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| <h1>Source code for apache_beam.testing.test_utils</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">"""Utility methods for testing</span> |
| |
| <span class="sd">For internal use only; no backwards-compatibility guarantees.</span> |
| <span class="sd">"""</span> |
| |
| <span class="c1"># pytype: skip-file</span> |
| |
| <span class="kn">import</span> <span class="nn">hashlib</span> |
| <span class="kn">import</span> <span class="nn">importlib</span> |
| <span class="kn">import</span> <span class="nn">os</span> |
| <span class="kn">import</span> <span class="nn">shutil</span> |
| <span class="kn">import</span> <span class="nn">tempfile</span> |
| |
| <span class="kn">from</span> <span class="nn">apache_beam.io.filesystems</span> <span class="kn">import</span> <span class="n">FileSystems</span> |
| <span class="kn">from</span> <span class="nn">apache_beam.utils</span> <span class="kn">import</span> <span class="n">retry</span> |
| |
| <span class="n">DEFAULT_HASHING_ALG</span> <span class="o">=</span> <span class="s1">'sha1'</span> |
| |
| |
| <div class="viewcode-block" id="TempDir"><a class="viewcode-back" href="../../../apache_beam.testing.test_utils.html#apache_beam.testing.test_utils.TempDir">[docs]</a><span class="k">class</span> <span class="nc">TempDir</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span> |
| <span class="w"> </span><span class="sd">"""Context Manager to create and clean-up a temporary directory."""</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="bp">self</span><span class="o">.</span><span class="n">_tempdir</span> <span class="o">=</span> <span class="n">tempfile</span><span class="o">.</span><span class="n">mkdtemp</span><span class="p">()</span> |
| |
| <span class="k">def</span> <span class="fm">__enter__</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="k">def</span> <span class="fm">__exit__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">):</span> |
| <span class="k">if</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">exists</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_tempdir</span><span class="p">):</span> |
| <span class="n">shutil</span><span class="o">.</span><span class="n">rmtree</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_tempdir</span><span class="p">)</span> |
| |
| <div class="viewcode-block" id="TempDir.get_path"><a class="viewcode-back" href="../../../apache_beam.testing.test_utils.html#apache_beam.testing.test_utils.TempDir.get_path">[docs]</a> <span class="k">def</span> <span class="nf">get_path</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="w"> </span><span class="sd">"""Returns the path to the temporary directory."""</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_tempdir</span></div> |
| |
| <div class="viewcode-block" id="TempDir.create_temp_file"><a class="viewcode-back" href="../../../apache_beam.testing.test_utils.html#apache_beam.testing.test_utils.TempDir.create_temp_file">[docs]</a> <span class="k">def</span> <span class="nf">create_temp_file</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">suffix</span><span class="o">=</span><span class="s1">''</span><span class="p">,</span> <span class="n">lines</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span> |
| <span class="w"> </span><span class="sd">"""Creates a temporary file in the temporary directory.</span> |
| |
| <span class="sd"> Args:</span> |
| <span class="sd"> suffix (str): The filename suffix of the temporary file (e.g. '.txt')</span> |
| <span class="sd"> lines (List[str]): A list of lines that will be written to the temporary</span> |
| <span class="sd"> file.</span> |
| <span class="sd"> Returns:</span> |
| <span class="sd"> The name of the temporary file created.</span> |
| <span class="sd"> """</span> |
| <span class="k">with</span> <span class="n">tempfile</span><span class="o">.</span><span class="n">NamedTemporaryFile</span><span class="p">(</span><span class="n">delete</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> |
| <span class="nb">dir</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_tempdir</span><span class="p">,</span> |
| <span class="n">suffix</span><span class="o">=</span><span class="n">suffix</span><span class="p">)</span> <span class="k">as</span> <span class="n">f</span><span class="p">:</span> |
| <span class="k">if</span> <span class="n">lines</span><span class="p">:</span> |
| <span class="k">for</span> <span class="n">line</span> <span class="ow">in</span> <span class="n">lines</span><span class="p">:</span> |
| <span class="n">f</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="n">line</span><span class="p">)</span> |
| |
| <span class="k">return</span> <span class="n">f</span><span class="o">.</span><span class="n">name</span></div></div> |
