_collection">
<code class="descname">draw_path_collection</code><span class="sig-paren">(</span><em>gc</em>, <em>master_transform</em>, <em>paths</em>, <em>*args</em>, <em>**kwargs</em><span class="sig-paren">)</span><a class="headerlink" href="#matplotlib.patheffects.PathEffectRenderer.draw_path_collection" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
<dl class="method">
<dt id="matplotlib.patheffects.PathEffectRenderer.new_gc">
<code class="descname">new_gc</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#matplotlib.patheffects.PathEffectRenderer.new_gc" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
<dl class="method">
<dt id="matplotlib.patheffects.PathEffectRenderer.points_to_pixels">
<code class="descname">points_to_pixels</code><span class="sig-paren">(</span><em>points</em><span class="sig-paren">)</span><a class="headerlink" href="#matplotlib.patheffects.PathEffectRenderer.points_to_pixels" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
</dd></dl>
<dl class="class">
<dt id="matplotlib.patheffects.PathPatchEffect">
<em class="property">class </em><code class="descclassname">matplotlib.patheffects.</code><code class="descname">PathPatchEffect</code><span class="sig-paren">(</span><em>offset=(0</em>, <em>0)</em>, <em>**kwargs</em><span class="sig-paren">)</span><a class="headerlink" href="#matplotlib.patheffects.PathPatchEffect" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <a class="reference internal" href="#matplotlib.patheffects.AbstractPathEffect" title="matplotlib.patheffects.AbstractPathEffect"><code class="xref py py-class docutils literal"><span class="pre">matplotlib.patheffects.AbstractPathEffect</span></code></a></p>
<p>Draws a <a class="reference internal" href="_as_gen/matplotlib.patches.PathPatch.html#matplotlib.patches.PathPatch" title="matplotlib.patches.PathPatch"><code class="xref py py-class docutils literal"><span class="pre">PathPatch</span></code></a> instance whose Path
comes from the original PathEffect artist.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><p class="first"><strong>offset</strong> : pair of floats</p>
<blockquote>
<div><p>The offset to apply to the path, in points.</p>
</div></blockquote>
<p><strong>**kwargs :</strong></p>
<blockquote class="last">
<div><p>All keyword arguments are passed through to the
<a class="reference internal" href="_as_gen/matplotlib.patches.PathPatch.html#matplotlib.patches.PathPatch" title="matplotlib.patches.PathPatch"><code class="xref py py-class docutils literal"><span class="pre">PathPatch</span></code></a> constructor. The
properties which cannot be overridden are “path”, “clip_box”
“transform” and “clip_path”.</p>
</div></blockquote>
</td>
</tr>
</tbody>
</table>
<dl class="method">
<dt id="matplotlib.patheffects.PathPatchEffect.draw_path">
<code class="descname">draw_path</code><span class="sig-paren">(</span><em>renderer</em>, <em>gc</em>, <em>tpath</em>, <em>affine</em>, <em>rgbFace</em><span class="sig-paren">)</span><a class="headerlink" href="#matplotlib.patheffects.PathPatchEffect.draw_path" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
</dd></dl>
<dl class="class">
<dt id="matplotlib.patheffects.SimpleLineShadow">
<em class="property">class </em><code class="descclassname">matplotlib.patheffects.</code><code class="descname">SimpleLineShadow</code><span class="sig-paren">(</span><em>offset=(2</em>, <em>-2)</em>, <em>shadow_color='k'</em>, <em>alpha=0.3</em>, <em>rho=0.3</em>, <em>**kwargs</em><span class="sig-paren">)</span><a class="headerlink" href="#matplotlib.patheffects.SimpleLineShadow" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <a class="reference internal" href="#matplotlib.patheffects.AbstractPathEffect" title="matplotlib.patheffects.AbstractPathEffect"><code class="xref py py-class docutils literal"><span class="pre">matplotlib.patheffects.AbstractPathEffect</span></code></a></p>
<p>A simple shadow via a line.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><p class="first"><strong>offset</strong> : pair of floats</p>
<blockquote>
<div><p>The offset to apply to the path, in points.</p>
</div></blockquote>
<p><strong>shadow_color</strong> : color</p>
<blockquote>
<div><p>The shadow color. Default is black.
A value of <code class="docutils literal"><span class="pre">None</span></code> takes the original artist’s color
with a scale factor of <code class="xref py py-obj docutils literal"><span class="pre">rho</span></code>.</p>
</div></blockquote>
<p><strong>alpha</strong> : float</p>
<blockquote>
<div><p>The alpha transparency of the created shadow patch.
