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<div class="section" id="module-apache_beam">
<span id="apache-beam-package"></span><h1>apache_beam package<a class="headerlink" href="#module-apache_beam" title="Permalink to this headline"></a></h1>
<div class="section" id="apache-beam-sdk-for-python">
<h2>Apache Beam SDK for Python<a class="headerlink" href="#apache-beam-sdk-for-python" title="Permalink to this headline"></a></h2>
<p><a class="reference external" href="https://beam.apache.org">Apache Beam</a> provides a simple, powerful programming
model for building both batch and streaming parallel data processing pipelines.</p>
<p>The Apache Beam SDK for Python provides access to Apache Beam capabilities
from the Python programming language.</p>
<div class="section" id="status">
<h3>Status<a class="headerlink" href="#status" title="Permalink to this headline"></a></h3>
<p>The SDK is still early in its development, and significant changes
should be expected before the first stable version.</p>
</div>
<div class="section" id="overview">
<h3>Overview<a class="headerlink" href="#overview" title="Permalink to this headline"></a></h3>
<p>The key concepts in this programming model are</p>
<ul class="simple">
<li><a class="reference internal" href="apache_beam.pvalue.html#apache_beam.pvalue.PCollection" title="apache_beam.pvalue.PCollection"><code class="xref py py-class docutils literal"><span class="pre">PCollection</span></code></a>: represents a collection of data,
which could be bounded or unbounded in size.</li>
<li><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">PTransform</span></code></a>: represents a
computation that transforms input PCollections into output PCollections.</li>
<li><a class="reference internal" href="apache_beam.pipeline.html#apache_beam.pipeline.Pipeline" title="apache_beam.pipeline.Pipeline"><code class="xref py py-class docutils literal"><span class="pre">Pipeline</span></code></a>: manages a directed acyclic graph of
<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">PTransform</span></code></a> s and
<a class="reference internal" href="apache_beam.pvalue.html#apache_beam.pvalue.PCollection" title="apache_beam.pvalue.PCollection"><code class="xref py py-class docutils literal"><span class="pre">PCollection</span></code></a> s that is ready for execution.</li>
<li><a class="reference internal" href="apache_beam.runners.runner.html#apache_beam.runners.runner.PipelineRunner" title="apache_beam.runners.runner.PipelineRunner"><code class="xref py py-class docutils literal"><span class="pre">PipelineRunner</span></code></a>: specifies where and how
the pipeline should execute.</li>
<li><a class="reference internal" href="apache_beam.io.iobase.html#apache_beam.io.iobase.Read" title="apache_beam.io.iobase.Read"><code class="xref py py-class docutils literal"><span class="pre">Read</span></code></a>: read from an external source.</li>
<li><a class="reference internal" href="apache_beam.io.iobase.html#apache_beam.io.iobase.Write" title="apache_beam.io.iobase.Write"><code class="xref py py-class docutils literal"><span class="pre">Write</span></code></a>: write to an external data sink.</li>
</ul>
</div>
<div class="section" id="typical-usage">
<h3>Typical usage<a class="headerlink" href="#typical-usage" title="Permalink to this headline"></a></h3>
<p>At the top of your source file:</p>
<div class="highlight-default"><div class="highlight"><pre><span></span><span class="kn">import</span> <span class="nn">apache_beam</span> <span class="k">as</span> <span class="nn">beam</span>
</pre></div>
</div>
<p>After this import statement</p>
<ul class="simple">
<li>Transform classes are available as
<a class="reference internal" href="apache_beam.transforms.core.html#apache_beam.transforms.core.FlatMap" title="apache_beam.transforms.core.FlatMap"><code class="xref py py-class docutils literal"><span class="pre">beam.FlatMap</span></code></a>,
<a class="reference internal" href="apache_beam.transforms.core.html#apache_beam.transforms.core.GroupByKey" title="apache_beam.transforms.core.GroupByKey"><code class="xref py py-class docutils literal"><span class="pre">beam.GroupByKey</span></code></a>, etc.</li>
