| |
| |
| <!DOCTYPE html> |
| <!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]--> |
| <!--[if gt IE 8]><!--> <html class="no-js" lang="en" > <!--<![endif]--> |
| <head> |
| <meta charset="utf-8"> |
| |
| <meta name="viewport" content="width=device-width, initial-scale=1.0"> |
| |
| <title>apache_beam.io.gcp.pubsub — Apache Beam 2.38.0 documentation</title> |
| |
| |
| |
| |
| |
| |
| |
| |
| <script type="text/javascript" src="../../../../_static/js/modernizr.min.js"></script> |
| |
| |
| <script type="text/javascript" id="documentation_options" data-url_root="../../../../" src="../../../../_static/documentation_options.js"></script> |
| <script type="text/javascript" src="../../../../_static/jquery.js"></script> |
| <script type="text/javascript" src="../../../../_static/underscore.js"></script> |
| <script type="text/javascript" src="../../../../_static/doctools.js"></script> |
| <script type="text/javascript" src="../../../../_static/language_data.js"></script> |
| <script async="async" type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/latest.js?config=TeX-AMS-MML_HTMLorMML"></script> |
| |
| <script type="text/javascript" src="../../../../_static/js/theme.js"></script> |
| |
| |
| |
| |
| <link rel="stylesheet" href="../../../../_static/css/theme.css" type="text/css" /> |
| <link rel="stylesheet" href="../../../../_static/pygments.css" type="text/css" /> |
| <link rel="index" title="Index" href="../../../../genindex.html" /> |
| <link rel="search" title="Search" href="../../../../search.html" /> |
| </head> |
| |
| <body class="wy-body-for-nav"> |
| |
| |
| <div class="wy-grid-for-nav"> |
| |
| <nav data-toggle="wy-nav-shift" class="wy-nav-side"> |
| <div class="wy-side-scroll"> |
| <div class="wy-side-nav-search" > |
| |
| |
| |
| <a href="../../../../index.html" class="icon icon-home"> Apache Beam |
| |
| |
| |
| </a> |
| |
| |
| |
| |
| <div class="version"> |
| 2.38.0 |
| </div> |
| |
| |
| |
| |
| <div role="search"> |
| <form id="rtd-search-form" class="wy-form" action="../../../../search.html" method="get"> |
| <input type="text" name="q" placeholder="Search docs" /> |
| <input type="hidden" name="check_keywords" value="yes" /> |
| <input type="hidden" name="area" value="default" /> |
| </form> |
| </div> |
| |
| |
| </div> |
| |
| <div class="wy-menu wy-menu-vertical" data-spy="affix" role="navigation" aria-label="main navigation"> |
| |
| |
| |
| |
| |
| |
| <ul> |
| <li class="toctree-l1"><a class="reference internal" href="../../../../apache_beam.coders.html">apache_beam.coders package</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../../../../apache_beam.dataframe.html">apache_beam.dataframe package</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../../../../apache_beam.io.html">apache_beam.io package</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../../../../apache_beam.metrics.html">apache_beam.metrics package</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../../../../apache_beam.ml.html">apache_beam.ml package</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../../../../apache_beam.options.html">apache_beam.options package</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../../../../apache_beam.portability.html">apache_beam.portability package</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../../../../apache_beam.runners.html">apache_beam.runners package</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../../../../apache_beam.transforms.html">apache_beam.transforms package</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../../../../apache_beam.typehints.html">apache_beam.typehints package</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../../../../apache_beam.utils.html">apache_beam.utils package</a></li> |
| </ul> |
| <ul> |
| <li class="toctree-l1"><a class="reference internal" href="../../../../apache_beam.error.html">apache_beam.error module</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../../../../apache_beam.pipeline.html">apache_beam.pipeline module</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../../../../apache_beam.pvalue.html">apache_beam.pvalue module</a></li> |
| </ul> |
| |
| |
| |
| </div> |
| </div> |
| </nav> |
| |
| <section data-toggle="wy-nav-shift" class="wy-nav-content-wrap"> |
| |
| |
| <nav class="wy-nav-top" aria-label="top navigation"> |
| |
| <i data-toggle="wy-nav-top" class="fa fa-bars"></i> |
| <a href="../../../../index.html">Apache Beam</a> |
| |
| </nav> |
| |
| |
| <div class="wy-nav-content"> |
| |
| <div class="rst-content"> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| <div role="navigation" aria-label="breadcrumbs navigation"> |
| |
| <ul class="wy-breadcrumbs"> |
| |
| <li><a href="../../../../index.html">Docs</a> »</li> |
| |
| <li><a href="../../../index.html">Module code</a> »</li> |
| |
| <li>apache_beam.io.gcp.pubsub</li> |
| |
| |
| <li class="wy-breadcrumbs-aside"> |
| |
| </li> |
| |
| </ul> |
| |
| |
| <hr/> |
| </div> |
| <div role="main" class="document" itemscope="itemscope" itemtype="http://schema.org/Article"> |
| <div itemprop="articleBody"> |
| |
| <h1>Source code for apache_beam.io.gcp.pubsub</h1><div class="highlight"><pre> |
| <span></span><span class="c1">#</span> |
| <span class="c1"># Licensed to the Apache Software Foundation (ASF) under one or more</span> |
| <span class="c1"># contributor license agreements. See the NOTICE file distributed with</span> |
| <span class="c1"># this work for additional information regarding copyright ownership.</span> |
| <span class="c1"># The ASF licenses this file to You under the Apache License, Version 2.0</span> |
| <span class="c1"># (the "License"); you may not use this file except in compliance with</span> |
| <span class="c1"># the License. You may obtain a copy of the License at</span> |
| <span class="c1">#</span> |
| <span class="c1"># http://www.apache.org/licenses/LICENSE-2.0</span> |
| <span class="c1">#</span> |
| <span class="c1"># Unless required by applicable law or agreed to in writing, software</span> |
| <span class="c1"># distributed under the License is distributed on an "AS IS" BASIS,</span> |
| <span class="c1"># WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span> |
| <span class="c1"># See the License for the specific language governing permissions and</span> |
| <span class="c1"># limitations under the License.</span> |
| <span class="c1">#</span> |
| |
| <span class="sd">"""Google Cloud PubSub sources and sinks.</span> |
| |
| <span class="sd">Cloud Pub/Sub sources and sinks are currently supported only in streaming</span> |
| <span class="sd">pipelines, during remote execution.</span> |
| |
| <span class="sd">This API is currently under development and is subject to change.</span> |
| <span class="sd">"""</span> |
| |
| <span class="c1"># pytype: skip-file</span> |
| |
| <span class="kn">import</span> <span class="nn">re</span> |
| <span class="kn">from</span> <span class="nn">typing</span> <span class="kn">import</span> <span class="n">Any</span> |
| <span class="kn">from</span> <span class="nn">typing</span> <span class="kn">import</span> <span class="n">List</span> |
| <span class="kn">from</span> <span class="nn">typing</span> <span class="kn">import</span> <span class="n">NamedTuple</span> |
| <span class="kn">from</span> <span class="nn">typing</span> <span class="kn">import</span> <span class="n">Optional</span> |
| <span class="kn">from</span> <span class="nn">typing</span> <span class="kn">import</span> <span class="n">Tuple</span> |
| |
| <span class="kn">from</span> <span class="nn">apache_beam</span> <span class="kn">import</span> <span class="n">coders</span> |
| <span class="kn">from</span> <span class="nn">apache_beam.io.iobase</span> <span class="kn">import</span> <span class="n">Read</span> |
| <span class="kn">from</span> <span class="nn">apache_beam.io.iobase</span> <span class="kn">import</span> <span class="n">Write</span> |
| <span class="kn">from</span> <span class="nn">apache_beam.runners.dataflow.native_io</span> <span class="kn">import</span> <span class="n">iobase</span> <span class="k">as</span> <span class="n">dataflow_io</span> |
| <span class="kn">from</span> <span class="nn">apache_beam.transforms</span> <span class="kn">import</span> <span class="n">Flatten</span> |
| <span class="kn">from</span> <span class="nn">apache_beam.transforms</span> <span class="kn">import</span> <span class="n">Map</span> |
| <span class="kn">from</span> <span class="nn">apache_beam.transforms</span> <span class="kn">import</span> <span class="n">PTransform</span> |
| <span class="kn">from</span> <span class="nn">apache_beam.transforms.display</span> <span class="kn">import</span> <span class="n">DisplayDataItem</span> |
