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| <div class="section" id="module-apache_beam.runners.interactive.interactive_beam"> |
| <span id="apache-beam-runners-interactive-interactive-beam-module"></span><h1>apache_beam.runners.interactive.interactive_beam module<a class="headerlink" href="#module-apache_beam.runners.interactive.interactive_beam" title="Permalink to this headline">¶</a></h1> |
| <p>Module of Interactive Beam features that can be used in notebook.</p> |
| <p>The purpose of the module is to reduce the learning curve of Interactive Beam |
| users, provide a single place for importing and add sugar syntax for all |
| Interactive Beam components. It gives users capability to interact with existing |
| environment/session/context for Interactive Beam and visualize PCollections as |
| bounded dataset. In the meantime, it hides the interactivity implementation |
| from users so that users can focus on developing Beam pipeline without worrying |
| about how hidden states in the interactive session are managed.</p> |
| <p>Note: If you want backward-compatibility, only invoke interfaces provided by |
| this module in your notebook or application code.</p> |
| <dl class="function"> |
| <dt id="apache_beam.runners.interactive.interactive_beam.watch"> |
| <code class="descclassname">apache_beam.runners.interactive.interactive_beam.</code><code class="descname">watch</code><span class="sig-paren">(</span><em>watchable</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/runners/interactive/interactive_beam.html#watch"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.runners.interactive.interactive_beam.watch" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Monitors a watchable.</p> |
| <p>This allows Interactive Beam to implicitly pass on the information about the |
| location of your pipeline definition.</p> |
| <p>Current implementation mainly watches for PCollection variables defined in |
| user code. A watchable can be a dictionary of variable metadata such as |
| locals(), a str name of a module, a module object or an instance of a class. |
| The variable can come from any scope even local variables in a method of a |
| class defined in a module.</p> |
| <blockquote> |
| <div><p>Below are all valid:</p> |
| <div class="highlight-default"><div class="highlight"><pre><span></span><span class="n">watch</span><span class="p">(</span><span class="n">__main__</span><span class="p">)</span> <span class="c1"># if import __main__ is already invoked</span> |
| <span class="n">watch</span><span class="p">(</span><span class="s1">'__main__'</span><span class="p">)</span> <span class="c1"># does not require invoking import __main__ beforehand</span> |
| <span class="n">watch</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="c1"># inside a class</span> |
| <span class="n">watch</span><span class="p">(</span><span class="n">SomeInstance</span><span class="p">())</span> <span class="c1"># an instance of a class</span> |
| <span class="n">watch</span><span class="p">(</span><span class="nb">locals</span><span class="p">())</span> <span class="c1"># inside a function, watching local variables within</span> |
| </pre></div> |
| </div> |
| </div></blockquote> |
| <p>If you write a Beam pipeline in the __main__ module directly, since the |
| __main__ module is always watched, you don’t have to instruct Interactive |
| Beam. If your Beam pipeline is defined in some module other than __main__, |
| such as inside a class function or a unit test, you can watch() the scope.</p> |
| <blockquote> |
| <div><p>For example:</p> |
| <div class="highlight-default"><div class="highlight"><pre><span></span><span class="k">class</span> <span class="nc">Foo</span><span class="p">(</span><span class="nb">object</span><span class="p">)</span> |
| <span class="k">def</span> <span class="nf">run_pipeline</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="n">p</span> <span class="o">=</span> <span class="n">beam</span><span class="o">.</span><span class="n">Pipeline</span><span class="p">()</span> |
| <span class="n">init_pcoll</span> <span class="o">=</span> <span class="n">p</span> <span class="o">|</span> <span class="s1">'Init Create'</span> <span class="o">>></span> <span class="n">beam</span><span class="o">.</span><span class="n">Create</span><span class="p">(</span><span class="nb">range</span><span class="p">(</span><span class="mi">10</span><span class="p">))</span> |
| <span class="n">watch</span><span class="p">(</span><span class="nb">locals</span><span class="p">())</span> |
| <span class="n">p</span><span class="o">.</span><span class="n">run</span><span class="p">()</span> |
| <span class="k">return</span> <span class="n">init_pcoll</span> |
| <span class="n">init_pcoll</span> <span class="o">=</span> <span class="n">Foo</span><span class="p">()</span><span class="o">.</span><span class="n">run_pipeline</span><span class="p">()</span> |
| </pre></div> |
| </div> |
| <p>Interactive Beam caches init_pcoll for the first run.</p> |
| <p>Then you can use:</p> |
| <div class="highlight-default"><div class="highlight"><pre><span></span><span class="n">visualize</span><span class="p">(</span><span class="n">init_pcoll</span><span class="p">)</span> |
| </pre></div> |
| </div> |
| <p>To visualize data from init_pcoll once the pipeline is executed.</p> |
| </div></blockquote> |
| </dd></dl> |
| |
| <dl class="function"> |
| <dt id="apache_beam.runners.interactive.interactive_beam.visualize"> |
| <code class="descclassname">apache_beam.runners.interactive.interactive_beam.</code><code class="descname">visualize</code><span class="sig-paren">(</span><em>pcoll</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/runners/interactive/interactive_beam.html#visualize"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.runners.interactive.interactive_beam.visualize" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Visualizes a PCollection.</p> |
| </dd></dl> |
| |
| </div> |
| |
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