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| <h1>Source code for apache_beam.runners.dask.transform_evaluator</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">"""Transform Beam PTransforms into Dask Bag operations.</span> |
| |
| <span class="sd">A minimum set of operation substitutions, to adap Beam's PTransform model</span> |
| <span class="sd">to Dask Bag functions.</span> |
| |
| <span class="sd">TODO(alxr): Translate ops from https://docs.dask.org/en/latest/bag-api.html.</span> |
| <span class="sd">"""</span> |
| <span class="kn">import</span> <span class="nn">abc</span> |
| <span class="kn">import</span> <span class="nn">dataclasses</span> |
| <span class="kn">import</span> <span class="nn">typing</span> <span class="k">as</span> <span class="nn">t</span> |
| |
| <span class="kn">import</span> <span class="nn">apache_beam</span> |
| <span class="kn">import</span> <span class="nn">dask.bag</span> <span class="k">as</span> <span class="nn">db</span> |
| <span class="kn">from</span> <span class="nn">apache_beam.pipeline</span> <span class="kn">import</span> <span class="n">AppliedPTransform</span> |
| <span class="kn">from</span> <span class="nn">apache_beam.runners.dask.overrides</span> <span class="kn">import</span> <span class="n">_Create</span> |
| <span class="kn">from</span> <span class="nn">apache_beam.runners.dask.overrides</span> <span class="kn">import</span> <span class="n">_Flatten</span> |
| <span class="kn">from</span> <span class="nn">apache_beam.runners.dask.overrides</span> <span class="kn">import</span> <span class="n">_GroupByKeyOnly</span> |
| |
| <span class="n">OpInput</span> <span class="o">=</span> <span class="n">t</span><span class="o">.</span><span class="n">Union</span><span class="p">[</span><span class="n">db</span><span class="o">.</span><span class="n">Bag</span><span class="p">,</span> <span class="n">t</span><span class="o">.</span><span class="n">Sequence</span><span class="p">[</span><span class="n">db</span><span class="o">.</span><span class="n">Bag</span><span class="p">],</span> <span class="kc">None</span><span class="p">]</span> |
| |
| |
| <div class="viewcode-block" id="DaskBagOp"><a class="viewcode-back" href="../../../../apache_beam.runners.dask.transform_evaluator.html#apache_beam.runners.dask.transform_evaluator.DaskBagOp">[docs]</a><span class="nd">@dataclasses</span><span class="o">.</span><span class="n">dataclass</span> |
| <span class="k">class</span> <span class="nc">DaskBagOp</span><span class="p">(</span><span class="n">abc</span><span class="o">.</span><span class="n">ABC</span><span class="p">):</span> |
| <span class="n">applied</span><span class="p">:</span> <span class="n">AppliedPTransform</span> |
| |
| <span class="nd">@property</span> |
| <span class="k">def</span> <span class="nf">transform</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">applied</span><span class="o">.</span><span class="n">transform</span> |
| |
| <div class="viewcode-block" id="DaskBagOp.apply"><a class="viewcode-back" href="../../../../apache_beam.runners.dask.transform_evaluator.html#apache_beam.runners.dask.transform_evaluator.DaskBagOp.apply">[docs]</a> <span class="nd">@abc</span><span class="o">.</span><span class="n">abstractmethod</span> |
| <span class="k">def</span> <span class="nf">apply</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">input_bag</span><span class="p">:</span> <span class="n">OpInput</span><span class="p">)</span> <span class="o">-></span> <span class="n">db</span><span class="o">.</span><span class="n">Bag</span><span class="p">:</span> |
| <span class="k">pass</span></div></div> |
| |
| |
| <div class="viewcode-block" id="NoOp"><a class="viewcode-back" href="../../../../apache_beam.runners.dask.transform_evaluator.html#apache_beam.runners.dask.transform_evaluator.NoOp">[docs]</a><span class="k">class</span> <span class="nc">NoOp</span><span class="p">(</span><span class="n">DaskBagOp</span><span class="p">):</span> |
| <div class="viewcode-block" id="NoOp.apply"><a class="viewcode-back" href="../../../../apache_beam.runners.dask.transform_evaluator.html#apache_beam.runners.dask.transform_evaluator.NoOp.apply">[docs]</a> <span class="k">def</span> <span class="nf">apply</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">input_bag</span><span class="p">:</span> <span class="n">OpInput</span><span class="p">)</span> <span class="o">-></span> <span class="n">db</span><span class="o">.</span><span class="n">Bag</span><span class="p">:</span> |
| <span class="k">return</span> <span class="n">input_bag</span></div></div> |
| |
| |
