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  <div class="section" id="additional-packages">
<h1>Additional packages<a class="headerlink" href="#additional-packages" title="Permalink to this headline"></a></h1>
<p>Hypothesis itself does not have any dependencies, but there are some packages that
need additional things installed in order to work.</p>
<p>You can install these dependencies using the setuptools extra feature as e.g.
<code class="docutils literal"><span class="pre">pip</span> <span class="pre">install</span> <span class="pre">hypothesis[django]</span></code>. This will check installation of compatible versions.</p>
<p>You can also just install hypothesis into a project using them, ignore the version
constraints, and hope for the best.</p>
<p>In general “Which version is Hypothesis compatible with?” is a hard question to answer
and even harder to regularly test. Hypothesis is always tested against the latest
compatible version and each package will note the expected compatibility range. If
you run into a bug with any of these please specify the dependency version.</p>
<p>There are seperate pages for <a class="reference internal" href="django.html"><span class="doc">Hypothesis for Django users</span></a> and <a class="reference internal" href="numpy.html"><span class="doc">Hypothesis for the Scientific Stack</span></a>.</p>
<div class="section" id="module-hypothesis.extra.pytz">
<span id="hypothesis-pytz"></span><h2>hypothesis[pytz]<a class="headerlink" href="#module-hypothesis.extra.pytz" title="Permalink to this headline"></a></h2>
<p>This module provides <code class="docutils literal"><span class="pre">pytz</span></code> timezones.</p>
<p>You can use this strategy to make
<a class="reference internal" href="data.html#hypothesis.strategies.datetimes" title="hypothesis.strategies.datetimes"><code class="xref py py-func docutils literal"><span class="pre">hypothesis.strategies.datetimes()</span></code></a> and
<a class="reference internal" href="data.html#hypothesis.strategies.times" title="hypothesis.strategies.times"><code class="xref py py-func docutils literal"><span class="pre">hypothesis.strategies.times()</span></code></a> produce timezone-aware values.</p>
<dl class="function">
<dt id="hypothesis.extra.pytz.timezones">
<code class="descclassname">hypothesis.extra.pytz.</code><code class="descname">timezones</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="reference internal" href="_modules/hypothesis/extra/pytz.html#timezones"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#hypothesis.extra.pytz.timezones" title="Permalink to this definition"></a></dt>
<dd><p>Any timezone in the Olsen database, as a pytz tzinfo object.</p>
<p>This strategy minimises to UTC, or the smallest possible fixed
offset, and is designed for use with
<a class="reference internal" href="data.html#hypothesis.strategies.datetimes" title="hypothesis.strategies.datetimes"><code class="xref py py-func docutils literal"><span class="pre">hypothesis.strategies.datetimes()</span></code></a>.</p>
</dd></dl>

</div>
<div class="section" id="module-hypothesis.extra.datetime">
<span id="hypothesis-datetime"></span><h2>hypothesis[datetime]<a class="headerlink" href="#module-hypothesis.extra.datetime" title="Permalink to this headline"></a></h2>
<p>This module provides deprecated time and date related strategies.</p>
<p>It depends on the <code class="docutils literal"><span class="pre">pytz</span></code> package, which is stable enough that almost any
version should be compatible - most updates are for the timezone database.</p>
<dl class="function">
<dt id="hypothesis.extra.datetime.datetimes">
<code class="descclassname">hypothesis.extra.datetime.</code><code class="descname">datetimes</code><span class="sig-paren">(</span><em>allow_naive=None</em>, <em>timezones=None</em>, <em>min_year=None</em>, <em>max_year=None</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/hypothesis/extra/datetime.html#datetimes"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#hypothesis.extra.datetime.datetimes" title="Permalink to this definition"></a></dt>
<dd><p>Return a strategy for generating datetimes.</p>
<div class="deprecated">
<p><span class="versionmodified">Deprecated since version 3.9.0: </span>use <a class="reference internal" href="data.html#hypothesis.strategies.datetimes" title="hypothesis.strategies.datetimes"><code class="xref py py-func docutils literal"><span class="pre">hypothesis.strategies.datetimes()</span></code></a> instead.</p>
</div>
<p>allow_naive=True will cause the values to sometimes be naive.
timezones is the set of permissible timezones. If set to an empty
collection all datetimes will be naive. If set to None all timezones
available via pytz will be used.</p>
<p>All generated datetimes will be between min_year and max_year, inclusive.</p>
</dd></dl>