| |
| |
| <div class="viewcode-block" id="compute_hash"><a class="viewcode-back" href="../../../apache_beam.testing.test_utils.html#apache_beam.testing.test_utils.compute_hash">[docs]</a><span class="k">def</span> <span class="nf">compute_hash</span><span class="p">(</span><span class="n">content</span><span class="p">,</span> <span class="n">hashing_alg</span><span class="o">=</span><span class="n">DEFAULT_HASHING_ALG</span><span class="p">):</span> |
| <span class="w"> </span><span class="sd">"""Compute a hash value of a list of objects by hashing their string</span> |
| <span class="sd"> representations."""</span> |
| <span class="n">content</span> <span class="o">=</span> <span class="p">[</span> |
| <span class="nb">str</span><span class="p">(</span><span class="n">x</span><span class="p">)</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="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">x</span><span class="p">,</span> <span class="nb">bytes</span><span class="p">)</span> <span class="k">else</span> <span class="n">x</span> <span class="k">for</span> <span class="n">x</span> <span class="ow">in</span> <span class="n">content</span> |
| <span class="p">]</span> |
| <span class="n">content</span><span class="o">.</span><span class="n">sort</span><span class="p">()</span> |
| <span class="n">m</span> <span class="o">=</span> <span class="n">hashlib</span><span class="o">.</span><span class="n">new</span><span class="p">(</span><span class="n">hashing_alg</span><span class="p">)</span> |
| <span class="k">for</span> <span class="n">elem</span> <span class="ow">in</span> <span class="n">content</span><span class="p">:</span> |
| <span class="n">m</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">elem</span><span class="p">)</span> |
| <span class="k">return</span> <span class="n">m</span><span class="o">.</span><span class="n">hexdigest</span><span class="p">()</span></div> |
| |
| |
| <div class="viewcode-block" id="patch_retry"><a class="viewcode-back" href="../../../apache_beam.testing.test_utils.html#apache_beam.testing.test_utils.patch_retry">[docs]</a><span class="k">def</span> <span class="nf">patch_retry</span><span class="p">(</span><span class="n">testcase</span><span class="p">,</span> <span class="n">module</span><span class="p">):</span> |
| <span class="w"> </span><span class="sd">"""A function to patch retry module to use mock clock and logger.</span> |
| |
| <span class="sd"> Clock and logger that defined in retry decorator will be replaced in test</span> |
| <span class="sd"> in order to skip sleep phase when retry happens.</span> |
| |
| <span class="sd"> Args:</span> |
| <span class="sd"> testcase: An instance of unittest.TestCase that calls this function to</span> |
| <span class="sd"> patch retry module.</span> |
| <span class="sd"> module: The module that uses retry and need to be replaced with mock</span> |
| <span class="sd"> clock and logger in test.</span> |
| <span class="sd"> """</span> |
| <span class="c1"># Import mock here to avoid execution time errors for other utilities</span> |
| <span class="kn">from</span> <span class="nn">mock</span> <span class="kn">import</span> <span class="n">Mock</span> |
| <span class="kn">from</span> <span class="nn">mock</span> <span class="kn">import</span> <span class="n">patch</span> |
| |
| <span class="n">real_retry_with_exponential_backoff</span> <span class="o">=</span> <span class="n">retry</span><span class="o">.</span><span class="n">with_exponential_backoff</span> |
| |
| <span class="k">def</span> <span class="nf">patched_retry_with_exponential_backoff</span><span class="p">(</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span> |
| <span class="w"> </span><span class="sd">"""A patch for retry decorator to use a mock dummy clock and logger."""</span> |
| <span class="n">kwargs</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">logger</span><span class="o">=</span><span class="n">Mock</span><span class="p">(),</span> <span class="n">clock</span><span class="o">=</span><span class="n">Mock</span><span class="p">())</span> |
| <span class="k">return</span> <span class="n">real_retry_with_exponential_backoff</span><span class="p">(</span><span class="o">**</span><span class="n">kwargs</span><span class="p">)</span> |
| |
| <span class="n">patch</span><span class="o">.</span><span class="n">object</span><span class="p">(</span> |
| <span class="n">retry</span><span class="p">,</span> |
| <span class="s1">'with_exponential_backoff'</span><span class="p">,</span> |
| <span class="n">side_effect</span><span class="o">=</span><span class="n">patched_retry_with_exponential_backoff</span><span class="p">)</span><span class="o">.</span><span class="n">start</span><span class="p">()</span> |
| |