| <div class="viewcode-block" id="Create"><a class="viewcode-back" href="../../../../apache_beam.runners.dask.transform_evaluator.html#apache_beam.runners.dask.transform_evaluator.Create">[docs]</a><span class="k">class</span> <span class="nc">Create</span><span class="p">(</span><span class="n">DaskBagOp</span><span class="p">):</span> |
| <div class="viewcode-block" id="Create.apply"><a class="viewcode-back" href="../../../../apache_beam.runners.dask.transform_evaluator.html#apache_beam.runners.dask.transform_evaluator.Create.apply">[docs]</a> <span class="k">def</span> <span class="nf">apply</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">input_bag</span><span class="p">:</span> <span class="n">OpInput</span><span class="p">)</span> <span class="o">-></span> <span class="n">db</span><span class="o">.</span><span class="n">Bag</span><span class="p">:</span> |
| <span class="k">assert</span> <span class="n">input_bag</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">,</span> <span class="s1">'Create expects no input!'</span> |
| <span class="n">original_transform</span> <span class="o">=</span> <span class="n">t</span><span class="o">.</span><span class="n">cast</span><span class="p">(</span><span class="n">_Create</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">transform</span><span class="p">)</span> |
| <span class="n">items</span> <span class="o">=</span> <span class="n">original_transform</span><span class="o">.</span><span class="n">values</span> |
| <span class="k">return</span> <span class="n">db</span><span class="o">.</span><span class="n">from_sequence</span><span class="p">(</span><span class="n">items</span><span class="p">)</span></div></div> |
| |
| |
| <div class="viewcode-block" id="ParDo"><a class="viewcode-back" href="../../../../apache_beam.runners.dask.transform_evaluator.html#apache_beam.runners.dask.transform_evaluator.ParDo">[docs]</a><span class="k">class</span> <span class="nc">ParDo</span><span class="p">(</span><span class="n">DaskBagOp</span><span class="p">):</span> |
| <div class="viewcode-block" id="ParDo.apply"><a class="viewcode-back" href="../../../../apache_beam.runners.dask.transform_evaluator.html#apache_beam.runners.dask.transform_evaluator.ParDo.apply">[docs]</a> <span class="k">def</span> <span class="nf">apply</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">input_bag</span><span class="p">:</span> <span class="n">db</span><span class="o">.</span><span class="n">Bag</span><span class="p">)</span> <span class="o">-></span> <span class="n">db</span><span class="o">.</span><span class="n">Bag</span><span class="p">:</span> |
| <span class="n">transform</span> <span class="o">=</span> <span class="n">t</span><span class="o">.</span><span class="n">cast</span><span class="p">(</span><span class="n">apache_beam</span><span class="o">.</span><span class="n">ParDo</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">transform</span><span class="p">)</span> |
| <span class="k">return</span> <span class="n">input_bag</span><span class="o">.</span><span class="n">map</span><span class="p">(</span> |
| <span class="n">transform</span><span class="o">.</span><span class="n">fn</span><span class="o">.</span><span class="n">process</span><span class="p">,</span> <span class="o">*</span><span class="n">transform</span><span class="o">.</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">transform</span><span class="o">.</span><span class="n">kwargs</span><span class="p">)</span><span class="o">.</span><span class="n">flatten</span><span class="p">()</span></div></div> |
| |
| |
| <div class="viewcode-block" id="Map"><a class="viewcode-back" href="../../../../apache_beam.runners.dask.transform_evaluator.html#apache_beam.runners.dask.transform_evaluator.Map">[docs]</a><span class="k">class</span> <span class="nc">Map</span><span class="p">(</span><span class="n">DaskBagOp</span><span class="p">):</span> |
| <div class="viewcode-block" id="Map.apply"><a class="viewcode-back" href="../../../../apache_beam.runners.dask.transform_evaluator.html#apache_beam.runners.dask.transform_evaluator.Map.apply">[docs]</a> <span class="k">def</span> <span class="nf">apply</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">input_bag</span><span class="p">:</span> <span class="n">db</span><span class="o">.</span><span class="n">Bag</span><span class="p">)</span> <span class="o">-></span> <span class="n">db</span><span class="o">.</span><span class="n">Bag</span><span class="p">:</span> |
| <span class="n">transform</span> <span class="o">=</span> <span class="n">t</span><span class="o">.</span><span class="n">cast</span><span class="p">(</span><span class="n">apache_beam</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">transform</span><span class="p">)</span> |
| <span class="k">return</span> <span class="n">input_bag</span><span class="o">.</span><span class="n">map</span><span class="p">(</span> |
