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   <div class="section" id="module-apache_beam.transforms.combiners">
 <span id="apache-beam-transforms-combiners-module"></span><h1>apache_beam.transforms.combiners module<a class="headerlink" href="#module-apache_beam.transforms.combiners" title="Permalink to this headline">¶</a></h1>
 <p>A library of basic combiner PTransform subclasses.</p>
 <dl class="class">
 <dt id="apache_beam.transforms.combiners.Mean">
 <em class="property">class </em><code class="descclassname">apache_beam.transforms.combiners.</code><code class="descname">Mean</code><a class="reference internal" href="_modules/apache_beam/transforms/combiners.html#Mean"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.transforms.combiners.Mean" 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>Combiners for computing arithmetic means of elements.</p>
 <dl class="class">
 <dt id="apache_beam.transforms.combiners.Mean.Globally">
 <em class="property">class </em><code class="descname">Globally</code><span class="sig-paren">(</span><em>label=None</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/transforms/combiners.html#Mean.Globally"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.transforms.combiners.Mean.Globally" title="Permalink to this definition">¶</a></dt>
 <dd><p>Bases: <a class="reference internal" href="apache_beam.transforms.ptransform.html#apache_beam.transforms.ptransform.PTransform" title="apache_beam.transforms.ptransform.PTransform"><code class="xref py py-class docutils literal"><span class="pre">apache_beam.transforms.ptransform.PTransform</span></code></a></p>
 <p>combiners.Mean.Globally computes the arithmetic mean of the elements.</p>
 <dl class="method">
 <dt id="apache_beam.transforms.combiners.Mean.Globally.expand">
 <code class="descname">expand</code><span class="sig-paren">(</span><em>pcoll</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/transforms/combiners.html#Mean.Globally.expand"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.transforms.combiners.Mean.Globally.expand" title="Permalink to this definition">¶</a></dt>
 <dd></dd></dl>

 </dd></dl>

 <dl class="class">
 <dt id="apache_beam.transforms.combiners.Mean.PerKey">
 <em class="property">class </em><code class="descname">PerKey</code><span class="sig-paren">(</span><em>label=None</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/transforms/combiners.html#Mean.PerKey"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.transforms.combiners.Mean.PerKey" title="Permalink to this definition">¶</a></dt>
 <dd><p>Bases: <a class="reference internal" href="apache_beam.transforms.ptransform.html#apache_beam.transforms.ptransform.PTransform" title="apache_beam.transforms.ptransform.PTransform"><code class="xref py py-class docutils literal"><span class="pre">apache_beam.transforms.ptransform.PTransform</span></code></a></p>
 <p>combiners.Mean.PerKey finds the means of the values for each key.</p>
 <dl class="method">
 <dt id="apache_beam.transforms.combiners.Mean.PerKey.expand">
 <code class="descname">expand</code><span class="sig-paren">(</span><em>pcoll</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/transforms/combiners.html#Mean.PerKey.expand"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.transforms.combiners.Mean.PerKey.expand" title="Permalink to this definition">¶</a></dt>
 <dd></dd></dl>

 </dd></dl>

 </dd></dl>

 <dl class="class">
 <dt id="apache_beam.transforms.combiners.Count">
 <em class="property">class </em><code class="descclassname">apache_beam.transforms.combiners.</code><code class="descname">Count</code><a class="reference internal" href="_modules/apache_beam/transforms/combiners.html#Count"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.transforms.combiners.Count" 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>Combiners for counting elements.</p>
 <dl class="class">
 <dt id="apache_beam.transforms.combiners.Count.Globally">
 <em class="property">class </em><code class="descname">Globally</code><span class="sig-paren">(</span><em>label=None</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/transforms/combiners.html#Count.Globally"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.transforms.combiners.Count.Globally" title="Permalink to this definition">¶</a></dt>
 <dd><p>Bases: <a class="reference internal" href="apache_beam.transforms.ptransform.html#apache_beam.transforms.ptransform.PTransform" title="apache_beam.transforms.ptransform.PTransform"><code class="xref py py-class docutils literal"><span class="pre">apache_beam.transforms.ptransform.PTransform</span></code></a></p>
 <p>combiners.Count.Globally counts the total number of elements.</p>
 <dl class="method">
 <dt id="apache_beam.transforms.combiners.Count.Globally.expand">
 <code class="descname">expand</code><span class="sig-paren">(</span><em>pcoll</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/transforms/combiners.html#Count.Globally.expand"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.transforms.combiners.Count.Globally.expand" title="Permalink to this definition">¶</a></dt>
 <dd></dd></dl>

