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<h3><a href="../contents.html">Table Of Contents</a></h3>
<ul>
<li><a class="reference internal" href="#"><code class="docutils literal"><span class="pre">animation</span></code> module</a><ul>
<li><a class="reference internal" href="#animation">Animation</a><ul>
<li><a class="reference internal" href="#funcanimation"><code class="docutils literal"><span class="pre">FuncAnimation</span></code></a><ul>
<li><a class="reference internal" href="#examples">Examples</a></li>
</ul>
</li>
<li><a class="reference internal" href="#artistanimation"><code class="docutils literal"><span class="pre">ArtistAnimation</span></code></a><ul>
<li><a class="reference internal" href="#id1">Examples</a></li>
</ul>
</li>
</ul>
</li>
<li><a class="reference internal" href="#writer-classes">Writer Classes</a><ul>
</ul>
</li>
<li><a class="reference internal" href="#helper-classes">Helper Classes</a><ul>
<li><a class="reference internal" href="#animation-base-classes">Animation Base Classes</a></li>
<li><a class="reference internal" href="#custom-animation-classes">Custom Animation classes</a></li>
<li><a class="reference internal" href="#writer-registry">Writer Registry</a></li>
<li><a class="reference internal" href="#writer-base-classes">Writer Base Classes</a><ul>
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<div class="section" id="module-matplotlib.animation">
<span id="animation-module"></span><h1><code class="docutils literal"><span class="pre">animation</span></code> module<a class="headerlink" href="#module-matplotlib.animation" title="Permalink to this headline">¶</a></h1>
<div class="contents local topic" id="table-of-contents">
<p class="topic-title first">Table of Contents</p>
<ul class="simple">
<li><a class="reference internal" href="#animation" id="id2">Animation</a></li>
<li><a class="reference internal" href="#writer-classes" id="id3">Writer Classes</a></li>
<li><a class="reference internal" href="#helper-classes" id="id4">Helper Classes</a></li>
<li><a class="reference internal" href="#inheritance-diagrams" id="id5">Inheritance Diagrams</a></li>
<li><a class="reference internal" href="#deprecated" id="id6">Deprecated</a></li>
</ul>
</div>
<div class="section" id="animation">
<h2><a class="toc-backref" href="#id2">Animation</a><a class="headerlink" href="#animation" title="Permalink to this headline">¶</a></h2>
<p>The easiest way to make a live animation in matplotlib is to use one of the
<a class="reference internal" href="_as_gen/matplotlib.animation.Animation.html#matplotlib.animation.Animation" title="matplotlib.animation.Animation"><code class="xref py py-obj docutils literal"><span class="pre">Animation</span></code></a> classes.</p>
<table border="1" class="longtable docutils">
<colgroup>
<col width="10%" />
<col width="90%" />
</colgroup>
<tbody valign="top">
<tr class="row-odd"><td><a class="reference internal" href="_as_gen/matplotlib.animation.FuncAnimation.html#matplotlib.animation.FuncAnimation" title="matplotlib.animation.FuncAnimation"><code class="xref py py-obj docutils literal"><span class="pre">FuncAnimation</span></code></a></td>
<td>Makes an animation by repeatedly calling a function <code class="docutils literal"><span class="pre">func</span></code>.</td>
</tr>
<tr class="row-even"><td><a class="reference internal" href="_as_gen/matplotlib.animation.ArtistAnimation.html#matplotlib.animation.ArtistAnimation" title="matplotlib.animation.ArtistAnimation"><code class="xref py py-obj docutils literal"><span class="pre">ArtistAnimation</span></code></a></td>
<td>Animation using a fixed set of <code class="xref py py-obj docutils literal"><span class="pre">Artist</span></code> objects.</td>
</tr>
</tbody>
</table>
<p>In both cases it is critical to keep a reference to the instance
object. The animation is advanced by a timer (typically from the host
GUI framework) which the <a class="reference internal" href="_as_gen/matplotlib.animation.Animation.html#matplotlib.animation.Animation" title="matplotlib.animation.Animation"><code class="xref py py-obj docutils literal"><span class="pre">Animation</span></code></a> object holds the only reference
to. If you do not hold a reference to the <a class="reference internal" href="_as_gen/matplotlib.animation.Animation.html#matplotlib.animation.Animation" title="matplotlib.animation.Animation"><code class="xref py py-obj docutils literal"><span class="pre">Animation</span></code></a> object, it (and
hence the timers), will be garbage collected which will stop the
animation.</p>
<p>To save an animation to disk use</p>
<table border="1" class="longtable docutils">
<colgroup>
<col width="10%" />