Default is 0.3.</p>
</div></blockquote>
<p><strong>rho</strong> : float</p>
<blockquote>
<div><p>A scale factor to apply to the rgbFace color if <code class="xref py py-obj docutils literal"><span class="pre">shadow_rgbFace</span></code>
is <code class="docutils literal"><span class="pre">None</span></code>. Default is 0.3.</p>
</div></blockquote>
<p><strong>**kwargs</strong></p>
<blockquote class="last">
<div><p>Extra keywords are stored and passed through to
<code class="xref py py-meth docutils literal"><span class="pre">AbstractPathEffect._update_gc()</span></code>.</p>
</div></blockquote>
</td>
</tr>
</tbody>
</table>
<dl class="method">
<dt id="matplotlib.patheffects.SimpleLineShadow.draw_path">
<code class="descname">draw_path</code><span class="sig-paren">(</span><em>renderer</em>, <em>gc</em>, <em>tpath</em>, <em>affine</em>, <em>rgbFace</em><span class="sig-paren">)</span><a class="headerlink" href="#matplotlib.patheffects.SimpleLineShadow.draw_path" title="Permalink to this definition">¶</a></dt>
<dd><p>Overrides the standard draw_path to add the shadow offset and
necessary color changes for the shadow.</p>
</dd></dl>
</dd></dl>
<dl class="class">
<dt id="matplotlib.patheffects.SimplePatchShadow">
<em class="property">class </em><code class="descclassname">matplotlib.patheffects.</code><code class="descname">SimplePatchShadow</code><span class="sig-paren">(</span><em>offset=(2</em>, <em>-2)</em>, <em>shadow_rgbFace=None</em>, <em>alpha=None</em>, <em>rho=0.3</em>, <em>**kwargs</em><span class="sig-paren">)</span><a class="headerlink" href="#matplotlib.patheffects.SimplePatchShadow" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <a class="reference internal" href="#matplotlib.patheffects.AbstractPathEffect" title="matplotlib.patheffects.AbstractPathEffect"><code class="xref py py-class docutils literal"><span class="pre">matplotlib.patheffects.AbstractPathEffect</span></code></a></p>
<p>A simple shadow via a filled patch.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><p class="first"><strong>offset</strong> : pair of floats</p>
<blockquote>
<div><p>The offset of the shadow in points.</p>
</div></blockquote>
<p><strong>shadow_rgbFace</strong> : color</p>
<blockquote>
<div><p>The shadow color.</p>
</div></blockquote>
<p><strong>alpha</strong> : float</p>
<blockquote>
<div><p>The alpha transparency of the created shadow patch.
Default is 0.3.
<a class="reference external" href="http://matplotlib.1069221.n5.nabble.com/path-effects-question-td27630.html">http://matplotlib.1069221.n5.nabble.com/path-effects-question-td27630.html</a></p>
</div></blockquote>
<p><strong>rho</strong> : float</p>
<blockquote>
<div><p>A scale factor to apply to the rgbFace color if <code class="xref py py-obj docutils literal"><span class="pre">shadow_rgbFace</span></code>
is not specified. Default is 0.3.</p>
</div></blockquote>
<p><strong>**kwargs</strong></p>
<blockquote class="last">
<div><p>Extra keywords are stored and passed through to
<code class="xref py py-meth docutils literal"><span class="pre">AbstractPathEffect._update_gc()</span></code>.</p>
</div></blockquote>
</td>
</tr>
</tbody>
</table>
<dl class="method">
<dt id="matplotlib.patheffects.SimplePatchShadow.draw_path">
<code class="descname">draw_path</code><span class="sig-paren">(</span><em>renderer</em>, <em>gc</em>, <em>tpath</em>, <em>affine</em>, <em>rgbFace</em><span class="sig-paren">)</span><a class="headerlink" href="#matplotlib.patheffects.SimplePatchShadow.draw_path" title="Permalink to this definition">¶</a></dt>
<dd><p>Overrides the standard draw_path to add the shadow offset and
necessary color changes for the shadow.</p>
</dd></dl>
</dd></dl>
<dl class="class">
<dt id="matplotlib.patheffects.Stroke">
<em class="property">class </em><code class="descclassname">matplotlib.patheffects.</code><code class="descname">Stroke</code><span class="sig-paren">(</span><em>offset=(0</em>, <em>0)</em>, <em>**kwargs</em><span class="sig-paren">)</span><a class="headerlink" href="#matplotlib.patheffects.Stroke" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <a class="reference internal" href="#matplotlib.patheffects.AbstractPathEffect" title="matplotlib.patheffects.AbstractPathEffect"><code class="xref py py-class docutils literal"><span class="pre">matplotlib.patheffects.AbstractPathEffect</span></code></a></p>
<p>A line based PathEffect which re-draws a stroke.</p>
<p>The path will be stroked with its gc updated with the given
keyword arguments, i.e., the keyword arguments should be valid
gc parameter values.</p>
<dl class="method">
<dt id="matplotlib.patheffects.Stroke.draw_path">
<code class="descname">draw_path</code><span class="sig-paren">(</span><em>renderer</em>, <em>gc</em>, <em>tpath</em>, <em>affine</em>, <em>rgbFace</em><span class="sig-paren">)</span><a class="headerlink" href="#matplotlib.patheffects.Stroke.draw_path" title="Permalink to this definition">¶</a></dt>