<li>Pipeline class is available as
<a class="reference internal" href="apache_beam.pipeline.html#apache_beam.pipeline.Pipeline" title="apache_beam.pipeline.Pipeline"><code class="xref py py-class docutils literal"><span class="pre">beam.Pipeline</span></code></a></li>
<li>Text read/write transforms are available as
<a class="reference internal" href="apache_beam.io.textio.html#apache_beam.io.textio.ReadFromText" title="apache_beam.io.textio.ReadFromText"><code class="xref py py-class docutils literal"><span class="pre">beam.io.ReadFromText</span></code></a>,
<a class="reference internal" href="apache_beam.io.textio.html#apache_beam.io.textio.WriteToText" title="apache_beam.io.textio.WriteToText"><code class="xref py py-class docutils literal"><span class="pre">beam.io.WriteToText</span></code></a>.</li>
</ul>
<p class="rubric">Examples</p>
<p>The <a class="reference external" href="https://github.com/apache/beam/tree/master/sdks/python/apache_beam/examples">examples subdirectory</a>
has some examples.</p>
</div>
</div>
<div class="section" id="subpackages">
<h2>Subpackages<a class="headerlink" href="#subpackages" title="Permalink to this headline"></a></h2>
<div class="toctree-wrapper compound">
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<li class="toctree-l1"><a class="reference internal" href="apache_beam.coders.html">apache_beam.coders package</a><ul>
<li class="toctree-l2"><a class="reference internal" href="apache_beam.coders.html#submodules">Submodules</a><ul>
<li class="toctree-l3"><a class="reference internal" href="apache_beam.coders.coders.html">apache_beam.coders.coders module</a></li>
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<li class="toctree-l3"><a class="reference internal" href="apache_beam.coders.typecoders.html">apache_beam.coders.typecoders module</a></li>
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<li class="toctree-l1"><a class="reference internal" href="apache_beam.internal.html">apache_beam.internal package</a><ul>
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<li class="toctree-l5"><a class="reference internal" href="apache_beam.internal.gcp.auth.html">apache_beam.internal.gcp.auth module</a></li>
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</ul>
</li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="apache_beam.metrics.html">apache_beam.metrics package</a><ul>
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<li class="toctree-l3"><a class="reference internal" href="apache_beam.metrics.cells.html">apache_beam.metrics.cells module</a></li>
<li class="toctree-l3"><a class="reference internal" href="apache_beam.metrics.metric.html">apache_beam.metrics.metric module</a></li>
<li class="toctree-l3"><a class="reference internal" href="apache_beam.metrics.metricbase.html">apache_beam.metrics.metricbase module</a></li>
</ul>
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<li class="toctree-l1"><a class="reference internal" href="apache_beam.options.html">apache_beam.options package</a><ul>
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<li class="toctree-l3"><a class="reference internal" href="apache_beam.options.pipeline_options.html">apache_beam.options.pipeline_options module</a></li>
<li class="toctree-l3"><a class="reference internal" href="apache_beam.options.pipeline_options_validator.html">apache_beam.options.pipeline_options_validator module</a></li>
<li class="toctree-l3"><a class="reference internal" href="apache_beam.options.value_provider.html">apache_beam.options.value_provider module</a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="apache_beam.portability.html">apache_beam.portability package</a><ul>
<li class="toctree-l2"><a class="reference internal" href="apache_beam.portability.html#subpackages">Subpackages</a><ul>
<li class="toctree-l3"><a class="reference internal" href="apache_beam.portability.api.html">apache_beam.portability.api package</a><ul>
<li class="toctree-l4"><a class="reference internal" href="apache_beam.portability.api.html#submodules">Submodules</a><ul>