<col width="90%" />
</colgroup>
<tbody valign="top">
<tr class="row-odd"><td><a class="reference internal" href="_as_gen/matplotlib.animation.Animation.save.html#matplotlib.animation.Animation.save" title="matplotlib.animation.Animation.save"><code class="xref py py-obj docutils literal"><span class="pre">Animation.save</span></code></a></td>
<td>Saves a movie file by drawing every frame.</td>
</tr>
<tr class="row-even"><td><a class="reference internal" href="_as_gen/matplotlib.animation.Animation.to_html5_video.html#matplotlib.animation.Animation.to_html5_video" title="matplotlib.animation.Animation.to_html5_video"><code class="xref py py-obj docutils literal"><span class="pre">Animation.to_html5_video</span></code></a></td>
<td>Returns animation as an HTML5 video tag.</td>
</tr>
</tbody>
</table>
<p>See <a class="reference internal" href="#ani-writer-classes"><span class="std std-ref">Helper Classes</span></a> below for details about what movie formats are supported.</p>
<div class="section" id="funcanimation">
<h3><code class="docutils literal"><span class="pre">FuncAnimation</span></code><a class="headerlink" href="#funcanimation" title="Permalink to this headline">¶</a></h3>
<p>The inner workings of <a class="reference internal" href="_as_gen/matplotlib.animation.FuncAnimation.html#matplotlib.animation.FuncAnimation" title="matplotlib.animation.FuncAnimation"><code class="xref py py-obj docutils literal"><span class="pre">FuncAnimation</span></code></a> is more-or-less:</p>
<div class="highlight-default"><div class="highlight"><pre><span></span><span class="k">for</span> <span class="n">d</span> <span class="ow">in</span> <span class="n">frames</span><span class="p">:</span>
<span class="n">artists</span> <span class="o">=</span> <span class="n">func</span><span class="p">(</span><span class="n">d</span><span class="p">,</span> <span class="o">*</span><span class="n">fargs</span><span class="p">)</span>
<span class="n">fig</span><span class="o">.</span><span class="n">canvas</span><span class="o">.</span><span class="n">draw_idle</span><span class="p">()</span>
<span class="n">plt</span><span class="o">.</span><span class="n">pause</span><span class="p">(</span><span class="n">interval</span><span class="p">)</span>
</pre></div>
</div>
<p>with details to handle ‘blitting’ (to dramatically improve the live
performance), to be non-blocking, handle repeats, multiple animated
axes, and easily save the animation to a movie file.</p>
<p>‘Blitting’ is a <a class="reference external" href="https://en.wikipedia.org/wiki/Bit_blit">old technique</a> in computer graphics. The
general gist is to take an existing bit map (in our case a mostly
rasterized figure) and then ‘blit’ one more artist on top. Thus, by
managing a saved ‘clean’ bitmap, we can only re-draw the few artists
that are changing at each frame and possibly save significant amounts of
time. When using blitting (by passing <code class="docutils literal"><span class="pre">blit=True</span></code>) the core loop of
<a class="reference internal" href="_as_gen/matplotlib.animation.FuncAnimation.html#matplotlib.animation.FuncAnimation" title="matplotlib.animation.FuncAnimation"><code class="xref py py-obj docutils literal"><span class="pre">FuncAnimation</span></code></a> gets a bit more complicated</p>
<div class="highlight-default"><div class="highlight"><pre><span></span><span class="n">ax</span> <span class="o">=</span> <span class="n">fig</span><span class="o">.</span><span class="n">gca</span><span class="p">()</span>
<span class="k">def</span> <span class="nf">update_blit</span><span class="p">(</span><span class="n">artists</span><span class="p">):</span>
<span class="n">fig</span><span class="o">.</span><span class="n">canvas</span><span class="o">.</span><span class="n">restore_region</span><span class="p">(</span><span class="n">bg_cache</span><span class="p">)</span>
<span class="k">for</span> <span class="n">a</span> <span class="ow">in</span> <span class="n">artists</span><span class="p">:</span>
<span class="n">a</span><span class="o">.</span><span class="n">axes</span><span class="o">.</span><span class="n">draw_artist</span><span class="p">(</span><span class="n">a</span><span class="p">)</span>
<span class="n">ax</span><span class="o">.</span><span class="n">figure</span><span class="o">.</span><span class="n">canvas</span><span class="o">.</span><span class="n">blit</span><span class="p">(</span><span class="n">ax</span><span class="o">.</span><span class="n">bbox</span><span class="p">)</span>
<span class="n">artists</span> <span class="o">=</span> <span class="n">init_func</span><span class="p">()</span>