<dl class="function">
<dt id="hypothesis.extra.datetime.dates">
<code class="descclassname">hypothesis.extra.datetime.</code><code class="descname">dates</code><span class="sig-paren">(</span><em>min_year=None</em>, <em>max_year=None</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/hypothesis/extra/datetime.html#dates"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#hypothesis.extra.datetime.dates" title="Permalink to this definition"></a></dt>
<dd><p>Return a strategy for generating dates.</p>
<div class="deprecated">
<p><span class="versionmodified">Deprecated since version 3.9.0: </span>use <a class="reference internal" href="data.html#hypothesis.strategies.dates" title="hypothesis.strategies.dates"><code class="xref py py-func docutils literal"><span class="pre">hypothesis.strategies.dates()</span></code></a> instead.</p>
</div>
<p>All generated dates will be between min_year and max_year, inclusive.</p>
</dd></dl>

<dl class="function">
<dt id="hypothesis.extra.datetime.times">
<code class="descclassname">hypothesis.extra.datetime.</code><code class="descname">times</code><span class="sig-paren">(</span><em>allow_naive=None</em>, <em>timezones=None</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/hypothesis/extra/datetime.html#times"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#hypothesis.extra.datetime.times" title="Permalink to this definition"></a></dt>
<dd><p>Return a strategy for generating times.</p>
<div class="deprecated">
<p><span class="versionmodified">Deprecated since version 3.9.0: </span>use <a class="reference internal" href="data.html#hypothesis.strategies.times" title="hypothesis.strategies.times"><code class="xref py py-func docutils literal"><span class="pre">hypothesis.strategies.times()</span></code></a> instead.</p>
</div>
<p>The allow_naive and timezones arguments act the same as the datetimes
strategy above.</p>
</dd></dl>

</div>
<div class="section" id="hypothesis-fakefactory">
<span id="faker-extra"></span><h2>hypothesis[fakefactory]<a class="headerlink" href="#hypothesis-fakefactory" title="Permalink to this headline"></a></h2>
<div class="admonition note">
<p class="first admonition-title">Note</p>
<p>This extra package is deprecated.  We strongly recommend using native
Hypothesis strategies, which are more effective at both finding and
shrinking failing examples for your tests.</p>
<p class="last">The <a class="reference internal" href="data.html#hypothesis.strategies.from_regex" title="hypothesis.strategies.from_regex"><code class="xref py py-func docutils literal"><span class="pre">from_regex()</span></code></a>,
<a class="reference internal" href="data.html#hypothesis.strategies.text" title="hypothesis.strategies.text"><code class="xref py py-func docutils literal"><span class="pre">text()</span></code></a> (with some specific alphabet), and
<a class="reference internal" href="data.html#hypothesis.strategies.sampled_from" title="hypothesis.strategies.sampled_from"><code class="xref py py-func docutils literal"><span class="pre">sampled_from()</span></code></a> strategies may be particularly
useful.</p>
</div>
<p><a class="reference external" href="https://pypi.python.org/pypi/Faker">Faker</a> (previously <a class="reference external" href="https://pypi.python.org/pypi/fake-factory">fake-factory</a>) is a Python package that
generates fake data for you. It’s great for bootstraping your database,
creating good-looking XML documents, stress-testing a database, or anonymizing
production data.  However, it’s not designed for automated testing - data from
Hypothesis looks less realistic, but produces minimal bug-triggering examples
and uses coverage information to check more cases.</p>
<p><code class="docutils literal"><span class="pre">hypothesis.extra.fakefactory</span></code> lets you use Faker generators to parametrize
Hypothesis tests.  This was only ever meant to ease your transition to
Hypothesis, but we’ve improved Hypothesis enough since then that we no longer
recommend using Faker for automated tests under any circumstances.</p>
<p>hypothesis.extra.fakefactory defines a function fake_factory which returns a
strategy for producing text data from any Faker provider.</p>
<p>So for example the following will parametrize a test by an email address:</p>
<div class="highlight-pycon"><div class="highlight"><pre><span></span><span class="gp">&gt;&gt;&gt; </span><span class="n">fake_factory</span><span class="p">(</span><span class="s1">&#39;email&#39;</span><span class="p">)</span><span class="o">.</span><span class="n">example</span><span class="p">()</span>
<span class="go">&#39;tnader@prosacco.info&#39;</span>