<li class="toctree-l5"><a class="reference internal" href="apache_beam.portability.api.beam_artifact_api_pb2_grpc.html">apache_beam.portability.api.beam_artifact_api_pb2_grpc module</a></li>
<li class="toctree-l5"><a class="reference internal" href="apache_beam.portability.api.beam_fn_api_pb2_grpc.html">apache_beam.portability.api.beam_fn_api_pb2_grpc module</a></li>
<li class="toctree-l5"><a class="reference internal" href="apache_beam.portability.api.beam_job_api_pb2_grpc.html">apache_beam.portability.api.beam_job_api_pb2_grpc module</a></li>
<li class="toctree-l5"><a class="reference internal" href="apache_beam.portability.api.beam_provision_api_pb2_grpc.html">apache_beam.portability.api.beam_provision_api_pb2_grpc module</a></li>
<li class="toctree-l5"><a class="reference internal" href="apache_beam.portability.api.beam_runner_api_pb2_grpc.html">apache_beam.portability.api.beam_runner_api_pb2_grpc module</a></li>
<li class="toctree-l5"><a class="reference internal" href="apache_beam.portability.api.endpoints_pb2_grpc.html">apache_beam.portability.api.endpoints_pb2_grpc module</a></li>
<li class="toctree-l5"><a class="reference internal" href="apache_beam.portability.api.standard_window_fns_pb2_grpc.html">apache_beam.portability.api.standard_window_fns_pb2_grpc module</a></li>
</ul>
</li>
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</li>
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</li>
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<li class="toctree-l1"><a class="reference internal" href="apache_beam.runners.html">apache_beam.runners package</a><ul>
<li class="toctree-l2"><a class="reference internal" href="apache_beam.runners.html#subpackages">Subpackages</a><ul>
<li class="toctree-l3"><a class="reference internal" href="apache_beam.runners.dataflow.html">apache_beam.runners.dataflow package</a><ul>
<li class="toctree-l4"><a class="reference internal" href="apache_beam.runners.dataflow.html#subpackages">Subpackages</a><ul>
<li class="toctree-l5"><a class="reference internal" href="apache_beam.runners.dataflow.native_io.html">apache_beam.runners.dataflow.native_io package</a><ul>
<li class="toctree-l6"><a class="reference internal" href="apache_beam.runners.dataflow.native_io.html#submodules">Submodules</a><ul>
<li class="toctree-l7"><a class="reference internal" href="apache_beam.runners.dataflow.native_io.iobase.html">apache_beam.runners.dataflow.native_io.iobase module</a></li>
<li class="toctree-l7"><a class="reference internal" href="apache_beam.runners.dataflow.native_io.streaming_create.html">apache_beam.runners.dataflow.native_io.streaming_create module</a></li>
</ul>
</li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l4"><a class="reference internal" href="apache_beam.runners.dataflow.html#submodules">Submodules</a><ul>
<li class="toctree-l5"><a class="reference internal" href="apache_beam.runners.dataflow.dataflow_metrics.html">apache_beam.runners.dataflow.dataflow_metrics module</a></li>
<li class="toctree-l5"><a class="reference internal" href="apache_beam.runners.dataflow.dataflow_runner.html">apache_beam.runners.dataflow.dataflow_runner module</a></li>
<li class="toctree-l5"><a class="reference internal" href="apache_beam.runners.dataflow.ptransform_overrides.html">apache_beam.runners.dataflow.ptransform_overrides module</a></li>
<li class="toctree-l5"><a class="reference internal" href="apache_beam.runners.dataflow.test_dataflow_runner.html">apache_beam.runners.dataflow.test_dataflow_runner module</a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="apache_beam.runners.direct.html">apache_beam.runners.direct package</a><ul>
<li class="toctree-l4"><a class="reference internal" href="apache_beam.runners.direct.html#submodules">Submodules</a><ul>
<li class="toctree-l5"><a class="reference internal" href="apache_beam.runners.direct.bundle_factory.html">apache_beam.runners.direct.bundle_factory module</a></li>
<li class="toctree-l5"><a class="reference internal" href="apache_beam.runners.direct.clock.html">apache_beam.runners.direct.clock module</a></li>
