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<li><a class="reference internal" href="#">Minimum Version of Dependencies Policy</a><ul>

<li><a class="reference internal" href="#python-and-numpy">Python and numpy</a></li>

<li><a class="reference internal" href="#python-dependencies">Python Dependencies</a></li>

<li><a class="reference internal" href="#system-and-c-dependencies">System and C-dependencies</a></li>

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<div class="section" id="minimum-version-of-dependencies-policy">

<span id="min-deps-policy"></span><h1>Minimum Version of Dependencies Policy<a class="headerlink" href="#minimum-version-of-dependencies-policy" title="Permalink to this headline">¶</a></h1>

<div class="section" id="python-and-numpy">

<h2>Python and numpy<a class="headerlink" href="#python-and-numpy" title="Permalink to this headline">¶</a></h2>

<ul class="simple">

<li>support minor versions of <code class="docutils literal notranslate"><span class="pre">Python</span></code> initially released in the previous

3 years</li>

<li>support minor versions of <code class="docutils literal notranslate"><span class="pre">numpy</span></code> initially released in the

previous 3 years or oldest that supports the minimum python version

(which ever is higher)</li>

<p>We will bump the minimum python and numpy versions as we can every

minor and major release, but never on a patch release.</p>

<div class="section" id="python-dependencies">

<h2>Python Dependencies<a class="headerlink" href="#python-dependencies" title="Permalink to this headline">¶</a></h2>

<p>For python dependencies we should support at least</p>

<dl class="docutils">

<dt>with compiled extensions</dt>

<dd>minor versions released in the last 3 years

or the oldest that support our minimum python + numpy</dd>

<dt>without complied extensions</dt>

<dd>minor versions released in the last 2 years or the oldest that

supports our minimum python.</dd>

<p>We will only bump these dependencies as we need new features or the

old versions no longer support our minimum numpy or python.</p>

<div class="section" id="system-and-c-dependencies">

<h2>System and C-dependencies<a class="headerlink" href="#system-and-c-dependencies" title="Permalink to this headline">¶</a></h2>

<p>For system or c-dependencies (libpng, freetype, GUI frameworks, latex,

gs, ffmpeg) support as old as practical. These can be difficult to

install for end-users and we want to be usable on as many systems as

possible. We will bump these on a case-by-case basis.</p>

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