<span class="k">for</span> <span class="n">a</span> <span class="ow">in</span> <span class="n">artists</span><span class="p">:</span>
<span class="n">a</span><span class="o">.</span><span class="n">set_animated</span><span class="p">(</span><span class="kc">True</span><span class="p">)</span>
<span class="n">fig</span><span class="o">.</span><span class="n">canvas</span><span class="o">.</span><span class="n">draw</span><span class="p">()</span>
<span class="n">bg_cache</span> <span class="o">=</span> <span class="n">fig</span><span class="o">.</span><span class="n">canvas</span><span class="o">.</span><span class="n">copy_from_bbox</span><span class="p">(</span><span class="n">ax</span><span class="o">.</span><span class="n">bbox</span><span class="p">)</span>
<span class="k">for</span> <span class="n">f</span> <span class="ow">in</span> <span class="n">frames</span><span class="p">:</span>
<span class="n">artists</span> <span class="o">=</span> <span class="n">func</span><span class="p">(</span><span class="n">f</span><span class="p">,</span> <span class="o">*</span><span class="n">fargs</span><span class="p">)</span>
<span class="n">update_blit</span><span class="p">(</span><span class="n">artists</span><span class="p">)</span>
<span class="n">plt</span><span class="o">.</span><span class="n">pause</span><span class="p">(</span><span class="n">interval</span><span class="p">)</span>
</pre></div>
</div>
<p>This is of course leaving out many details (such as updating the
background when the figure is resized or fully re-drawn). However,
this hopefully minimalist example gives a sense of how <code class="docutils literal"><span class="pre">init_func</span></code>
and <code class="docutils literal"><span class="pre">func</span></code> are used inside of <a class="reference internal" href="_as_gen/matplotlib.animation.FuncAnimation.html#matplotlib.animation.FuncAnimation" title="matplotlib.animation.FuncAnimation"><code class="xref py py-obj docutils literal"><span class="pre">FuncAnimation</span></code></a> and the theory of how
‘blitting’ works.</p>
<p>The expected signature on <code class="docutils literal"><span class="pre">func</span></code> and <code class="docutils literal"><span class="pre">init_func</span></code> is very simple to
keep <a class="reference internal" href="_as_gen/matplotlib.animation.FuncAnimation.html#matplotlib.animation.FuncAnimation" title="matplotlib.animation.FuncAnimation"><code class="xref py py-obj docutils literal"><span class="pre">FuncAnimation</span></code></a> out of your book keeping and plotting logic, but
this means that the callable objects you pass in must know what
artists they should be working on. There are several approaches to
handling this, of varying complexity and encapsulation. The simplest
approach, which works quite well in the case of a script, is to define the
artist at a global scope and let Python sort things out. For example</p>
<div class="highlight-default"><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.pyplot</span> <span class="k">as</span> <span class="nn">plt</span>
<span class="kn">from</span> <span class="nn">matplotlib.animation</span> <span class="k">import</span> <span class="n">FuncAnimation</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">xdata</span><span class="p">,</span> <span class="n">ydata</span> <span class="o">=</span> <span class="p">[],</span> <span class="p">[]</span>
<span class="n">ln</span><span class="p">,</span> <span class="o">=</span> <span class="n">plt</span><span class="o">.</span><span class="n">plot</span><span class="p">([],</span> <span class="p">[],</span> <span class="s1">'ro'</span><span class="p">,</span> <span class="n">animated</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">init</span><span class="p">():</span>
<span class="n">ax</span><span class="o">.</span><span class="n">set_xlim</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="mi">2</span><span class="o">*</span><span class="n">np</span><span class="o">.</span><span class="n">pi</span><span class="p">)</span>
<span class="n">ax</span><span class="o">.</span><span class="n">set_ylim</span><span class="p">(</span><span class="o">-</span><span class="mi">1</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span>
<span class="k">return</span> <span class="n">ln</span><span class="p">,</span>
<span class="k">def</span> <span class="nf">update</span><span class="p">(</span><span class="n">frame</span><span class="p">):</span>
<span class="n">xdata</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">frame</span><span class="p">)</span>