<li class="toctree-l5"><a class="reference internal" href="apache_beam.runners.direct.consumer_tracking_pipeline_visitor.html">apache_beam.runners.direct.consumer_tracking_pipeline_visitor module</a></li>
<li class="toctree-l5"><a class="reference internal" href="apache_beam.runners.direct.direct_metrics.html">apache_beam.runners.direct.direct_metrics module</a></li>
<li class="toctree-l5"><a class="reference internal" href="apache_beam.runners.direct.direct_runner.html">apache_beam.runners.direct.direct_runner module</a></li>
<li class="toctree-l5"><a class="reference internal" href="apache_beam.runners.direct.evaluation_context.html">apache_beam.runners.direct.evaluation_context module</a></li>
<li class="toctree-l5"><a class="reference internal" href="apache_beam.runners.direct.executor.html">apache_beam.runners.direct.executor module</a></li>
<li class="toctree-l5"><a class="reference internal" href="apache_beam.runners.direct.helper_transforms.html">apache_beam.runners.direct.helper_transforms module</a></li>
<li class="toctree-l5"><a class="reference internal" href="apache_beam.runners.direct.transform_evaluator.html">apache_beam.runners.direct.transform_evaluator module</a></li>
<li class="toctree-l5"><a class="reference internal" href="apache_beam.runners.direct.util.html">apache_beam.runners.direct.util module</a></li>
<li class="toctree-l5"><a class="reference internal" href="apache_beam.runners.direct.watermark_manager.html">apache_beam.runners.direct.watermark_manager module</a></li>
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<li class="toctree-l3"><a class="reference internal" href="apache_beam.runners.experimental.html">apache_beam.runners.experimental package</a><ul>
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<li class="toctree-l5"><a class="reference internal" href="apache_beam.runners.experimental.python_rpc_direct.html">apache_beam.runners.experimental.python_rpc_direct package</a><ul>
<li class="toctree-l6"><a class="reference internal" href="apache_beam.runners.experimental.python_rpc_direct.html#submodules">Submodules</a><ul>
<li class="toctree-l7"><a class="reference internal" href="apache_beam.runners.experimental.python_rpc_direct.python_rpc_direct_runner.html">apache_beam.runners.experimental.python_rpc_direct.python_rpc_direct_runner module</a></li>
<li class="toctree-l7"><a class="reference internal" href="apache_beam.runners.experimental.python_rpc_direct.server.html">apache_beam.runners.experimental.python_rpc_direct.server module</a></li>
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<li class="toctree-l3"><a class="reference internal" href="apache_beam.runners.job.html">apache_beam.runners.job package</a><ul>
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<li class="toctree-l5"><a class="reference internal" href="apache_beam.runners.job.manager.html">apache_beam.runners.job.manager module</a></li>
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<li class="toctree-l2"><a class="reference internal" href="apache_beam.runners.html#submodules">Submodules</a><ul>
<li class="toctree-l3"><a class="reference internal" href="apache_beam.runners.pipeline_context.html">apache_beam.runners.pipeline_context module</a></li>
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<li class="toctree-l1"><a class="reference internal" href="apache_beam.testing.html">apache_beam.testing package</a><ul>
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<li class="toctree-l3"><a class="reference internal" href="apache_beam.testing.pipeline_verifiers.html">apache_beam.testing.pipeline_verifiers module</a></li>
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<li class="toctree-l3"><a class="reference internal" href="apache_beam.testing.test_stream.html">apache_beam.testing.test_stream module</a></li>
<li class="toctree-l3"><a class="reference internal" href="apache_beam.testing.test_utils.html">apache_beam.testing.test_utils module</a></li>
<li class="toctree-l3"><a class="reference internal" href="apache_beam.testing.util.html">apache_beam.testing.util module</a></li>
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</li>