 </dd></dl>

 <dl class="class">
 <dt id="apache_beam.transforms.combiners.Count.PerKey">
 <em class="property">class </em><code class="descname">PerKey</code><span class="sig-paren">(</span><em>label=None</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/transforms/combiners.html#Count.PerKey"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.transforms.combiners.Count.PerKey" title="Permalink to this definition">¶</a></dt>
 <dd><p>Bases: <a class="reference internal" href="apache_beam.transforms.ptransform.html#apache_beam.transforms.ptransform.PTransform" title="apache_beam.transforms.ptransform.PTransform"><code class="xref py py-class docutils literal"><span class="pre">apache_beam.transforms.ptransform.PTransform</span></code></a></p>
 <p>combiners.Count.PerKey counts how many elements each unique key has.</p>
 <dl class="method">
 <dt id="apache_beam.transforms.combiners.Count.PerKey.expand">
 <code class="descname">expand</code><span class="sig-paren">(</span><em>pcoll</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/transforms/combiners.html#Count.PerKey.expand"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.transforms.combiners.Count.PerKey.expand" title="Permalink to this definition">¶</a></dt>
 <dd></dd></dl>

 </dd></dl>

 <dl class="class">
 <dt id="apache_beam.transforms.combiners.Count.PerElement">
 <em class="property">class </em><code class="descname">PerElement</code><span class="sig-paren">(</span><em>label=None</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/transforms/combiners.html#Count.PerElement"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.transforms.combiners.Count.PerElement" title="Permalink to this definition">¶</a></dt>
 <dd><p>Bases: <a class="reference internal" href="apache_beam.transforms.ptransform.html#apache_beam.transforms.ptransform.PTransform" title="apache_beam.transforms.ptransform.PTransform"><code class="xref py py-class docutils literal"><span class="pre">apache_beam.transforms.ptransform.PTransform</span></code></a></p>
 <p>combiners.Count.PerElement counts how many times each element occurs.</p>
 <dl class="method">
 <dt id="apache_beam.transforms.combiners.Count.PerElement.expand">
 <code class="descname">expand</code><span class="sig-paren">(</span><em>pcoll</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/transforms/combiners.html#Count.PerElement.expand"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.transforms.combiners.Count.PerElement.expand" title="Permalink to this definition">¶</a></dt>
 <dd></dd></dl>

 </dd></dl>

 </dd></dl>

 <dl class="class">
 <dt id="apache_beam.transforms.combiners.Top">
 <em class="property">class </em><code class="descclassname">apache_beam.transforms.combiners.</code><code class="descname">Top</code><a class="reference internal" href="_modules/apache_beam/transforms/combiners.html#Top"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.transforms.combiners.Top" 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>Combiners for obtaining extremal elements.</p>
 <dl class="staticmethod">
 <dt id="apache_beam.transforms.combiners.Top.Of">
 <em class="property">static </em><code class="descname">Of</code><span class="sig-paren">(</span><em>*args</em>, <em>**kwargs</em><span class="sig-paren">)</span><a class="headerlink" href="#apache_beam.transforms.combiners.Top.Of" title="Permalink to this definition">¶</a></dt>
 <dd></dd></dl>

 <dl class="staticmethod">
 <dt id="apache_beam.transforms.combiners.Top.PerKey">
 <em class="property">static </em><code class="descname">PerKey</code><span class="sig-paren">(</span><em>*args</em>, <em>**kwargs</em><span class="sig-paren">)</span><a class="headerlink" href="#apache_beam.transforms.combiners.Top.PerKey" title="Permalink to this definition">¶</a></dt>
 <dd></dd></dl>

 <dl class="staticmethod">
 <dt id="apache_beam.transforms.combiners.Top.Largest">
 <em class="property">static </em><code class="descname">Largest</code><span class="sig-paren">(</span><em>*args</em>, <em>**kwargs</em><span class="sig-paren">)</span><a class="headerlink" href="#apache_beam.transforms.combiners.Top.Largest" title="Permalink to this definition">¶</a></dt>
 <dd></dd></dl>

 <dl class="staticmethod">
 <dt id="apache_beam.transforms.combiners.Top.Smallest">
 <em class="property">static </em><code class="descname">Smallest</code><span class="sig-paren">(</span><em>*args</em>, <em>**kwargs</em><span class="sig-paren">)</span><a class="headerlink" href="#apache_beam.transforms.combiners.Top.Smallest" title="Permalink to this definition">¶</a></dt>
 <dd></dd></dl>