<span class="gp">&gt;&gt;&gt; </span><span class="n">fake_factory</span><span class="p">(</span><span class="s1">&#39;name&#39;</span><span class="p">)</span><span class="o">.</span><span class="n">example</span><span class="p">()</span>
<span class="go">&#39;Zbyněk Černý CSc.&#39;</span>
</pre></div>
</div>
<p>You can explicitly specify the locale (otherwise it uses any of the available
locales), either as a single locale or as several:</p>
<div class="highlight-pycon"><div class="highlight"><pre><span></span><span class="gp">&gt;&gt;&gt; </span><span class="n">fake_factory</span><span class="p">(</span><span class="s1">&#39;name&#39;</span><span class="p">,</span> <span class="n">locale</span><span class="o">=</span><span class="s1">&#39;en_GB&#39;</span><span class="p">)</span><span class="o">.</span><span class="n">example</span><span class="p">()</span>
<span class="go">&#39;Antione Gerlach&#39;</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">fake_factory</span><span class="p">(</span><span class="s1">&#39;name&#39;</span><span class="p">,</span> <span class="n">locales</span><span class="o">=</span><span class="p">[</span><span class="s1">&#39;en_GB&#39;</span><span class="p">,</span> <span class="s1">&#39;cs_CZ&#39;</span><span class="p">])</span><span class="o">.</span><span class="n">example</span><span class="p">()</span>
<span class="go">&#39;Miloš Šťastný&#39;</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">fake_factory</span><span class="p">(</span><span class="s1">&#39;name&#39;</span><span class="p">,</span> <span class="n">locales</span><span class="o">=</span><span class="p">[</span><span class="s1">&#39;en_GB&#39;</span><span class="p">,</span> <span class="s1">&#39;cs_CZ&#39;</span><span class="p">])</span><span class="o">.</span><span class="n">example</span><span class="p">()</span>
<span class="go">&#39;Harm Sanford&#39;</span>
</pre></div>
</div>
<p>You can use custom Faker providers via the <code class="docutils literal"><span class="pre">providers</span></code> argument:</p>
<div class="highlight-pycon"><div class="highlight"><pre><span></span><span class="gp">&gt;&gt;&gt; </span><span class="kn">from</span> <span class="nn">faker.providers</span> <span class="kn">import</span> <span class="n">BaseProvider</span>
<span class="gp">&gt;&gt;&gt; </span><span class="k">class</span> <span class="nc">KittenProvider</span><span class="p">(</span><span class="n">BaseProvider</span><span class="p">):</span>
<span class="gp">... </span>    <span class="k">def</span> <span class="nf">meows</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="gp">... </span>        <span class="k">return</span> <span class="s1">&#39;meow </span><span class="si">%d</span><span class="s1">&#39;</span> <span class="o">%</span> <span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">random_number</span><span class="p">(</span><span class="n">digits</span><span class="o">=</span><span class="mi">10</span><span class="p">),)</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">fake_factory</span><span class="p">(</span><span class="s1">&#39;meows&#39;</span><span class="p">,</span> <span class="n">providers</span><span class="o">=</span><span class="p">[</span><span class="n">KittenProvider</span><span class="p">])</span><span class="o">.</span><span class="n">example</span><span class="p">()</span>
<span class="go">&#39;meow 9139348419&#39;</span>
</pre></div>
</div>
</div>
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