| <span class="kn">from</span> <span class="nn">apache_beam.utils.annotations</span> <span class="kn">import</span> <span class="n">deprecated</span> |
| |
| <span class="k">try</span><span class="p">:</span> |
| <span class="kn">from</span> <span class="nn">google.cloud</span> <span class="kn">import</span> <span class="n">pubsub</span> |
| <span class="k">except</span> <span class="ne">ImportError</span><span class="p">:</span> |
| <span class="n">pubsub</span> <span class="o">=</span> <span class="kc">None</span> |
| |
| <span class="n">__all__</span> <span class="o">=</span> <span class="p">[</span> |
| <span class="s1">'MultipleReadFromPubSub'</span><span class="p">,</span> |
| <span class="s1">'PubsubMessage'</span><span class="p">,</span> |
| <span class="s1">'PubSubSourceDescriptor'</span><span class="p">,</span> |
| <span class="s1">'ReadFromPubSub'</span><span class="p">,</span> |
| <span class="s1">'ReadStringsFromPubSub'</span><span class="p">,</span> |
| <span class="s1">'WriteStringsToPubSub'</span><span class="p">,</span> |
| <span class="s1">'WriteToPubSub'</span> |
| <span class="p">]</span> |
| |
| |
| <div class="viewcode-block" id="PubsubMessage"><a class="viewcode-back" href="../../../../apache_beam.io.gcp.pubsub.html#apache_beam.io.gcp.pubsub.PubsubMessage">[docs]</a><span class="k">class</span> <span class="nc">PubsubMessage</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span> |
| <span class="sd">"""Represents a Cloud Pub/Sub message.</span> |
| |
| <span class="sd"> Message payload includes the data and attributes fields. For the payload to be</span> |
| <span class="sd"> valid, at least one of its fields must be non-empty.</span> |
| |
| <span class="sd"> Attributes:</span> |
| <span class="sd"> data: (bytes) Message data. May be None.</span> |
| <span class="sd"> attributes: (dict) Key-value map of str to str, containing both user-defined</span> |
| <span class="sd"> and service generated attributes (such as id_label and</span> |
| <span class="sd"> timestamp_attribute). May be None.</span> |
| <span class="sd"> message_id: (str) ID of the message, assigned by the pubsub service when the</span> |
| <span class="sd"> message is published. Guaranteed to be unique within the topic. Will be</span> |
| <span class="sd"> reset to None if the message is being written to pubsub.</span> |
| <span class="sd"> publish_time: (datetime) Time at which the message was published. Will be</span> |
| <span class="sd"> reset to None if the Message is being written to pubsub.</span> |
| <span class="sd"> ordering_key: (str) If non-empty, identifies related messages for which</span> |
| <span class="sd"> publish order is respected by the PubSub subscription.</span> |
| <span class="sd"> """</span> |
| <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span> |
| <span class="bp">self</span><span class="p">,</span> |
| <span class="n">data</span><span class="p">,</span> |
| <span class="n">attributes</span><span class="p">,</span> |
| <span class="n">message_id</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> |
| <span class="n">publish_time</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> |
| <span class="n">ordering_key</span><span class="o">=</span><span class="s2">""</span><span class="p">):</span> |
| <span class="k">if</span> <span class="n">data</span> <span class="ow">is</span> <span class="kc">None</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">attributes</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span> |
| <span class="s1">'Either data (</span><span class="si">%r</span><span class="s1">) or attributes (</span><span class="si">%r</span><span class="s1">) must be set.'</span><span class="p">,</span> <span class="n">data</span><span class="p">,</span> <span class="n">attributes</span><span class="p">)</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">data</span> <span class="o">=</span> <span class="n">data</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">attributes</span> <span class="o">=</span> <span class="n">attributes</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">message_id</span> <span class="o">=</span> <span class="n">message_id</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">publish_time</span> <span class="o">=</span> <span class="n">publish_time</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">ordering_key</span> <span class="o">=</span> <span class="n">ordering_key</span> |
| |
| <span class="k">def</span> <span class="fm">__hash__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="k">return</span> <span class="nb">hash</span><span class="p">((</span><span class="bp">self</span><span class="o">.</span><span class="n">data</span><span class="p">,</span> <span class="nb">frozenset</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">attributes</span><span class="o">.</span><span class="n">items</span><span class="p">())))</span> |
| |
| <span class="k">def</span> <span class="fm">__eq__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">other</span><span class="p">):</span> |
| <span class="k">return</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">other</span><span class="p">,</span> <span class="n">PubsubMessage</span><span class="p">)</span> <span class="ow">and</span> <span class="p">(</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">data</span> <span class="o">==</span> <span class="n">other</span><span class="o">.</span><span class="n">data</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">attributes</span> <span class="o">==</span> <span class="n">other</span><span class="o">.</span><span class="n">attributes</span><span class="p">)</span> |
| |
| <span class="k">def</span> <span class="fm">__repr__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="k">return</span> <span class="s1">'PubsubMessage(</span><span class="si">%s</span><span class="s1">, </span><span class="si">%s</span><span class="s1">)'</span> <span class="o">%</span> <span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">data</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">attributes</span><span class="p">)</span> |
| |
| <span class="nd">@staticmethod</span> |
| <span class="k">def</span> <span class="nf">_from_proto_str</span><span class="p">(</span><span class="n">proto_msg</span><span class="p">):</span> |
| <span class="c1"># type: (bytes) -> PubsubMessage</span> |
| |
| <span class="sd">"""Construct from serialized form of ``PubsubMessage``.</span> |
| |
| <span class="sd"> Args:</span> |
| <span class="sd"> proto_msg: String containing a serialized protobuf of type</span> |
| <span class="sd"> https://cloud.google.com/pubsub/docs/reference/rpc/google.pubsub.v1#google.pubsub.v1.PubsubMessage</span> |
| |
| <span class="sd"> Returns:</span> |
| <span class="sd"> A new PubsubMessage object.</span> |
| <span class="sd"> """</span> |
| <span class="n">msg</span> <span class="o">=</span> <span class="n">pubsub</span><span class="o">.</span><span class="n">types</span><span class="o">.</span><span class="n">PubsubMessage</span><span class="o">.</span><span class="n">deserialize</span><span class="p">(</span><span class="n">proto_msg</span><span class="p">)</span> |
| <span class="c1"># Convert ScalarMapContainer to dict.</span> |
| <span class="n">attributes</span> <span class="o">=</span> <span class="nb">dict</span><span class="p">((</span><span class="n">key</span><span class="p">,</span> <span class="n">msg</span><span class="o">.</span><span class="n">attributes</span><span class="p">[</span><span class="n">key</span><span class="p">])</span> <span class="k">for</span> <span class="n">key</span> <span class="ow">in</span> <span class="n">msg</span><span class="o">.</span><span class="n">attributes</span><span class="p">)</span> |
| <span class="k">return</span> <span class="n">PubsubMessage</span><span class="p">(</span> |
| <span class="n">msg</span><span class="o">.</span><span class="n">data</span><span class="p">,</span> |
| <span class="n">attributes</span><span class="p">,</span> |
| <span class="n">msg</span><span class="o">.</span><span class="n">message_id</span><span class="p">,</span> |
| <span class="n">msg</span><span class="o">.</span><span class="n">publish_time</span><span class="p">,</span> |
| <span class="n">msg</span><span class="o">.</span><span class="n">ordering_key</span><span class="p">)</span> |
| |
| <span class="k">def</span> <span class="nf">_to_proto_str</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">for_publish</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span> |
| <span class="sd">"""Get serialized form of ``PubsubMessage``.</span> |
| |
| <span class="sd"> Args:</span> |
| <span class="sd"> proto_msg: str containing a serialized protobuf.</span> |
| <span class="sd"> for_publish: bool, if True strip out message fields which cannot be</span> |