<dd><p>draw the path with updated gc.</p>
</dd></dl>
</dd></dl>
<dl class="class">
<dt id="matplotlib.patheffects.withSimplePatchShadow">
<em class="property">class </em><code class="descclassname">matplotlib.patheffects.</code><code class="descname">withSimplePatchShadow</code><span class="sig-paren">(</span><em>offset=(2</em>, <em>-2)</em>, <em>shadow_rgbFace=None</em>, <em>alpha=None</em>, <em>rho=0.3</em>, <em>**kwargs</em><span class="sig-paren">)</span><a class="headerlink" href="#matplotlib.patheffects.withSimplePatchShadow" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <a class="reference internal" href="#matplotlib.patheffects.SimplePatchShadow" title="matplotlib.patheffects.SimplePatchShadow"><code class="xref py py-class docutils literal"><span class="pre">matplotlib.patheffects.SimplePatchShadow</span></code></a></p>
<p>Adds a simple <a class="reference internal" href="#matplotlib.patheffects.SimplePatchShadow" title="matplotlib.patheffects.SimplePatchShadow"><code class="xref py py-class docutils literal"><span class="pre">SimplePatchShadow</span></code></a> and then draws the
original Artist to avoid needing to call <a class="reference internal" href="#matplotlib.patheffects.Normal" title="matplotlib.patheffects.Normal"><code class="xref py py-class docutils literal"><span class="pre">Normal</span></code></a>.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><p class="first"><strong>offset</strong> : pair of floats</p>
<blockquote>
<div><p>The offset of the shadow in points.</p>
</div></blockquote>
<p><strong>shadow_rgbFace</strong> : color</p>
<blockquote>
<div><p>The shadow color.</p>
</div></blockquote>
<p><strong>alpha</strong> : float</p>
<blockquote>
<div><p>The alpha transparency of the created shadow patch.
Default is 0.3.
<a class="reference external" href="http://matplotlib.1069221.n5.nabble.com/path-effects-question-td27630.html">http://matplotlib.1069221.n5.nabble.com/path-effects-question-td27630.html</a></p>
</div></blockquote>
<p><strong>rho</strong> : float</p>
<blockquote>
<div><p>A scale factor to apply to the rgbFace color if <code class="xref py py-obj docutils literal"><span class="pre">shadow_rgbFace</span></code>
is not specified. Default is 0.3.</p>
</div></blockquote>
<p><strong>**kwargs</strong></p>
<blockquote class="last">
<div><p>Extra keywords are stored and passed through to
<code class="xref py py-meth docutils literal"><span class="pre">AbstractPathEffect._update_gc()</span></code>.</p>
</div></blockquote>
</td>
</tr>
</tbody>
</table>
<dl class="method">
<dt id="matplotlib.patheffects.withSimplePatchShadow.draw_path">
<code class="descname">draw_path</code><span class="sig-paren">(</span><em>renderer</em>, <em>gc</em>, <em>tpath</em>, <em>affine</em>, <em>rgbFace</em><span class="sig-paren">)</span><a class="headerlink" href="#matplotlib.patheffects.withSimplePatchShadow.draw_path" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
</dd></dl>
<dl class="class">
<dt id="matplotlib.patheffects.withStroke">
<em class="property">class </em><code class="descclassname">matplotlib.patheffects.</code><code class="descname">withStroke</code><span class="sig-paren">(</span><em>offset=(0</em>, <em>0)</em>, <em>**kwargs</em><span class="sig-paren">)</span><a class="headerlink" href="#matplotlib.patheffects.withStroke" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <a class="reference internal" href="#matplotlib.patheffects.Stroke" title="matplotlib.patheffects.Stroke"><code class="xref py py-class docutils literal"><span class="pre">matplotlib.patheffects.Stroke</span></code></a></p>
<p>Adds a simple <a class="reference internal" href="#matplotlib.patheffects.Stroke" title="matplotlib.patheffects.Stroke"><code class="xref py py-class docutils literal"><span class="pre">Stroke</span></code></a> and then draws the
original Artist to avoid needing to call <a class="reference internal" href="#matplotlib.patheffects.Normal" title="matplotlib.patheffects.Normal"><code class="xref py py-class docutils literal"><span class="pre">Normal</span></code></a>.</p>
<p>The path will be stroked with its gc updated with the given
keyword arguments, i.e., the keyword arguments should be valid
gc parameter values.</p>
<dl class="method">
<dt id="matplotlib.patheffects.withStroke.draw_path">
<code class="descname">draw_path</code><span class="sig-paren">(</span><em>renderer</em>, <em>gc</em>, <em>tpath</em>, <em>affine</em>, <em>rgbFace</em><span class="sig-paren">)</span><a class="headerlink" href="#matplotlib.patheffects.withStroke.draw_path" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
</dd></dl>
</div>
</div>
</div>
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© Copyright 2002 - 2012 John Hunter, Darren Dale, Eric Firing, Michael Droettboom and the Matplotlib development team; 2012 - 2017 The Matplotlib development team.
Last updated on Oct 13, 2017.
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