<li class="toctree-l1"><a class="reference internal" href="apache_beam.transforms.html">apache_beam.transforms package</a><ul>
<li class="toctree-l2"><a class="reference internal" href="apache_beam.transforms.html#submodules">Submodules</a><ul>
<li class="toctree-l3"><a class="reference internal" href="apache_beam.transforms.combiners.html">apache_beam.transforms.combiners module</a></li>
<li class="toctree-l3"><a class="reference internal" href="apache_beam.transforms.core.html">apache_beam.transforms.core module</a></li>
<li class="toctree-l3"><a class="reference internal" href="apache_beam.transforms.display.html">apache_beam.transforms.display module</a></li>
<li class="toctree-l3"><a class="reference internal" href="apache_beam.transforms.ptransform.html">apache_beam.transforms.ptransform module</a></li>
<li class="toctree-l3"><a class="reference internal" href="apache_beam.transforms.sideinputs.html">apache_beam.transforms.sideinputs module</a></li>
<li class="toctree-l3"><a class="reference internal" href="apache_beam.transforms.timeutil.html">apache_beam.transforms.timeutil module</a></li>
<li class="toctree-l3"><a class="reference internal" href="apache_beam.transforms.trigger.html">apache_beam.transforms.trigger module</a></li>
<li class="toctree-l3"><a class="reference internal" href="apache_beam.transforms.util.html">apache_beam.transforms.util module</a></li>
<li class="toctree-l3"><a class="reference internal" href="apache_beam.transforms.window.html">apache_beam.transforms.window module</a></li>
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<li class="toctree-l1"><a class="reference internal" href="apache_beam.typehints.html">apache_beam.typehints package</a><ul>
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<li class="toctree-l3"><a class="reference internal" href="apache_beam.typehints.decorators.html">apache_beam.typehints.decorators module</a></li>
<li class="toctree-l3"><a class="reference internal" href="apache_beam.typehints.native_type_compatibility.html">apache_beam.typehints.native_type_compatibility module</a></li>
<li class="toctree-l3"><a class="reference internal" href="apache_beam.typehints.opcodes.html">apache_beam.typehints.opcodes module</a></li>
<li class="toctree-l3"><a class="reference internal" href="apache_beam.typehints.trivial_inference.html">apache_beam.typehints.trivial_inference module</a></li>
<li class="toctree-l3"><a class="reference internal" href="apache_beam.typehints.typecheck.html">apache_beam.typehints.typecheck module</a></li>
<li class="toctree-l3"><a class="reference internal" href="apache_beam.typehints.typehints.html">apache_beam.typehints.typehints module</a></li>
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<li class="toctree-l1"><a class="reference internal" href="apache_beam.utils.html">apache_beam.utils package</a><ul>
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<li class="toctree-l3"><a class="reference internal" href="apache_beam.utils.annotations.html">apache_beam.utils.annotations module</a></li>
<li class="toctree-l3"><a class="reference internal" href="apache_beam.utils.plugin.html">apache_beam.utils.plugin module</a></li>
<li class="toctree-l3"><a class="reference internal" href="apache_beam.utils.processes.html">apache_beam.utils.processes module</a></li>
<li class="toctree-l3"><a class="reference internal" href="apache_beam.utils.profiler.html">apache_beam.utils.profiler module</a></li>
<li class="toctree-l3"><a class="reference internal" href="apache_beam.utils.proto_utils.html">apache_beam.utils.proto_utils module</a></li>
<li class="toctree-l3"><a class="reference internal" href="apache_beam.utils.retry.html">apache_beam.utils.retry module</a></li>
<li class="toctree-l3"><a class="reference internal" href="apache_beam.utils.timestamp.html">apache_beam.utils.timestamp module</a></li>
<li class="toctree-l3"><a class="reference internal" href="apache_beam.utils.urns.html">apache_beam.utils.urns module</a></li>
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<h2>Submodules<a class="headerlink" href="#submodules" title="Permalink to this headline"></a></h2>
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