| <span class="sd"> published (currently message_id and publish_time) per</span> |
| <span class="sd"> https://cloud.google.com/pubsub/docs/reference/rpc/google.pubsub.v1#pubsubmessage</span> |
| |
| <span class="sd"> Returns:</span> |
| <span class="sd"> A str containing a serialized protobuf of type</span> |
| <span class="sd"> https://cloud.google.com/pubsub/docs/reference/rpc/google.pubsub.v1#google.pubsub.v1.PubsubMessage</span> |
| <span class="sd"> containing the payload of this object.</span> |
| <span class="sd"> """</span> |
| <span class="n">msg</span> <span class="o">=</span> <span class="n">pubsub</span><span class="o">.</span><span class="n">types</span><span class="o">.</span><span class="n">PubsubMessage</span><span class="p">()</span> |
| <span class="n">msg</span><span class="o">.</span><span class="n">data</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">data</span> |
| <span class="k">for</span> <span class="n">key</span><span class="p">,</span> <span class="n">value</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">attributes</span><span class="o">.</span><span class="n">items</span><span class="p">():</span> |
| <span class="n">msg</span><span class="o">.</span><span class="n">attributes</span><span class="p">[</span><span class="n">key</span><span class="p">]</span> <span class="o">=</span> <span class="n">value</span> |
| <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">message_id</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">for_publish</span><span class="p">:</span> |
| <span class="n">msg</span><span class="o">.</span><span class="n">message_id</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">message_id</span> |
| <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">publish_time</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">for_publish</span><span class="p">:</span> |
| <span class="n">msg</span><span class="o">.</span><span class="n">publish_time</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">publish_time</span> |
| <span class="n">msg</span><span class="o">.</span><span class="n">ordering_key</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">ordering_key</span> |
| <span class="k">return</span> <span class="n">pubsub</span><span class="o">.</span><span class="n">types</span><span class="o">.</span><span class="n">PubsubMessage</span><span class="o">.</span><span class="n">serialize</span><span class="p">(</span><span class="n">msg</span><span class="p">)</span> |
| |
| <span class="nd">@staticmethod</span> |
| <span class="k">def</span> <span class="nf">_from_message</span><span class="p">(</span><span class="n">msg</span><span class="p">):</span> |
| <span class="c1"># type: (Any) -> PubsubMessage</span> |
| |
| <span class="sd">"""Construct from ``google.cloud.pubsub_v1.subscriber.message.Message``.</span> |
| |
| <span class="sd"> https://googleapis.github.io/google-cloud-python/latest/pubsub/subscriber/api/message.html</span> |
| <span class="sd"> """</span> |
| <span class="c1"># Convert ScalarMapContainer to dict.</span> |
| <span class="n">attributes</span> <span class="o">=</span> <span class="nb">dict</span><span class="p">((</span><span class="n">key</span><span class="p">,</span> <span class="n">msg</span><span class="o">.</span><span class="n">attributes</span><span class="p">[</span><span class="n">key</span><span class="p">])</span> <span class="k">for</span> <span class="n">key</span> <span class="ow">in</span> <span class="n">msg</span><span class="o">.</span><span class="n">attributes</span><span class="p">)</span> |
| <span class="n">pubsubmessage</span> <span class="o">=</span> <span class="n">PubsubMessage</span><span class="p">(</span><span class="n">msg</span><span class="o">.</span><span class="n">data</span><span class="p">,</span> <span class="n">attributes</span><span class="p">)</span> |
| <span class="k">if</span> <span class="n">msg</span><span class="o">.</span><span class="n">message_id</span><span class="p">:</span> |
| <span class="n">pubsubmessage</span><span class="o">.</span><span class="n">message_id</span> <span class="o">=</span> <span class="n">msg</span><span class="o">.</span><span class="n">message_id</span> |
| <span class="k">if</span> <span class="n">msg</span><span class="o">.</span><span class="n">publish_time</span><span class="p">:</span> |
| <span class="n">pubsubmessage</span><span class="o">.</span><span class="n">publish_time</span> <span class="o">=</span> <span class="n">msg</span><span class="o">.</span><span class="n">publish_time</span> |
| <span class="k">if</span> <span class="n">msg</span><span class="o">.</span><span class="n">ordering_key</span><span class="p">:</span> |
| <span class="n">pubsubmessage</span><span class="o">.</span><span class="n">ordering_key</span> <span class="o">=</span> <span class="n">msg</span><span class="o">.</span><span class="n">ordering_key</span> |
| <span class="k">return</span> <span class="n">pubsubmessage</span></div> |
| |
| |
| <div class="viewcode-block" id="ReadFromPubSub"><a class="viewcode-back" href="../../../../apache_beam.io.gcp.pubsub.html#apache_beam.io.gcp.pubsub.ReadFromPubSub">[docs]</a><span class="k">class</span> <span class="nc">ReadFromPubSub</span><span class="p">(</span><span class="n">PTransform</span><span class="p">):</span> |
| <span class="sd">"""A ``PTransform`` for reading from Cloud Pub/Sub."""</span> |
| |
| <span class="c1"># Implementation note: This ``PTransform`` is overridden by Directrunner.</span> |
| |
| <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span> |
| <span class="bp">self</span><span class="p">,</span> |
| <span class="n">topic</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="c1"># type: Optional[str]</span> |
| <span class="n">subscription</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="c1"># type: Optional[str]</span> |
| <span class="n">id_label</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="c1"># type: Optional[str]</span> |
| <span class="n">with_attributes</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> <span class="c1"># type: bool</span> |
| <span class="n">timestamp_attribute</span><span class="o">=</span><span class="kc">None</span> <span class="c1"># type: Optional[str]</span> |
| <span class="p">):</span> |
| <span class="c1"># type: (...) -> None</span> |
| |
| <span class="sd">"""Initializes ``ReadFromPubSub``.</span> |
| |
| <span class="sd"> Args:</span> |
| <span class="sd"> topic: Cloud Pub/Sub topic in the form</span> |
| <span class="sd"> "projects/<project>/topics/<topic>". If provided, subscription must be</span> |
| <span class="sd"> None.</span> |
| <span class="sd"> subscription: Existing Cloud Pub/Sub subscription to use in the</span> |
| <span class="sd"> form "projects/<project>/subscriptions/<subscription>". If not</span> |
| <span class="sd"> specified, a temporary subscription will be created from the specified</span> |
| <span class="sd"> topic. If provided, topic must be None.</span> |
| <span class="sd"> id_label: The attribute on incoming Pub/Sub messages to use as a unique</span> |
| <span class="sd"> record identifier. When specified, the value of this attribute (which</span> |
| <span class="sd"> can be any string that uniquely identifies the record) will be used for</span> |
| <span class="sd"> deduplication of messages. If not provided, we cannot guarantee</span> |
| <span class="sd"> that no duplicate data will be delivered on the Pub/Sub stream. In this</span> |
| <span class="sd"> case, deduplication of the stream will be strictly best effort.</span> |
| <span class="sd"> with_attributes:</span> |
| <span class="sd"> True - output elements will be :class:`~PubsubMessage` objects.</span> |
| <span class="sd"> False - output elements will be of type ``bytes`` (message</span> |
| <span class="sd"> data only).</span> |
| <span class="sd"> timestamp_attribute: Message value to use as element timestamp. If None,</span> |
| <span class="sd"> uses message publishing time as the timestamp.</span> |
| |
| <span class="sd"> Timestamp values should be in one of two formats:</span> |
| |
| <span class="sd"> - A numerical value representing the number of milliseconds since the</span> |
| <span class="sd"> Unix epoch.</span> |
| <span class="sd"> - A string in RFC 3339 format, UTC timezone. Example:</span> |
| <span class="sd"> ``2015-10-29T23:41:41.123Z``. The sub-second component of the</span> |
| <span class="sd"> timestamp is optional, and digits beyond the first three (i.e., time</span> |
| <span class="sd"> units smaller than milliseconds) may be ignored.</span> |
| <span class="sd"> """</span> |