<span class="n">ydata</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">np</span><span class="o">.</span><span class="n">sin</span><span class="p">(</span><span class="n">frame</span><span class="p">))</span>
<span class="n">ln</span><span class="o">.</span><span class="n">set_data</span><span class="p">(</span><span class="n">xdata</span><span class="p">,</span> <span class="n">ydata</span><span class="p">)</span>
<span class="k">return</span> <span class="n">ln</span><span class="p">,</span>
<span class="n">ani</span> <span class="o">=</span> <span class="n">FuncAnimation</span><span class="p">(</span><span class="n">fig</span><span class="p">,</span> <span class="n">update</span><span class="p">,</span> <span class="n">frames</span><span class="o">=</span><span class="n">np</span><span class="o">.</span><span class="n">linspace</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="mi">2</span><span class="o">*</span><span class="n">np</span><span class="o">.</span><span class="n">pi</span><span class="p">,</span> <span class="mi">128</span><span class="p">),</span>
<span class="n">init_func</span><span class="o">=</span><span class="n">init</span><span class="p">,</span> <span class="n">blit</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
<span class="n">plt</span><span class="o">.</span><span class="n">show</span><span class="p">()</span>
</pre></div>
</div>
<p>The second method is to us <code class="xref py py-obj docutils literal"><span class="pre">functools.partial</span></code> to ‘bind’ artists to
function. A third method is to use closures to build up the required
artists and functions. A fourth method is to create a class.</p>
<div class="section" id="examples">
<h4>Examples<a class="headerlink" href="#examples" title="Permalink to this headline">¶</a></h4>
<div class="toctree-wrapper compound">
<ul>
<li class="toctree-l1"><a class="reference internal" href="../examples/animation/animate_decay.html">animation example code: animate_decay.py</a></li>
<li class="toctree-l1"><a class="reference internal" href="../examples/animation/bayes_update.html">animation example code: bayes_update.py</a></li>
<li class="toctree-l1"><a class="reference internal" href="../examples/animation/double_pendulum_animated.html">animation example code: double_pendulum_animated.py</a></li>
<li class="toctree-l1"><a class="reference internal" href="../examples/animation/dynamic_image.html">animation example code: dynamic_image.py</a></li>
<li class="toctree-l1"><a class="reference internal" href="../examples/animation/histogram.html">animation example code: histogram.py</a></li>
<li class="toctree-l1"><a class="reference internal" href="../examples/animation/rain.html">animation example code: rain.py</a></li>
<li class="toctree-l1"><a class="reference internal" href="../examples/animation/random_data.html">animation example code: random_data.py</a></li>
<li class="toctree-l1"><a class="reference internal" href="../examples/animation/simple_3danim.html">animation example code: simple_3danim.py</a></li>
<li class="toctree-l1"><a class="reference internal" href="../examples/animation/simple_anim.html">animation example code: simple_anim.py</a></li>
<li class="toctree-l1"><a class="reference internal" href="../examples/animation/strip_chart_demo.html">animation example code: strip_chart_demo.py</a></li>
<li class="toctree-l1"><a class="reference internal" href="../examples/animation/unchained.html">animation example code: unchained.py</a></li>
</ul>
</div>
</div>
</div>
<div class="section" id="artistanimation">
<h3><code class="docutils literal"><span class="pre">ArtistAnimation</span></code><a class="headerlink" href="#artistanimation" title="Permalink to this headline">¶</a></h3>
<div class="section" id="id1">
<h4>Examples<a class="headerlink" href="#id1" title="Permalink to this headline">¶</a></h4>
<div class="toctree-wrapper compound">
<ul>
<li class="toctree-l1"><a class="reference internal" href="../examples/animation/basic_example.html">animation example code: basic_example.py</a></li>
<li class="toctree-l1"><a class="reference internal" href="../examples/animation/basic_example_writer.html">animation example code: basic_example_writer.py</a></li>
<li class="toctree-l1"><a class="reference internal" href="../examples/animation/dynamic_image2.html">animation example code: dynamic_image2.py</a></li>
</ul>
</div>
</div>
</div>
</div>
<div class="section" id="writer-classes">
<h2><a class="toc-backref" href="#id3">Writer Classes</a><a class="headerlink" href="#writer-classes" title="Permalink to this headline">¶</a></h2>
<p>The provided writers fall into two broad categories: pipe-based and
file-based. The pipe-based writers stream the captured frames over a