| <span class="c1"># Reload module after patching.</span> |
| <span class="n">importlib</span><span class="o">.</span><span class="n">reload</span><span class="p">(</span><span class="n">module</span><span class="p">)</span> |
| |
| <span class="k">def</span> <span class="nf">remove_patches</span><span class="p">():</span> |
| <span class="n">patch</span><span class="o">.</span><span class="n">stopall</span><span class="p">()</span> |
| <span class="c1"># Reload module again after removing patch.</span> |
| <span class="n">importlib</span><span class="o">.</span><span class="n">reload</span><span class="p">(</span><span class="n">module</span><span class="p">)</span> |
| |
| <span class="n">testcase</span><span class="o">.</span><span class="n">addCleanup</span><span class="p">(</span><span class="n">remove_patches</span><span class="p">)</span></div> |
| |
| |
| <div class="viewcode-block" id="delete_files"><a class="viewcode-back" href="../../../apache_beam.testing.test_utils.html#apache_beam.testing.test_utils.delete_files">[docs]</a><span class="nd">@retry</span><span class="o">.</span><span class="n">with_exponential_backoff</span><span class="p">(</span> |
| <span class="n">num_retries</span><span class="o">=</span><span class="mi">3</span><span class="p">,</span> <span class="n">retry_filter</span><span class="o">=</span><span class="n">retry</span><span class="o">.</span><span class="n">retry_on_beam_io_error_filter</span><span class="p">)</span> |
| <span class="k">def</span> <span class="nf">delete_files</span><span class="p">(</span><span class="n">file_paths</span><span class="p">):</span> |
| <span class="w"> </span><span class="sd">"""A function to clean up files or directories using ``FileSystems``.</span> |
| |
| <span class="sd"> Glob is supported in file path and directories will be deleted recursively.</span> |
| |
| <span class="sd"> Args:</span> |
| <span class="sd"> file_paths: A list of strings contains file paths or directories.</span> |
| <span class="sd"> """</span> |
| <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">file_paths</span><span class="p">)</span> <span class="o">==</span> <span class="mi">0</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">RuntimeError</span><span class="p">(</span><span class="s1">'Clean up failed. Invalid file path: </span><span class="si">%s</span><span class="s1">.'</span> <span class="o">%</span> <span class="n">file_paths</span><span class="p">)</span> |
| <span class="n">FileSystems</span><span class="o">.</span><span class="n">delete</span><span class="p">(</span><span class="n">file_paths</span><span class="p">)</span></div> |
| |
| |
| <div class="viewcode-block" id="cleanup_subscriptions"><a class="viewcode-back" href="../../../apache_beam.testing.test_utils.html#apache_beam.testing.test_utils.cleanup_subscriptions">[docs]</a><span class="k">def</span> <span class="nf">cleanup_subscriptions</span><span class="p">(</span><span class="n">sub_client</span><span class="p">,</span> <span class="n">subs</span><span class="p">):</span> |
| <span class="w"> </span><span class="sd">"""Cleanup PubSub subscriptions if exist."""</span> |
| <span class="k">for</span> <span class="n">sub</span> <span class="ow">in</span> <span class="n">subs</span><span class="p">:</span> |
| <span class="n">sub_client</span><span class="o">.</span><span class="n">delete_subscription</span><span class="p">(</span><span class="n">subscription</span><span class="o">=</span><span class="n">sub</span><span class="o">.</span><span class="n">name</span><span class="p">)</span></div> |
| |
| |
| <div class="viewcode-block" id="cleanup_topics"><a class="viewcode-back" href="../../../apache_beam.testing.test_utils.html#apache_beam.testing.test_utils.cleanup_topics">[docs]</a><span class="k">def</span> <span class="nf">cleanup_topics</span><span class="p">(</span><span class="n">pub_client</span><span class="p">,</span> <span class="n">topics</span><span class="p">):</span> |
| <span class="w"> </span><span class="sd">"""Cleanup PubSub topics if exist."""</span> |
| <span class="k">for</span> <span class="n">topic</span> <span class="ow">in</span> <span class="n">topics</span><span class="p">:</span> |
| <span class="n">pub_client</span><span class="o">.</span><span class="n">delete_topic</span><span class="p">(</span><span class="n">topic</span><span class="o">=</span><span class="n">topic</span><span class="o">.</span><span class="n">name</span><span class="p">)</span></div> |
| |
| |
| <div class="viewcode-block" id="PullResponseMessage"><a class="viewcode-back" href="../../../apache_beam.testing.test_utils.html#apache_beam.testing.test_utils.PullResponseMessage">[docs]</a><span class="k">class</span> <span class="nc">PullResponseMessage</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span> |