| <span class="nb">super</span><span class="p">()</span><span class="o">.</span><span class="fm">__init__</span><span class="p">()</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">with_attributes</span> <span class="o">=</span> <span class="n">with_attributes</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_source</span> <span class="o">=</span> <span class="n">_PubSubSource</span><span class="p">(</span> |
| <span class="n">topic</span><span class="o">=</span><span class="n">topic</span><span class="p">,</span> |
| <span class="n">subscription</span><span class="o">=</span><span class="n">subscription</span><span class="p">,</span> |
| <span class="n">id_label</span><span class="o">=</span><span class="n">id_label</span><span class="p">,</span> |
| <span class="n">with_attributes</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">with_attributes</span><span class="p">,</span> |
| <span class="n">timestamp_attribute</span><span class="o">=</span><span class="n">timestamp_attribute</span><span class="p">)</span> |
| |
| <div class="viewcode-block" id="ReadFromPubSub.expand"><a class="viewcode-back" href="../../../../apache_beam.io.gcp.pubsub.html#apache_beam.io.gcp.pubsub.ReadFromPubSub.expand">[docs]</a> <span class="k">def</span> <span class="nf">expand</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">pvalue</span><span class="p">):</span> |
| <span class="n">pcoll</span> <span class="o">=</span> <span class="n">pvalue</span><span class="o">.</span><span class="n">pipeline</span> <span class="o">|</span> <span class="n">Read</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_source</span><span class="p">)</span> |
| <span class="n">pcoll</span><span class="o">.</span><span class="n">element_type</span> <span class="o">=</span> <span class="nb">bytes</span> |
| <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">with_attributes</span><span class="p">:</span> |
| <span class="n">pcoll</span> <span class="o">=</span> <span class="n">pcoll</span> <span class="o">|</span> <span class="n">Map</span><span class="p">(</span><span class="n">PubsubMessage</span><span class="o">.</span><span class="n">_from_proto_str</span><span class="p">)</span> |
| <span class="n">pcoll</span><span class="o">.</span><span class="n">element_type</span> <span class="o">=</span> <span class="n">PubsubMessage</span> |
| <span class="k">return</span> <span class="n">pcoll</span></div> |
| |
| <div class="viewcode-block" id="ReadFromPubSub.to_runner_api_parameter"><a class="viewcode-back" href="../../../../apache_beam.io.gcp.pubsub.html#apache_beam.io.gcp.pubsub.ReadFromPubSub.to_runner_api_parameter">[docs]</a> <span class="k">def</span> <span class="nf">to_runner_api_parameter</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">context</span><span class="p">):</span> |
| <span class="c1"># Required as this is identified by type in PTransformOverrides.</span> |
| <span class="c1"># TODO(BEAM-3812): Use an actual URN here.</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">to_runner_api_pickled</span><span class="p">(</span><span class="n">context</span><span class="p">)</span></div></div> |
| |
| |
| <div class="viewcode-block" id="ReadStringsFromPubSub"><a class="viewcode-back" href="../../../../apache_beam.io.gcp.pubsub.html#apache_beam.io.gcp.pubsub.ReadStringsFromPubSub">[docs]</a><span class="nd">@deprecated</span><span class="p">(</span><span class="n">since</span><span class="o">=</span><span class="s1">'2.7.0'</span><span class="p">,</span> <span class="n">extra_message</span><span class="o">=</span><span class="s1">'Use ReadFromPubSub instead.'</span><span class="p">)</span> |
| <span class="k">def</span> <span class="nf">ReadStringsFromPubSub</span><span class="p">(</span><span class="n">topic</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">subscription</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">id_label</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span> |
| <span class="k">return</span> <span class="n">_ReadStringsFromPubSub</span><span class="p">(</span><span class="n">topic</span><span class="p">,</span> <span class="n">subscription</span><span class="p">,</span> <span class="n">id_label</span><span class="p">)</span></div> |
| |
| |
| <span class="k">class</span> <span class="nc">_ReadStringsFromPubSub</span><span class="p">(</span><span class="n">PTransform</span><span class="p">):</span> |
| <span class="sd">"""This class is deprecated. Use ``ReadFromPubSub`` instead."""</span> |
| <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">topic</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">subscription</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">id_label</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span> |
| <span class="nb">super</span><span class="p">()</span><span class="o">.</span><span class="fm">__init__</span><span class="p">()</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">topic</span> <span class="o">=</span> <span class="n">topic</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">subscription</span> <span class="o">=</span> <span class="n">subscription</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">id_label</span> <span class="o">=</span> <span class="n">id_label</span> |
| |
| <span class="k">def</span> <span class="nf">expand</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">pvalue</span><span class="p">):</span> |
| <span class="n">p</span> <span class="o">=</span> <span class="p">(</span> |
| <span class="n">pvalue</span><span class="o">.</span><span class="n">pipeline</span> |
| <span class="o">|</span> <span class="n">ReadFromPubSub</span><span class="p">(</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">topic</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">subscription</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">id_label</span><span class="p">,</span> <span class="n">with_attributes</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> |
| <span class="o">|</span> <span class="s1">'DecodeString'</span> <span class="o">>></span> <span class="n">Map</span><span class="p">(</span><span class="k">lambda</span> <span class="n">b</span><span class="p">:</span> <span class="n">b</span><span class="o">.</span><span class="n">decode</span><span class="p">(</span><span class="s1">'utf-8'</span><span class="p">)))</span> |
| <span class="n">p</span><span class="o">.</span><span class="n">element_type</span> <span class="o">=</span> <span class="nb">str</span> |
| <span class="k">return</span> <span class="n">p</span> |
| |
| |
| <div class="viewcode-block" id="WriteStringsToPubSub"><a class="viewcode-back" href="../../../../apache_beam.io.gcp.pubsub.html#apache_beam.io.gcp.pubsub.WriteStringsToPubSub">[docs]</a><span class="nd">@deprecated</span><span class="p">(</span><span class="n">since</span><span class="o">=</span><span class="s1">'2.7.0'</span><span class="p">,</span> <span class="n">extra_message</span><span class="o">=</span><span class="s1">'Use WriteToPubSub instead.'</span><span class="p">)</span> |
| <span class="k">def</span> <span class="nf">WriteStringsToPubSub</span><span class="p">(</span><span class="n">topic</span><span class="p">):</span> |
| <span class="k">return</span> <span class="n">_WriteStringsToPubSub</span><span class="p">(</span><span class="n">topic</span><span class="p">)</span></div> |
| |
| |
| <span class="k">class</span> <span class="nc">_WriteStringsToPubSub</span><span class="p">(</span><span class="n">PTransform</span><span class="p">):</span> |
| <span class="sd">"""This class is deprecated. Use ``WriteToPubSub`` instead."""</span> |
| <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">topic</span><span class="p">):</span> |
| <span class="sd">"""Initializes ``_WriteStringsToPubSub``.</span> |
| |
| <span class="sd"> Attributes:</span> |
| <span class="sd"> topic: Cloud Pub/Sub topic in the form "/topics/<project>/<topic>".</span> |
| <span class="sd"> """</span> |
| <span class="nb">super</span><span class="p">()</span><span class="o">.</span><span class="fm">__init__</span><span class="p">()</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">topic</span> <span class="o">=</span> <span class="n">topic</span> |
| |
| <span class="k">def</span> <span class="nf">expand</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">pcoll</span><span class="p">):</span> |
| <span class="n">pcoll</span> <span class="o">=</span> <span class="n">pcoll</span> <span class="o">|</span> <span class="s1">'EncodeString'</span> <span class="o">>></span> <span class="n">Map</span><span class="p">(</span><span class="k">lambda</span> <span class="n">s</span><span class="p">:</span> <span class="n">s</span><span class="o">.</span><span class="n">encode</span><span class="p">(</span><span class="s1">'utf-8'</span><span class="p">))</span> |
| <span class="n">pcoll</span><span class="o">.</span><span class="n">element_type</span> <span class="o">=</span> <span class="nb">bytes</span> |