pipe to an external process. The pipe-based variants tend to be more
performant, but may not work on all systems.</p>
<table border="1" class="longtable docutils">
<colgroup>
<col width="10%" />
<col width="90%" />
</colgroup>
<tbody valign="top">
<tr class="row-odd"><td><a class="reference internal" href="_as_gen/matplotlib.animation.FFMpegWriter.html#matplotlib.animation.FFMpegWriter" title="matplotlib.animation.FFMpegWriter"><code class="xref py py-obj docutils literal"><span class="pre">FFMpegWriter</span></code></a></td>
<td>Pipe-based ffmpeg writer.</td>
</tr>
<tr class="row-even"><td><a class="reference internal" href="_as_gen/matplotlib.animation.ImageMagickFileWriter.html#matplotlib.animation.ImageMagickFileWriter" title="matplotlib.animation.ImageMagickFileWriter"><code class="xref py py-obj docutils literal"><span class="pre">ImageMagickFileWriter</span></code></a></td>
<td>File-based animated gif writer.</td>
</tr>
<tr class="row-odd"><td><a class="reference internal" href="_as_gen/matplotlib.animation.AVConvWriter.html#matplotlib.animation.AVConvWriter" title="matplotlib.animation.AVConvWriter"><code class="xref py py-obj docutils literal"><span class="pre">AVConvWriter</span></code></a></td>
<td>Pipe-based avconv writer.</td>
</tr>
</tbody>
</table>
<p>Alternatively the file-based writers save temporary files for each
frame which are stitched into a single file at the end. Although
slower, these writers can be easier to debug.</p>
<table border="1" class="longtable docutils">
<colgroup>
<col width="10%" />
<col width="90%" />
</colgroup>
<tbody valign="top">
<tr class="row-odd"><td><a class="reference internal" href="_as_gen/matplotlib.animation.FFMpegFileWriter.html#matplotlib.animation.FFMpegFileWriter" title="matplotlib.animation.FFMpegFileWriter"><code class="xref py py-obj docutils literal"><span class="pre">FFMpegFileWriter</span></code></a></td>
<td>File-based ffmpeg writer.</td>
</tr>
<tr class="row-even"><td><a class="reference internal" href="_as_gen/matplotlib.animation.ImageMagickWriter.html#matplotlib.animation.ImageMagickWriter" title="matplotlib.animation.ImageMagickWriter"><code class="xref py py-obj docutils literal"><span class="pre">ImageMagickWriter</span></code></a></td>
<td>Pipe-based animated gif.</td>
</tr>
<tr class="row-odd"><td><a class="reference internal" href="_as_gen/matplotlib.animation.AVConvFileWriter.html#matplotlib.animation.AVConvFileWriter" title="matplotlib.animation.AVConvFileWriter"><code class="xref py py-obj docutils literal"><span class="pre">AVConvFileWriter</span></code></a></td>
<td>File-based avconv writer.</td>
</tr>
</tbody>
</table>
<p>Fundamentally, a <a class="reference internal" href="_as_gen/matplotlib.animation.MovieWriter.html#matplotlib.animation.MovieWriter" title="matplotlib.animation.MovieWriter"><code class="xref py py-obj docutils literal"><span class="pre">MovieWriter</span></code></a> provides a way to grab sequential frames
from the same underlying <a class="reference internal" href="figure_api.html#matplotlib.figure.Figure" title="matplotlib.figure.Figure"><code class="xref py py-obj docutils literal"><span class="pre">Figure</span></code></a> object. The base
class <a class="reference internal" href="_as_gen/matplotlib.animation.MovieWriter.html#matplotlib.animation.MovieWriter" title="matplotlib.animation.MovieWriter"><code class="xref py py-obj docutils literal"><span class="pre">MovieWriter</span></code></a> implements 3 methods and a context manager. The
only difference between the pipe-based and file-based writers is in the
arguments to their respective <code class="docutils literal"><span class="pre">setup</span></code> methods.</p>
<table border="1" class="longtable docutils">
<colgroup>
<col width="10%" />
<col width="90%" />
</colgroup>
<tbody valign="top">
<tr class="row-odd"><td><a class="reference internal" href="_as_gen/matplotlib.animation.MovieWriter.setup.html#matplotlib.animation.MovieWriter.setup" title="matplotlib.animation.MovieWriter.setup"><code class="xref py py-obj docutils literal"><span class="pre">MovieWriter.setup</span></code></a></td>
<td>Perform setup for writing the movie file.</td>
</tr>
<tr class="row-even"><td><a class="reference internal" href="_as_gen/matplotlib.animation.FileMovieWriter.setup.html#matplotlib.animation.FileMovieWriter.setup" title="matplotlib.animation.FileMovieWriter.setup"><code class="xref py py-obj docutils literal"><span class="pre">FileMovieWriter.setup</span></code></a></td>
<td>Perform setup for writing the movie file.</td>
</tr>
