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| <section id="module-apache_beam.transforms.deduplicate"> |
| <span id="apache-beam-transforms-deduplicate-module"></span><h1>apache_beam.transforms.deduplicate module<a class="headerlink" href="#module-apache_beam.transforms.deduplicate" title="Link to this heading"></a></h1> |
| <p>a collection of ptransforms for deduplicating elements.</p> |
| <dl class="py class"> |
| <dt class="sig sig-object py" id="apache_beam.transforms.deduplicate.Deduplicate"> |
| <em class="property"><span class="pre">class</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">apache_beam.transforms.deduplicate.</span></span><span class="sig-name descname"><span class="pre">Deduplicate</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">processing_time_duration</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">None</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">event_time_duration</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">None</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/transforms/deduplicate.html#Deduplicate"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#apache_beam.transforms.deduplicate.Deduplicate" title="Link 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 notranslate"><span class="pre">PTransform</span></code></a></p> |
| <p>Similar to DeduplicatePerKey, the Deduplicate transform takes any arbitrary |
| value as input and uses value as key to deduplicate among certain amount of |
| time duration.</p> |
| <dl class="py method"> |
| <dt class="sig sig-object py" id="apache_beam.transforms.deduplicate.Deduplicate.expand"> |
| <span class="sig-name descname"><span class="pre">expand</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">pcoll</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/transforms/deduplicate.html#Deduplicate.expand"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#apache_beam.transforms.deduplicate.Deduplicate.expand" title="Link to this definition"></a></dt> |
| <dd></dd></dl> |
| |
| </dd></dl> |
| |
| <dl class="py class"> |
| <dt class="sig sig-object py" id="apache_beam.transforms.deduplicate.DeduplicatePerKey"> |
| <em class="property"><span class="pre">class</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">apache_beam.transforms.deduplicate.</span></span><span class="sig-name descname"><span class="pre">DeduplicatePerKey</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">processing_time_duration</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">None</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">event_time_duration</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">None</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/transforms/deduplicate.html#DeduplicatePerKey"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#apache_beam.transforms.deduplicate.DeduplicatePerKey" title="Link 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 notranslate"><span class="pre">PTransform</span></code></a></p> |
| <p>A PTransform which deduplicates <key, value> pair over a time domain and |
| threshold. Values in different windows will NOT be considered duplicates of |
| each other. Deduplication is guaranteed with respect of time domain and |
| duration.</p> |
| <p>Time durations are required so as to avoid unbounded memory and/or storage |
| requirements within a runner and care might need to be used to ensure that the |
| deduplication time limit is long enough to remove duplicates but short enough |
| to not cause performance problems within a runner. Each runner may provide an |
| optimized implementation of their choice using the deduplication time domain |
| and threshold specified.</p> |
| <p>Does not preserve any order the input PCollection might have had.</p> |
| <dl class="py method"> |
| <dt class="sig sig-object py" id="apache_beam.transforms.deduplicate.DeduplicatePerKey.expand"> |
| <span class="sig-name descname"><span class="pre">expand</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">pcoll</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/transforms/deduplicate.html#DeduplicatePerKey.expand"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#apache_beam.transforms.deduplicate.DeduplicatePerKey.expand" title="Link to this definition"></a></dt> |
| <dd></dd></dl> |
| |
| </dd></dl> |
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