| <span class="k">return</span> <span class="n">pcoll</span> <span class="o">|</span> <span class="n">WriteToPubSub</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">topic</span><span class="p">)</span> |
| |
| |
| <div class="viewcode-block" id="WriteToPubSub"><a class="viewcode-back" href="../../../../apache_beam.io.gcp.pubsub.html#apache_beam.io.gcp.pubsub.WriteToPubSub">[docs]</a><span class="k">class</span> <span class="nc">WriteToPubSub</span><span class="p">(</span><span class="n">PTransform</span><span class="p">):</span> |
| <span class="sd">"""A ``PTransform`` for writing messages to Cloud Pub/Sub."""</span> |
| |
| <span class="c1"># Implementation note: This ``PTransform`` is overridden by Directrunner.</span> |
| |
| <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span> |
| <span class="bp">self</span><span class="p">,</span> |
| <span class="n">topic</span><span class="p">,</span> <span class="c1"># type: str</span> |
| <span class="n">with_attributes</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> <span class="c1"># type: bool</span> |
| <span class="n">id_label</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="c1"># type: Optional[str]</span> |
| <span class="n">timestamp_attribute</span><span class="o">=</span><span class="kc">None</span> <span class="c1"># type: Optional[str]</span> |
| <span class="p">):</span> |
| <span class="c1"># type: (...) -> None</span> |
| |
| <span class="sd">"""Initializes ``WriteToPubSub``.</span> |
| |
| <span class="sd"> Args:</span> |
| <span class="sd"> topic: Cloud Pub/Sub topic in the form "/topics/<project>/<topic>".</span> |
| <span class="sd"> with_attributes:</span> |
| <span class="sd"> True - input elements will be :class:`~PubsubMessage` objects.</span> |
| <span class="sd"> False - input elements will be of type ``bytes`` (message</span> |
| <span class="sd"> data only).</span> |
| <span class="sd"> id_label: If set, will set an attribute for each Cloud Pub/Sub message</span> |
| <span class="sd"> with the given name and a unique value. This attribute can then be used</span> |
| <span class="sd"> in a ReadFromPubSub PTransform to deduplicate messages.</span> |
| <span class="sd"> timestamp_attribute: If set, will set an attribute for each Cloud Pub/Sub</span> |
| <span class="sd"> message with the given name and the message's publish time as the value.</span> |
| <span class="sd"> """</span> |
| <span class="nb">super</span><span class="p">()</span><span class="o">.</span><span class="fm">__init__</span><span class="p">()</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">with_attributes</span> <span class="o">=</span> <span class="n">with_attributes</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">id_label</span> <span class="o">=</span> <span class="n">id_label</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">timestamp_attribute</span> <span class="o">=</span> <span class="n">timestamp_attribute</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">project</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">topic_name</span> <span class="o">=</span> <span class="n">parse_topic</span><span class="p">(</span><span class="n">topic</span><span class="p">)</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">full_topic</span> <span class="o">=</span> <span class="n">topic</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_sink</span> <span class="o">=</span> <span class="n">_PubSubSink</span><span class="p">(</span><span class="n">topic</span><span class="p">,</span> <span class="n">id_label</span><span class="p">,</span> <span class="n">timestamp_attribute</span><span class="p">)</span> |
| |
| <div class="viewcode-block" id="WriteToPubSub.message_to_proto_str"><a class="viewcode-back" href="../../../../apache_beam.io.gcp.pubsub.html#apache_beam.io.gcp.pubsub.WriteToPubSub.message_to_proto_str">[docs]</a> <span class="nd">@staticmethod</span> |
| <span class="k">def</span> <span class="nf">message_to_proto_str</span><span class="p">(</span><span class="n">element</span><span class="p">):</span> |
| <span class="c1"># type: (PubsubMessage) -> bytes</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">element</span><span class="p">,</span> <span class="n">PubsubMessage</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="ne">TypeError</span><span class="p">(</span> |
| <span class="s1">'Unexpected element. Type: </span><span class="si">%s</span><span class="s1"> (expected: PubsubMessage), '</span> |
| <span class="s1">'value: </span><span class="si">%r</span><span class="s1">'</span> <span class="o">%</span> <span class="p">(</span><span class="nb">type</span><span class="p">(</span><span class="n">element</span><span class="p">),</span> <span class="n">element</span><span class="p">))</span> |
| <span class="k">return</span> <span class="n">element</span><span class="o">.</span><span class="n">_to_proto_str</span><span class="p">(</span><span class="n">for_publish</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span></div> |
| |
| <div class="viewcode-block" id="WriteToPubSub.bytes_to_proto_str"><a class="viewcode-back" href="../../../../apache_beam.io.gcp.pubsub.html#apache_beam.io.gcp.pubsub.WriteToPubSub.bytes_to_proto_str">[docs]</a> <span class="nd">@staticmethod</span> |
| <span class="k">def</span> <span class="nf">bytes_to_proto_str</span><span class="p">(</span><span class="n">element</span><span class="p">):</span> |
| <span class="c1"># type: (bytes) -> bytes</span> |
| <span class="n">msg</span> <span class="o">=</span> <span class="n">pubsub</span><span class="o">.</span><span class="n">types</span><span class="o">.</span><span class="n">PubsubMessage</span><span class="p">()</span> |
| <span class="n">msg</span><span class="o">.</span><span class="n">data</span> <span class="o">=</span> <span class="n">element</span> |
| <span class="k">return</span> <span class="n">pubsub</span><span class="o">.</span><span class="n">types</span><span class="o">.</span><span class="n">PubsubMessage</span><span class="o">.</span><span class="n">serialize</span><span class="p">(</span><span class="n">msg</span><span class="p">)</span></div> |
| |
| <div class="viewcode-block" id="WriteToPubSub.expand"><a class="viewcode-back" href="../../../../apache_beam.io.gcp.pubsub.html#apache_beam.io.gcp.pubsub.WriteToPubSub.expand">[docs]</a> <span class="k">def</span> <span class="nf">expand</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">pcoll</span><span class="p">):</span> |
| <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">with_attributes</span><span class="p">:</span> |
| <span class="n">pcoll</span> <span class="o">=</span> <span class="n">pcoll</span> <span class="o">|</span> <span class="s1">'ToProtobuf'</span> <span class="o">>></span> <span class="n">Map</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">message_to_proto_str</span><span class="p">)</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="n">pcoll</span> <span class="o">=</span> <span class="n">pcoll</span> <span class="o">|</span> <span class="s1">'ToProtobuf'</span> <span class="o">>></span> <span class="n">Map</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">bytes_to_proto_str</span><span class="p">)</span> |
| <span class="n">pcoll</span><span class="o">.</span><span class="n">element_type</span> <span class="o">=</span> <span class="nb">bytes</span> |
| <span class="k">return</span> <span class="n">pcoll</span> <span class="o">|</span> <span class="n">Write</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_sink</span><span class="p">)</span></div> |
| |
| <div class="viewcode-block" id="WriteToPubSub.to_runner_api_parameter"><a class="viewcode-back" href="../../../../apache_beam.io.gcp.pubsub.html#apache_beam.io.gcp.pubsub.WriteToPubSub.to_runner_api_parameter">[docs]</a> <span class="k">def</span> <span class="nf">to_runner_api_parameter</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">context</span><span class="p">):</span> |
| <span class="c1"># Required as this is identified by type in PTransformOverrides.</span> |
| <span class="c1"># TODO(BEAM-3812): Use an actual URN here.</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">to_runner_api_pickled</span><span class="p">(</span><span class="n">context</span><span class="p">)</span></div> |
| |
| <div class="viewcode-block" id="WriteToPubSub.display_data"><a class="viewcode-back" href="../../../../apache_beam.io.gcp.pubsub.html#apache_beam.io.gcp.pubsub.WriteToPubSub.display_data">[docs]</a> <span class="k">def</span> <span class="nf">display_data</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="k">return</span> <span class="p">{</span> |