<tr class="row-odd"><td><a class="reference internal" href="_as_gen/matplotlib.animation.MovieWriter.grab_frame.html#matplotlib.animation.MovieWriter.grab_frame" title="matplotlib.animation.MovieWriter.grab_frame"><code class="xref py py-obj docutils literal"><span class="pre">MovieWriter.grab_frame</span></code></a></td>
<td>Grab the image information from the figure and save as a movie frame.</td>
</tr>
<tr class="row-even"><td><a class="reference internal" href="_as_gen/matplotlib.animation.MovieWriter.finish.html#matplotlib.animation.MovieWriter.finish" title="matplotlib.animation.MovieWriter.finish"><code class="xref py py-obj docutils literal"><span class="pre">MovieWriter.finish</span></code></a></td>
<td>Finish any processing for writing the movie.</td>
</tr>
<tr class="row-odd"><td><a class="reference internal" href="_as_gen/matplotlib.animation.MovieWriter.saving.html#matplotlib.animation.MovieWriter.saving" title="matplotlib.animation.MovieWriter.saving"><code class="xref py py-obj docutils literal"><span class="pre">MovieWriter.saving</span></code></a></td>
<td>Context manager to facilitate writing the movie file.</td>
</tr>
</tbody>
</table>
<p>The <code class="docutils literal"><span class="pre">setup()</span></code> method is used to prepare the writer (possibly opening
a pipe), successive calls to <code class="docutils literal"><span class="pre">grab_frame()</span></code> capture a single frame
at a time and <code class="docutils literal"><span class="pre">finish()</span></code> finalizes the movie and writes the output
file to disk. For example</p>
<div class="highlight-default"><div class="highlight"><pre><span></span><span class="n">moviewriter</span> <span class="o">=</span> <span class="n">MovieWriter</span><span class="p">(</span><span class="o">...</span><span class="p">)</span>
<span class="n">moviewriter</span><span class="o">.</span><span class="n">setup</span><span class="p">(</span><span class="n">fig</span><span class="o">=</span><span class="n">fig</span><span class="p">,</span> <span class="s1">'my_movie.ext'</span><span class="p">,</span> <span class="n">dpi</span><span class="o">=</span><span class="mi">100</span><span class="p">)</span>
<span class="k">for</span> <span class="n">j</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="n">n</span><span class="p">):</span>
<span class="n">update_figure</span><span class="p">(</span><span class="n">n</span><span class="p">)</span>
<span class="n">moviewriter</span><span class="o">.</span><span class="n">grab_frame</span><span class="p">()</span>
<span class="n">moviewriter</span><span class="o">.</span><span class="n">finish</span><span class="p">()</span>
</pre></div>
</div>
<p>If using the writer classes directly (not through <a class="reference internal" href="_as_gen/matplotlib.animation.Animation.save.html#matplotlib.animation.Animation.save" title="matplotlib.animation.Animation.save"><code class="xref py py-obj docutils literal"><span class="pre">Animation.save</span></code></a>), it is strongly encouraged
to use the <a class="reference internal" href="_as_gen/matplotlib.animation.MovieWriter.saving.html#matplotlib.animation.MovieWriter.saving" title="matplotlib.animation.MovieWriter.saving"><code class="xref py py-obj docutils literal"><span class="pre">saving</span></code></a> context manager</p>
<div class="highlight-default"><div class="highlight"><pre><span></span><span class="k">with</span> <span class="n">moviewriter</span><span class="o">.</span><span class="n">saving</span><span class="p">(</span><span class="n">fig</span><span class="p">,</span> <span class="s1">'myfile.mp4'</span><span class="p">,</span> <span class="n">dpi</span><span class="o">=</span><span class="mi">100</span><span class="p">):</span>
<span class="k">for</span> <span class="n">j</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="n">n</span><span class="p">):</span>
<span class="n">update_figure</span><span class="p">(</span><span class="n">n</span><span class="p">)</span>
<span class="n">moviewriter</span><span class="o">.</span><span class="n">grab_frame</span><span class="p">()</span>
</pre></div>
</div>
<p>to ensures that setup and cleanup are performed as necessary.</p>
<p><a class="reference internal" href="../examples/animation/moviewriter.html#animation-moviewriter"><span class="std std-ref">animation example code: moviewriter.py</span></a></p>
</div>
<div class="section" id="helper-classes">
<span id="ani-writer-classes"></span><h2><a class="toc-backref" href="#id4">Helper Classes</a><a class="headerlink" href="#helper-classes" title="Permalink to this headline">¶</a></h2>
<div class="section" id="animation-base-classes">
<h3>Animation Base Classes<a class="headerlink" href="#animation-base-classes" title="Permalink to this headline">¶</a></h3>
<table border="1" class="longtable docutils">