 <dl class="staticmethod">
 <dt id="apache_beam.transforms.combiners.Top.LargestPerKey">
 <em class="property">static </em><code class="descname">LargestPerKey</code><span class="sig-paren">(</span><em>*args</em>, <em>**kwargs</em><span class="sig-paren">)</span><a class="headerlink" href="#apache_beam.transforms.combiners.Top.LargestPerKey" title="Permalink to this definition">¶</a></dt>
 <dd></dd></dl>

 <dl class="staticmethod">
 <dt id="apache_beam.transforms.combiners.Top.SmallestPerKey">
 <em class="property">static </em><code class="descname">SmallestPerKey</code><span class="sig-paren">(</span><em>*args</em>, <em>**kwargs</em><span class="sig-paren">)</span><a class="headerlink" href="#apache_beam.transforms.combiners.Top.SmallestPerKey" title="Permalink to this definition">¶</a></dt>
 <dd></dd></dl>

 </dd></dl>

 <dl class="class">
 <dt id="apache_beam.transforms.combiners.Sample">
 <em class="property">class </em><code class="descclassname">apache_beam.transforms.combiners.</code><code class="descname">Sample</code><a class="reference internal" href="_modules/apache_beam/transforms/combiners.html#Sample"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.transforms.combiners.Sample" 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>Combiners for sampling n elements without replacement.</p>
 <dl class="staticmethod">
 <dt id="apache_beam.transforms.combiners.Sample.FixedSizeGlobally">
 <em class="property">static </em><code class="descname">FixedSizeGlobally</code><span class="sig-paren">(</span><em>*args</em>, <em>**kwargs</em><span class="sig-paren">)</span><a class="headerlink" href="#apache_beam.transforms.combiners.Sample.FixedSizeGlobally" title="Permalink to this definition">¶</a></dt>
 <dd></dd></dl>

 <dl class="staticmethod">
 <dt id="apache_beam.transforms.combiners.Sample.FixedSizePerKey">
 <em class="property">static </em><code class="descname">FixedSizePerKey</code><span class="sig-paren">(</span><em>*args</em>, <em>**kwargs</em><span class="sig-paren">)</span><a class="headerlink" href="#apache_beam.transforms.combiners.Sample.FixedSizePerKey" title="Permalink to this definition">¶</a></dt>
 <dd></dd></dl>

 </dd></dl>

 <dl class="class">
 <dt id="apache_beam.transforms.combiners.ToList">
 <em class="property">class </em><code class="descclassname">apache_beam.transforms.combiners.</code><code class="descname">ToList</code><span class="sig-paren">(</span><em>label='ToList'</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/transforms/combiners.html#ToList"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.transforms.combiners.ToList" title="Permalink to this definition">¶</a></dt>
 <dd><p>Bases: <a class="reference internal" href="apache_beam.transforms.ptransform.html#apache_beam.transforms.ptransform.PTransform" title="apache_beam.transforms.ptransform.PTransform"><code class="xref py py-class docutils literal"><span class="pre">apache_beam.transforms.ptransform.PTransform</span></code></a></p>
 <p>A global CombineFn that condenses a PCollection into a single list.</p>
 <dl class="method">
 <dt id="apache_beam.transforms.combiners.ToList.expand">
 <code class="descname">expand</code><span class="sig-paren">(</span><em>pcoll</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/transforms/combiners.html#ToList.expand"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.transforms.combiners.ToList.expand" title="Permalink to this definition">¶</a></dt>
 <dd></dd></dl>

 </dd></dl>

 <dl class="class">
 <dt id="apache_beam.transforms.combiners.ToDict">
 <em class="property">class </em><code class="descclassname">apache_beam.transforms.combiners.</code><code class="descname">ToDict</code><span class="sig-paren">(</span><em>label='ToDict'</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/transforms/combiners.html#ToDict"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.transforms.combiners.ToDict" title="Permalink to this definition">¶</a></dt>
 <dd><p>Bases: <a class="reference internal" href="apache_beam.transforms.ptransform.html#apache_beam.transforms.ptransform.PTransform" title="apache_beam.transforms.ptransform.PTransform"><code class="xref py py-class docutils literal"><span class="pre">apache_beam.transforms.ptransform.PTransform</span></code></a></p>
 <p>A global CombineFn that condenses a PCollection into a single dict.</p>
 <p>PCollections should consist of 2-tuples, notionally (key, value) pairs.
 If multiple values are associated with the same key, only one of the values
 will be present in the resulting dict.</p>
 <dl class="method">
 <dt id="apache_beam.transforms.combiners.ToDict.expand">
 <code class="descname">expand</code><span class="sig-paren">(</span><em>pcoll</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/transforms/combiners.html#ToDict.expand"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.transforms.combiners.ToDict.expand" title="Permalink to this definition">¶</a></dt>
 <dd></dd></dl>

 </dd></dl>

 </div>


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