| <span class="s1">'topic'</span><span class="p">:</span> <span class="n">DisplayDataItem</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">full_topic</span><span class="p">,</span> <span class="n">label</span><span class="o">=</span><span class="s1">'Pubsub Topic'</span><span class="p">),</span> |
| <span class="s1">'id_label'</span><span class="p">:</span> <span class="n">DisplayDataItem</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">id_label</span><span class="p">,</span> <span class="n">label</span><span class="o">=</span><span class="s1">'ID Label Attribute'</span><span class="p">),</span> |
| <span class="s1">'with_attributes'</span><span class="p">:</span> <span class="n">DisplayDataItem</span><span class="p">(</span> |
| <span class="kc">True</span><span class="p">,</span> <span class="n">label</span><span class="o">=</span><span class="s1">'With Attributes'</span><span class="p">)</span><span class="o">.</span><span class="n">drop_if_none</span><span class="p">(),</span> |
| <span class="s1">'timestamp_attribute'</span><span class="p">:</span> <span class="n">DisplayDataItem</span><span class="p">(</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">timestamp_attribute</span><span class="p">,</span> <span class="n">label</span><span class="o">=</span><span class="s1">'Timestamp Attribute'</span><span class="p">),</span> |
| <span class="p">}</span></div></div> |
| |
| |
| <span class="n">PROJECT_ID_REGEXP</span> <span class="o">=</span> <span class="s1">'[a-z][-a-z0-9:.]{4,61}[a-z0-9]'</span> |
| <span class="n">SUBSCRIPTION_REGEXP</span> <span class="o">=</span> <span class="s1">'projects/([^/]+)/subscriptions/(.+)'</span> |
| <span class="n">TOPIC_REGEXP</span> <span class="o">=</span> <span class="s1">'projects/([^/]+)/topics/(.+)'</span> |
| |
| |
| <span class="k">def</span> <span class="nf">parse_topic</span><span class="p">(</span><span class="n">full_topic</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-></span> <span class="n">Tuple</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="nb">str</span><span class="p">]:</span> |
| <span class="n">match</span> <span class="o">=</span> <span class="n">re</span><span class="o">.</span><span class="n">match</span><span class="p">(</span><span class="n">TOPIC_REGEXP</span><span class="p">,</span> <span class="n">full_topic</span><span class="p">)</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="n">match</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span> |
| <span class="s1">'PubSub topic must be in the form "projects/<project>/topics'</span> |
| <span class="s1">'/<topic>" (got </span><span class="si">%r</span><span class="s1">).'</span> <span class="o">%</span> <span class="n">full_topic</span><span class="p">)</span> |
| <span class="n">project</span><span class="p">,</span> <span class="n">topic_name</span> <span class="o">=</span> <span class="n">match</span><span class="o">.</span><span class="n">group</span><span class="p">(</span><span class="mi">1</span><span class="p">),</span> <span class="n">match</span><span class="o">.</span><span class="n">group</span><span class="p">(</span><span class="mi">2</span><span class="p">)</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="n">re</span><span class="o">.</span><span class="n">match</span><span class="p">(</span><span class="n">PROJECT_ID_REGEXP</span><span class="p">,</span> <span class="n">project</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s1">'Invalid PubSub project name: </span><span class="si">%r</span><span class="s1">.'</span> <span class="o">%</span> <span class="n">project</span><span class="p">)</span> |
| <span class="k">return</span> <span class="n">project</span><span class="p">,</span> <span class="n">topic_name</span> |
| |
| |
| <span class="k">def</span> <span class="nf">parse_subscription</span><span class="p">(</span><span class="n">full_subscription</span><span class="p">):</span> |
| <span class="n">match</span> <span class="o">=</span> <span class="n">re</span><span class="o">.</span><span class="n">match</span><span class="p">(</span><span class="n">SUBSCRIPTION_REGEXP</span><span class="p">,</span> <span class="n">full_subscription</span><span class="p">)</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="n">match</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span> |
| <span class="s1">'PubSub subscription must be in the form "projects/<project>'</span> |
| <span class="s1">'/subscriptions/<subscription>" (got </span><span class="si">%r</span><span class="s1">).'</span> <span class="o">%</span> <span class="n">full_subscription</span><span class="p">)</span> |
| <span class="n">project</span><span class="p">,</span> <span class="n">subscription_name</span> <span class="o">=</span> <span class="n">match</span><span class="o">.</span><span class="n">group</span><span class="p">(</span><span class="mi">1</span><span class="p">),</span> <span class="n">match</span><span class="o">.</span><span class="n">group</span><span class="p">(</span><span class="mi">2</span><span class="p">)</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="n">re</span><span class="o">.</span><span class="n">match</span><span class="p">(</span><span class="n">PROJECT_ID_REGEXP</span><span class="p">,</span> <span class="n">project</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s1">'Invalid PubSub project name: </span><span class="si">%r</span><span class="s1">.'</span> <span class="o">%</span> <span class="n">project</span><span class="p">)</span> |
| <span class="k">return</span> <span class="n">project</span><span class="p">,</span> <span class="n">subscription_name</span> |
| |
| |
| <span class="k">class</span> <span class="nc">_PubSubSource</span><span class="p">(</span><span class="n">dataflow_io</span><span class="o">.</span><span class="n">NativeSource</span><span class="p">):</span> |
| <span class="sd">"""Source for a Cloud Pub/Sub topic or subscription.</span> |
| |
| <span class="sd"> This ``NativeSource`` is overridden by a native Pubsub implementation.</span> |
| |
| <span class="sd"> Attributes:</span> |
| <span class="sd"> with_attributes: If False, will fetch just message data. Otherwise,</span> |
| <span class="sd"> fetches ``PubsubMessage`` protobufs.</span> |
| <span class="sd"> """</span> |
| <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span> |
| <span class="bp">self</span><span class="p">,</span> |
| <span class="n">topic</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="c1"># type: Optional[str]</span> |
| <span class="n">subscription</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="c1"># type: Optional[str]</span> |
| <span class="n">id_label</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="c1"># type: Optional[str]</span> |
| <span class="n">with_attributes</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> <span class="c1"># type: bool</span> |
| <span class="n">timestamp_attribute</span><span class="o">=</span><span class="kc">None</span> <span class="c1"># type: Optional[str]</span> |
| <span class="p">):</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">coder</span> <span class="o">=</span> <span class="n">coders</span><span class="o">.</span><span class="n">BytesCoder</span><span class="p">()</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">full_topic</span> <span class="o">=</span> <span class="n">topic</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">full_subscription</span> <span class="o">=</span> <span class="n">subscription</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">topic_name</span> <span class="o">=</span> <span class="kc">None</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">subscription_name</span> <span class="o">=</span> <span class="kc">None</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">id_label</span> <span class="o">=</span> <span class="n">id_label</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">with_attributes</span> <span class="o">=</span> <span class="n">with_attributes</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">timestamp_attribute</span> <span class="o">=</span> <span class="n">timestamp_attribute</span> |
| |
| <span class="c1"># Perform some validation on the topic and subscription.</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="p">(</span><span class="n">topic</span> <span class="ow">or</span> <span class="n">subscription</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s1">'Either a topic or subscription must be provided.'</span><span class="p">)</span> |
| <span class="k">if</span> <span class="n">topic</span> <span class="ow">and</span> <span class="n">subscription</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s1">'Only one of topic or subscription should be provided.'</span><span class="p">)</span> |
| |