<colgroup>
<col width="10%" />
<col width="90%" />
</colgroup>
<tbody valign="top">
<tr class="row-odd"><td><a class="reference internal" href="_as_gen/matplotlib.animation.Animation.html#matplotlib.animation.Animation" title="matplotlib.animation.Animation"><code class="xref py py-obj docutils literal"><span class="pre">Animation</span></code></a></td>
<td>This class wraps the creation of an animation using matplotlib.</td>
</tr>
<tr class="row-even"><td><a class="reference internal" href="_as_gen/matplotlib.animation.TimedAnimation.html#matplotlib.animation.TimedAnimation" title="matplotlib.animation.TimedAnimation"><code class="xref py py-obj docutils literal"><span class="pre">TimedAnimation</span></code></a></td>
<td><a class="reference internal" href="_as_gen/matplotlib.animation.Animation.html#matplotlib.animation.Animation" title="matplotlib.animation.Animation"><code class="xref py py-class docutils literal"><span class="pre">Animation</span></code></a> subclass for time-based animation.</td>
</tr>
</tbody>
</table>
</div>
<div class="section" id="custom-animation-classes">
<h3>Custom Animation classes<a class="headerlink" href="#custom-animation-classes" title="Permalink to this headline">¶</a></h3>
<p><a class="reference internal" href="../examples/animation/subplots.html#animation-subplots"><span class="std std-ref">animation example code: subplots.py</span></a></p>
</div>
<div class="section" id="writer-registry">
<h3>Writer Registry<a class="headerlink" href="#writer-registry" title="Permalink to this headline">¶</a></h3>
<p>A module-level registry is provided to map between the name of the
writer and the class to allow a string to be passed to
<a class="reference internal" href="_as_gen/matplotlib.animation.Animation.save.html#matplotlib.animation.Animation.save" title="matplotlib.animation.Animation.save"><code class="xref py py-obj docutils literal"><span class="pre">Animation.save</span></code></a> instead of a writer instance.</p>
<table border="1" class="longtable docutils">
<colgroup>
<col width="10%" />
<col width="90%" />
</colgroup>
<tbody valign="top">
<tr class="row-odd"><td><a class="reference internal" href="_as_gen/matplotlib.animation.MovieWriterRegistry.html#matplotlib.animation.MovieWriterRegistry" title="matplotlib.animation.MovieWriterRegistry"><code class="xref py py-obj docutils literal"><span class="pre">MovieWriterRegistry</span></code></a></td>
<td>Registry of available writer classes by human readable name.</td>
</tr>
</tbody>
</table>
</div>
<div class="section" id="writer-base-classes">
<h3>Writer Base Classes<a class="headerlink" href="#writer-base-classes" title="Permalink to this headline">¶</a></h3>
<p>To reduce code duplication base classes</p>
<table border="1" class="longtable docutils">
<colgroup>
<col width="10%" />
<col width="90%" />
</colgroup>
<tbody valign="top">
<tr class="row-odd"><td><a class="reference internal" href="_as_gen/matplotlib.animation.MovieWriter.html#matplotlib.animation.MovieWriter" title="matplotlib.animation.MovieWriter"><code class="xref py py-obj docutils literal"><span class="pre">MovieWriter</span></code></a></td>
<td>Base class for writing movies.</td>
</tr>
<tr class="row-even"><td><a class="reference internal" href="_as_gen/matplotlib.animation.FileMovieWriter.html#matplotlib.animation.FileMovieWriter" title="matplotlib.animation.FileMovieWriter"><code class="xref py py-obj docutils literal"><span class="pre">FileMovieWriter</span></code></a></td>
<td><a class="reference internal" href="_as_gen/matplotlib.animation.MovieWriter.html#matplotlib.animation.MovieWriter" title="matplotlib.animation.MovieWriter"><code class="xref py py-obj docutils literal"><span class="pre">MovieWriter</span></code></a> for writing to individual files and stitching at the end.</td>
</tr>
</tbody>
</table>
<p>and mixins are provided</p>
<table border="1" class="longtable docutils">
<colgroup>
<col width="10%" />
<col width="90%" />
</colgroup>
<tbody valign="top">
<tr class="row-odd"><td><a class="reference internal" href="_as_gen/matplotlib.animation.AVConvBase.html#matplotlib.animation.AVConvBase" title="matplotlib.animation.AVConvBase"><code class="xref py py-obj docutils literal"><span class="pre">AVConvBase</span></code></a></td>
<td>Mixin class for avconv output.</td>
</tr>
<tr class="row-even"><td><a class="reference internal" href="_as_gen/matplotlib.animation.FFMpegBase.html#matplotlib.animation.FFMpegBase" title="matplotlib.animation.FFMpegBase"><code class="xref py py-obj docutils literal"><span class="pre">FFMpegBase</span></code></a></td>
<td>Mixin class for FFMpeg output.</td>
</tr>