| <span class="n">transform</span><span class="o">.</span><span class="n">fn</span><span class="o">.</span><span class="n">process</span><span class="p">,</span> <span class="o">*</span><span class="n">transform</span><span class="o">.</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">transform</span><span class="o">.</span><span class="n">kwargs</span><span class="p">)</span></div></div> |
| |
| |
| <div class="viewcode-block" id="GroupByKey"><a class="viewcode-back" href="../../../../apache_beam.runners.dask.transform_evaluator.html#apache_beam.runners.dask.transform_evaluator.GroupByKey">[docs]</a><span class="k">class</span> <span class="nc">GroupByKey</span><span class="p">(</span><span class="n">DaskBagOp</span><span class="p">):</span> |
| <div class="viewcode-block" id="GroupByKey.apply"><a class="viewcode-back" href="../../../../apache_beam.runners.dask.transform_evaluator.html#apache_beam.runners.dask.transform_evaluator.GroupByKey.apply">[docs]</a> <span class="k">def</span> <span class="nf">apply</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">input_bag</span><span class="p">:</span> <span class="n">db</span><span class="o">.</span><span class="n">Bag</span><span class="p">)</span> <span class="o">-></span> <span class="n">db</span><span class="o">.</span><span class="n">Bag</span><span class="p">:</span> |
| <span class="k">def</span> <span class="nf">key</span><span class="p">(</span><span class="n">item</span><span class="p">):</span> |
| <span class="k">return</span> <span class="n">item</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> |
| |
| <span class="k">def</span> <span class="nf">value</span><span class="p">(</span><span class="n">item</span><span class="p">):</span> |
| <span class="n">k</span><span class="p">,</span> <span class="n">v</span> <span class="o">=</span> <span class="n">item</span> |
| <span class="k">return</span> <span class="n">k</span><span class="p">,</span> <span class="p">[</span><span class="n">elm</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span> <span class="k">for</span> <span class="n">elm</span> <span class="ow">in</span> <span class="n">v</span><span class="p">]</span> |
| |
| <span class="k">return</span> <span class="n">input_bag</span><span class="o">.</span><span class="n">groupby</span><span class="p">(</span><span class="n">key</span><span class="p">)</span><span class="o">.</span><span class="n">map</span><span class="p">(</span><span class="n">value</span><span class="p">)</span></div></div> |
| |
| |
| <div class="viewcode-block" id="Flatten"><a class="viewcode-back" href="../../../../apache_beam.runners.dask.transform_evaluator.html#apache_beam.runners.dask.transform_evaluator.Flatten">[docs]</a><span class="k">class</span> <span class="nc">Flatten</span><span class="p">(</span><span class="n">DaskBagOp</span><span class="p">):</span> |
| <div class="viewcode-block" id="Flatten.apply"><a class="viewcode-back" href="../../../../apache_beam.runners.dask.transform_evaluator.html#apache_beam.runners.dask.transform_evaluator.Flatten.apply">[docs]</a> <span class="k">def</span> <span class="nf">apply</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">input_bag</span><span class="p">:</span> <span class="n">OpInput</span><span class="p">)</span> <span class="o">-></span> <span class="n">db</span><span class="o">.</span><span class="n">Bag</span><span class="p">:</span> |
| <span class="k">assert</span> <span class="nb">type</span><span class="p">(</span><span class="n">input_bag</span><span class="p">)</span> <span class="ow">is</span> <span class="nb">list</span><span class="p">,</span> <span class="s1">'Must take a sequence of bags!'</span> |
| <span class="k">return</span> <span class="n">db</span><span class="o">.</span><span class="n">concat</span><span class="p">(</span><span class="n">input_bag</span><span class="p">)</span></div></div> |
| |
| |
| <span class="n">TRANSLATIONS</span> <span class="o">=</span> <span class="p">{</span> |
| <span class="n">_Create</span><span class="p">:</span> <span class="n">Create</span><span class="p">,</span> |
| <span class="n">apache_beam</span><span class="o">.</span><span class="n">ParDo</span><span class="p">:</span> <span class="n">ParDo</span><span class="p">,</span> |
| <span class="n">apache_beam</span><span class="o">.</span><span class="n">Map</span><span class="p">:</span> <span class="n">Map</span><span class="p">,</span> |
| <span class="n">_GroupByKeyOnly</span><span class="p">:</span> <span class="n">GroupByKey</span><span class="p">,</span> |
| <span class="n">_Flatten</span><span class="p">:</span> <span class="n">Flatten</span><span class="p">,</span> |
| <span class="p">}</span> |
| </pre></div> |
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