| <span class="k">if</span> <span class="n">topic</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">project</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">topic_name</span> <span class="o">=</span> <span class="n">parse_topic</span><span class="p">(</span><span class="n">topic</span><span class="p">)</span> |
| <span class="k">if</span> <span class="n">subscription</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">project</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">subscription_name</span> <span class="o">=</span> <span class="n">parse_subscription</span><span class="p">(</span><span class="n">subscription</span><span class="p">)</span> |
| |
| <span class="nd">@property</span> |
| <span class="k">def</span> <span class="nf">format</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="sd">"""Source format name required for remote execution."""</span> |
| <span class="k">return</span> <span class="s1">'pubsub'</span> |
| |
| <span class="k">def</span> <span class="nf">display_data</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="k">return</span> <span class="p">{</span> |
| <span class="s1">'id_label'</span><span class="p">:</span> <span class="n">DisplayDataItem</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">id_label</span><span class="p">,</span> |
| <span class="n">label</span><span class="o">=</span><span class="s1">'ID Label Attribute'</span><span class="p">)</span><span class="o">.</span><span class="n">drop_if_none</span><span class="p">(),</span> |
| <span class="s1">'topic'</span><span class="p">:</span> <span class="n">DisplayDataItem</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">full_topic</span><span class="p">,</span> |
| <span class="n">label</span><span class="o">=</span><span class="s1">'Pubsub Topic'</span><span class="p">)</span><span class="o">.</span><span class="n">drop_if_none</span><span class="p">(),</span> |
| <span class="s1">'subscription'</span><span class="p">:</span> <span class="n">DisplayDataItem</span><span class="p">(</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">full_subscription</span><span class="p">,</span> <span class="n">label</span><span class="o">=</span><span class="s1">'Pubsub Subscription'</span><span class="p">)</span><span class="o">.</span><span class="n">drop_if_none</span><span class="p">(),</span> |
| <span class="s1">'with_attributes'</span><span class="p">:</span> <span class="n">DisplayDataItem</span><span class="p">(</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">with_attributes</span><span class="p">,</span> <span class="n">label</span><span class="o">=</span><span class="s1">'With Attributes'</span><span class="p">)</span><span class="o">.</span><span class="n">drop_if_none</span><span class="p">(),</span> |
| <span class="s1">'timestamp_attribute'</span><span class="p">:</span> <span class="n">DisplayDataItem</span><span class="p">(</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">timestamp_attribute</span><span class="p">,</span> |
| <span class="n">label</span><span class="o">=</span><span class="s1">'Timestamp Attribute'</span><span class="p">)</span><span class="o">.</span><span class="n">drop_if_none</span><span class="p">(),</span> |
| <span class="p">}</span> |
| |
| <span class="k">def</span> <span class="nf">reader</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="ne">NotImplementedError</span> |
| |
| <span class="k">def</span> <span class="nf">is_bounded</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="k">return</span> <span class="kc">False</span> |
| |
| |
| <span class="k">class</span> <span class="nc">_PubSubSink</span><span class="p">(</span><span class="n">dataflow_io</span><span class="o">.</span><span class="n">NativeSink</span><span class="p">):</span> |
| <span class="sd">"""Sink for a Cloud Pub/Sub topic.</span> |
| |
| <span class="sd"> This ``NativeSource`` is overridden by a native Pubsub implementation.</span> |
| <span class="sd"> """</span> |
| <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span> |
| <span class="bp">self</span><span class="p">,</span> |
| <span class="n">topic</span><span class="p">:</span> <span class="nb">str</span><span class="p">,</span> |
| <span class="n">id_label</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="nb">str</span><span class="p">],</span> |
| <span class="n">timestamp_attribute</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="nb">str</span><span class="p">],</span> |
| <span class="p">):</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">coder</span> <span class="o">=</span> <span class="n">coders</span><span class="o">.</span><span class="n">BytesCoder</span><span class="p">()</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">full_topic</span> <span class="o">=</span> <span class="n">topic</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">id_label</span> <span class="o">=</span> <span class="n">id_label</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">timestamp_attribute</span> <span class="o">=</span> <span class="n">timestamp_attribute</span> |
| |
| <span class="bp">self</span><span class="o">.</span><span class="n">project</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">topic_name</span> <span class="o">=</span> <span class="n">parse_topic</span><span class="p">(</span><span class="n">topic</span><span class="p">)</span> |
| |
| <span class="nd">@property</span> |
| <span class="k">def</span> <span class="nf">format</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="sd">"""Sink format name required for remote execution."""</span> |
| <span class="k">return</span> <span class="s1">'pubsub'</span> |
| |
| <span class="k">def</span> <span class="nf">writer</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="ne">NotImplementedError</span> |
| |
| |
| <div class="viewcode-block" id="PubSubSourceDescriptor"><a class="viewcode-back" href="../../../../apache_beam.io.gcp.pubsub.html#apache_beam.io.gcp.pubsub.PubSubSourceDescriptor">[docs]</a><span class="k">class</span> <span class="nc">PubSubSourceDescriptor</span><span class="p">(</span><span class="n">NamedTuple</span><span class="p">):</span> |
| <span class="sd">"""A PubSub source descriptor for ``MultipleReadFromPubSub```</span> |
| |
| <span class="sd"> Attributes:</span> |
| <span class="sd"> source: Existing Cloud Pub/Sub topic or subscription to use in the</span> |
| <span class="sd"> form "projects/<project>/topics/<topic>" or</span> |
| <span class="sd"> "projects/<project>/subscriptions/<subscription>"</span> |
| <span class="sd"> id_label: The attribute on incoming Pub/Sub messages to use as a unique</span> |
| <span class="sd"> record identifier. When specified, the value of this attribute (which</span> |
| <span class="sd"> can be any string that uniquely identifies the record) will be used for</span> |
| <span class="sd"> deduplication of messages. If not provided, we cannot guarantee</span> |
| <span class="sd"> that no duplicate data will be delivered on the Pub/Sub stream. In this</span> |
| <span class="sd"> case, deduplication of the stream will be strictly best effort.</span> |
| <span class="sd"> timestamp_attribute: Message value to use as element timestamp. If None,</span> |
| <span class="sd"> uses message publishing time as the timestamp.</span> |
| |
| <span class="sd"> Timestamp values should be in one of two formats:</span> |
| |
| <span class="sd"> - A numerical value representing the number of milliseconds since the</span> |
| <span class="sd"> Unix epoch.</span> |
| <span class="sd"> - A string in RFC 3339 format, UTC timezone. Example:</span> |
| <span class="sd"> ``2015-10-29T23:41:41.123Z``. The sub-second component of the</span> |
| <span class="sd"> timestamp is optional, and digits beyond the first three (i.e., time</span> |
| <span class="sd"> units smaller than milliseconds) may be ignored.</span> |
| <span class="sd"> """</span> |
| <span class="n">source</span><span class="p">:</span> <span class="nb">str</span> |
| <span class="n">id_label</span><span class="p">:</span> <span class="nb">str</span> <span class="o">=</span> <span class="kc">None</span> |
| <span class="n">timestamp_attribute</span><span class="p">:</span> <span class="nb">str</span> <span class="o">=</span> <span class="kc">None</span></div> |
| |
| |
| <span class="n">PUBSUB_DESCRIPTOR_REGEXP</span> <span class="o">=</span> <span class="s1">'projects/([^/]+)/(topics|subscriptions)/(.+)'</span> |
| |
| |
| <div class="viewcode-block" id="MultipleReadFromPubSub"><a class="viewcode-back" href="../../../../apache_beam.io.gcp.pubsub.html#apache_beam.io.gcp.pubsub.MultipleReadFromPubSub">[docs]</a><span class="k">class</span> <span class="nc">MultipleReadFromPubSub</span><span class="p">(</span><span class="n">PTransform</span><span class="p">):</span> |