<tr class="row-odd"><td><a class="reference internal" href="_as_gen/matplotlib.animation.ImageMagickBase.html#matplotlib.animation.ImageMagickBase" title="matplotlib.animation.ImageMagickBase"><code class="xref py py-obj docutils literal"><span class="pre">ImageMagickBase</span></code></a></td>
<td>Mixin class for ImageMagick output.</td>
</tr>
</tbody>
</table>
<p>See the source code for how to easily implement new <a class="reference internal" href="_as_gen/matplotlib.animation.MovieWriter.html#matplotlib.animation.MovieWriter" title="matplotlib.animation.MovieWriter"><code class="xref py py-obj docutils literal"><span class="pre">MovieWriter</span></code></a>
classes.</p>
</div>
</div>
<div class="section" id="inheritance-diagrams">
<h2><a class="toc-backref" href="#id5">Inheritance Diagrams</a><a class="headerlink" href="#inheritance-diagrams" title="Permalink to this headline">¶</a></h2>
<img src="../_images/inheritance-3d770d91db12b7ba71313f03e0382aa6506036be.png" alt="Inheritance diagram of matplotlib.animation.FuncAnimation, matplotlib.animation.ArtistAnimation" usemap="#inheritance95f52c58c5" class="inheritance"/>
<map id="inheritance95f52c58c5" name="inheritance95f52c58c5">
<area shape="rect" id="node1" href="_as_gen/matplotlib.animation.Animation.html#matplotlib.animation.Animation" target="_top" title="This class wraps the creation of an animation using matplotlib." alt="" coords="5,27,208,49"/>
<area shape="rect" id="node3" href="_as_gen/matplotlib.animation.TimedAnimation.html#matplotlib.animation.TimedAnimation" target="_top" title=":class:`Animation` subclass for time-based animation." alt="" coords="250,27,488,49"/>
<area shape="rect" id="node2" href="_as_gen/matplotlib.animation.ArtistAnimation.html#matplotlib.animation.ArtistAnimation" target="_top" title="Animation using a fixed set of `Artist` objects." alt="" coords="530,5,763,27"/>
<area shape="rect" id="node4" href="_as_gen/matplotlib.animation.FuncAnimation.html#matplotlib.animation.FuncAnimation" target="_top" title="Makes an animation by repeatedly calling a function ``func``." alt="" coords="533,48,760,70"/>
</map>
<img src="../_images/inheritance-53b4331e203e70850e6a83c65bc3a3b70298d0f7.png" alt="Inheritance diagram of matplotlib.animation.AVConvFileWriter, matplotlib.animation.AVConvWriter, matplotlib.animation.FFMpegFileWriter, matplotlib.animation.FFMpegWriter, matplotlib.animation.ImageMagickFileWriter, matplotlib.animation.ImageMagickWriter" usemap="#inheritance7d9f599b8e" class="inheritance"/>
<map id="inheritance7d9f599b8e" name="inheritance7d9f599b8e">
<area shape="rect" id="node1" href="_as_gen/matplotlib.animation.AVConvBase.html#matplotlib.animation.AVConvBase" target="_top" title="Mixin class for avconv output." alt="" coords="413,32,557,47"/>
<area shape="rect" id="node3" href="_as_gen/matplotlib.animation.AVConvFileWriter.html#matplotlib.animation.AVConvFileWriter" target="_top" title="File-based avconv writer." alt="" coords="604,47,765,62"/>
<area shape="rect" id="node5" href="_as_gen/matplotlib.animation.AVConvWriter.html#matplotlib.animation.AVConvWriter" target="_top" title="Pipe-based avconv writer." alt="" coords="611,11,758,26"/>
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<h2><a class="toc-backref" href="#id6">Deprecated</a><a class="headerlink" href="#deprecated" title="Permalink to this headline">¶</a></h2>
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<tr class="row-odd"><td><a class="reference internal" href="_as_gen/matplotlib.animation.MencoderBase.html#matplotlib.animation.MencoderBase" title="matplotlib.animation.MencoderBase"><code class="xref py py-obj docutils literal"><span class="pre">MencoderBase</span></code></a></td>
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<tr class="row-even"><td><a class="reference internal" href="_as_gen/matplotlib.animation.MencoderFileWriter.html#matplotlib.animation.MencoderFileWriter" title="matplotlib.animation.MencoderFileWriter"><code class="xref py py-obj docutils literal"><span class="pre">MencoderFileWriter</span></code></a></td>
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<p><span class="versionmodified">Deprecated since version 2.0.</span></p>
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<tr class="row-odd"><td><a class="reference internal" href="_as_gen/matplotlib.animation.MencoderWriter.html#matplotlib.animation.MencoderWriter" title="matplotlib.animation.MencoderWriter"><code class="xref py py-obj docutils literal"><span class="pre">MencoderWriter</span></code></a></td>
<td><div class="deprecated">
<p><span class="versionmodified">Deprecated since version 2.0.</span></p>
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