| <span class="sd">"""A ``PTransform`` that expands ``ReadFromPubSub`` to read from multiple</span> |
| <span class="sd"> ``PubSubSourceDescriptor``.</span> |
| |
| <span class="sd"> The `MultipleReadFromPubSub` transform allows you to read multiple topics</span> |
| <span class="sd"> and/or subscriptions using just one transform. It is the recommended transform</span> |
| <span class="sd"> to read multiple Pub/Sub sources when the output `PCollection` are going to be</span> |
| <span class="sd"> flattened. The transform takes a list of `PubSubSourceDescriptor` and organize</span> |
| <span class="sd"> them by type (topic / subscription) and project:::</span> |
| |
| <span class="sd"> topic_1 = PubSubSourceDescriptor('projects/myproject/topics/a_topic')</span> |
| <span class="sd"> topic_2 = PubSubSourceDescriptor(</span> |
| <span class="sd"> 'projects/myproject2/topics/b_topic',</span> |
| <span class="sd"> 'my_label',</span> |
| <span class="sd"> 'my_timestamp_attribute')</span> |
| <span class="sd"> subscription_1 = PubSubSourceDescriptor(</span> |
| <span class="sd"> 'projects/myproject/subscriptions/a_subscription')</span> |
| |
| <span class="sd"> results = pipeline | MultipleReadFromPubSub(</span> |
| <span class="sd"> [topic_1, topic_2, subscription_1])</span> |
| <span class="sd"> """</span> |
| <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span> |
| <span class="bp">self</span><span class="p">,</span> |
| <span class="n">pubsub_source_descriptors</span><span class="p">,</span> <span class="c1"># type: List[PubSubSourceDescriptor]</span> |
| <span class="n">with_attributes</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> <span class="c1"># type: bool</span> |
| <span class="p">):</span> |
| <span class="sd">"""Initializes ``PubSubMultipleReader``.</span> |
| |
| <span class="sd"> Args:</span> |
| <span class="sd"> pubsub_source_descriptors: List of Cloud Pub/Sub topics or subscriptions</span> |
| <span class="sd"> of type `~PubSubSourceDescriptor`.</span> |
| <span class="sd"> with_attributes:</span> |
| <span class="sd"> True - input elements will be :class:`~PubsubMessage` objects.</span> |
| <span class="sd"> False - input elements will be of type ``bytes`` (message data only).</span> |
| <span class="sd"> """</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">pubsub_source_descriptors</span> <span class="o">=</span> <span class="n">pubsub_source_descriptors</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">with_attributes</span> <span class="o">=</span> <span class="n">with_attributes</span> |
| |
| <span class="k">for</span> <span class="n">descriptor</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">pubsub_source_descriptors</span><span class="p">:</span> |
| <span class="n">match_descriptor</span> <span class="o">=</span> <span class="n">re</span><span class="o">.</span><span class="n">match</span><span class="p">(</span><span class="n">PUBSUB_DESCRIPTOR_REGEXP</span><span class="p">,</span> <span class="n">descriptor</span><span class="o">.</span><span class="n">source</span><span class="p">)</span> |
| |
| <span class="k">if</span> <span class="ow">not</span> <span class="n">match_descriptor</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span> |
| <span class="s1">'PubSub source descriptor must be in the form "projects/<project>'</span> |
| <span class="s1">'/topics/<topic>" or "projects/<project>/subscription'</span> |
| <span class="s1">'/<subscription>" (got </span><span class="si">%r</span><span class="s1">).'</span> <span class="o">%</span> <span class="n">descriptor</span><span class="o">.</span><span class="n">source</span><span class="p">)</span> |
| |
| <div class="viewcode-block" id="MultipleReadFromPubSub.expand"><a class="viewcode-back" href="../../../../apache_beam.io.gcp.pubsub.html#apache_beam.io.gcp.pubsub.MultipleReadFromPubSub.expand">[docs]</a> <span class="k">def</span> <span class="nf">expand</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">pcol</span><span class="p">):</span> |
| <span class="n">sources_pcol</span> <span class="o">=</span> <span class="p">[]</span> |
| <span class="k">for</span> <span class="n">descriptor</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">pubsub_source_descriptors</span><span class="p">:</span> |
| <span class="n">source_match</span> <span class="o">=</span> <span class="n">re</span><span class="o">.</span><span class="n">match</span><span class="p">(</span><span class="n">PUBSUB_DESCRIPTOR_REGEXP</span><span class="p">,</span> <span class="n">descriptor</span><span class="o">.</span><span class="n">source</span><span class="p">)</span> |
| <span class="n">source_project</span> <span class="o">=</span> <span class="n">source_match</span><span class="o">.</span><span class="n">group</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span> |
| <span class="n">source_type</span> <span class="o">=</span> <span class="n">source_match</span><span class="o">.</span><span class="n">group</span><span class="p">(</span><span class="mi">2</span><span class="p">)</span> |
| <span class="n">source_name</span> <span class="o">=</span> <span class="n">source_match</span><span class="o">.</span><span class="n">group</span><span class="p">(</span><span class="mi">3</span><span class="p">)</span> |
| |
| <span class="n">read_step_name</span> <span class="o">=</span> <span class="s1">'PubSub </span><span class="si">%s</span><span class="s1">/project:</span><span class="si">%s</span><span class="s1">/Read </span><span class="si">%s</span><span class="s1">'</span> <span class="o">%</span> <span class="p">(</span> |
| <span class="n">source_type</span><span class="p">,</span> <span class="n">source_project</span><span class="p">,</span> <span class="n">source_name</span><span class="p">)</span> |
| |
| <span class="k">if</span> <span class="n">source_type</span> <span class="o">==</span> <span class="s1">'topics'</span><span class="p">:</span> |
| <span class="n">current_source</span> <span class="o">=</span> <span class="n">pcol</span> <span class="o">|</span> <span class="n">read_step_name</span> <span class="o">>></span> <span class="n">ReadFromPubSub</span><span class="p">(</span> |
| <span class="n">topic</span><span class="o">=</span><span class="n">descriptor</span><span class="o">.</span><span class="n">source</span><span class="p">,</span> |
| <span class="n">id_label</span><span class="o">=</span><span class="n">descriptor</span><span class="o">.</span><span class="n">id_label</span><span class="p">,</span> |
| <span class="n">with_attributes</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">with_attributes</span><span class="p">,</span> |
| <span class="n">timestamp_attribute</span><span class="o">=</span><span class="n">descriptor</span><span class="o">.</span><span class="n">timestamp_attribute</span><span class="p">)</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="n">current_source</span> <span class="o">=</span> <span class="n">pcol</span> <span class="o">|</span> <span class="n">read_step_name</span> <span class="o">>></span> <span class="n">ReadFromPubSub</span><span class="p">(</span> |
| <span class="n">subscription</span><span class="o">=</span><span class="n">descriptor</span><span class="o">.</span><span class="n">source</span><span class="p">,</span> |
| <span class="n">id_label</span><span class="o">=</span><span class="n">descriptor</span><span class="o">.</span><span class="n">id_label</span><span class="p">,</span> |
| <span class="n">with_attributes</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">with_attributes</span><span class="p">,</span> |
| <span class="n">timestamp_attribute</span><span class="o">=</span><span class="n">descriptor</span><span class="o">.</span><span class="n">timestamp_attribute</span><span class="p">)</span> |
| |
| <span class="n">sources_pcol</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">current_source</span><span class="p">)</span> |
| |
| <span class="k">return</span> <span class="nb">tuple</span><span class="p">(</span><span class="n">sources_pcol</span><span class="p">)</span> <span class="o">|</span> <span class="n">Flatten</span><span class="p">()</span></div></div> |
| </pre></div> |
| |
| </div> |
| |
| </div> |
| <footer> |
| |
| |
| <hr/> |
| |
| <div role="contentinfo"> |
| <p> |
| © Copyright |
| |
| </p> |
| </div> |
| Built with <a href="http://sphinx-doc.org/">Sphinx</a> using a <a href="https://github.com/rtfd/sphinx_rtd_theme">theme</a> provided by <a href="https://readthedocs.org">Read the Docs</a>. |
| |
| </footer> |
| |
| </div> |
| </div> |
| |
| </section> |
| |
| </div> |
| |
| |
| |
| <script type="text/javascript"> |
| jQuery(function () { |
| SphinxRtdTheme.Navigation.enable(true); |
| }); |
| </script> |
| |
| |
| |
| |
| |
| |
| </body> |
| </html> |