| <span class="w"> </span><span class="sd">"""Data representing a pull request response.</span> |
| |
| <span class="sd"> Utility class for ``create_pull_response``.</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="o">=</span><span class="kc">None</span><span class="p">,</span> |
| <span class="n">publish_time_secs</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> |
| <span class="n">publish_time_nanos</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> |
| <span class="n">ack_id</span><span class="o">=</span><span class="kc">None</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">publish_time_secs</span> <span class="o">=</span> <span class="n">publish_time_secs</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">publish_time_nanos</span> <span class="o">=</span> <span class="n">publish_time_nanos</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">ack_id</span> <span class="o">=</span> <span class="n">ack_id</span></div> |
| |
| |
| <div class="viewcode-block" id="create_pull_response"><a class="viewcode-back" href="../../../apache_beam.testing.test_utils.html#apache_beam.testing.test_utils.create_pull_response">[docs]</a><span class="k">def</span> <span class="nf">create_pull_response</span><span class="p">(</span><span class="n">responses</span><span class="p">):</span> |
| <span class="w"> </span><span class="sd">"""Create an instance of ``google.cloud.pubsub.types.ReceivedMessage``.</span> |
| |
| <span class="sd"> Used to simulate the response from pubsub.SubscriberClient().pull().</span> |
| |
| <span class="sd"> Args:</span> |
| <span class="sd"> responses: list of ``PullResponseMessage``</span> |
| |
| <span class="sd"> Returns:</span> |
| <span class="sd"> An instance of ``google.cloud.pubsub.types.PullResponse`` populated with</span> |
| <span class="sd"> responses.</span> |
| <span class="sd"> """</span> |
| <span class="kn">from</span> <span class="nn">google.cloud</span> <span class="kn">import</span> <span class="n">pubsub</span> |
| <span class="kn">from</span> <span class="nn">google.protobuf</span> <span class="kn">import</span> <span class="n">timestamp_pb2</span> |
| |
| <span class="n">res</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">PullResponse</span><span class="p">()</span> |
| <span class="k">for</span> <span class="n">response</span> <span class="ow">in</span> <span class="n">responses</span><span class="p">:</span> |
| <span class="n">received_message</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">ReceivedMessage</span><span class="p">()</span> |
| |
| <span class="n">message</span> <span class="o">=</span> <span class="n">received_message</span><span class="o">.</span><span class="n">message</span> |
| <span class="n">message</span><span class="o">.</span><span class="n">data</span> <span class="o">=</span> <span class="n">response</span><span class="o">.</span><span class="n">data</span> |
| <span class="k">if</span> <span class="n">response</span><span class="o">.</span><span class="n">attributes</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="k">for</span> <span class="n">k</span><span class="p">,</span> <span class="n">v</span> <span class="ow">in</span> <span class="n">response</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">message</span><span class="o">.</span><span class="n">attributes</span><span class="p">[</span><span class="n">k</span><span class="p">]</span> <span class="o">=</span> <span class="n">v</span> |
| |
| <span class="n">publish_time</span> <span class="o">=</span> <span class="n">timestamp_pb2</span><span class="o">.</span><span class="n">Timestamp</span><span class="p">()</span> |
| <span class="k">if</span> <span class="n">response</span><span class="o">.</span><span class="n">publish_time_secs</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="n">publish_time</span><span class="o">.</span><span class="n">seconds</span> <span class="o">=</span> <span class="n">response</span><span class="o">.</span><span class="n">publish_time_secs</span> |
| <span class="k">if</span> <span class="n">response</span><span class="o">.</span><span class="n">publish_time_nanos</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="n">publish_time</span><span class="o">.</span><span class="n">nanos</span> <span class="o">=</span> <span class="n">response</span><span class="o">.</span><span class="n">publish_time_nanos</span> |
| <span class="n">message</span><span class="o">.</span><span class="n">publish_time</span> <span class="o">=</span> <span class="n">publish_time</span> |
| |
| <span class="k">if</span> <span class="n">response</span><span class="o">.</span><span class="n">ack_id</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="n">received_message</span><span class="o">.</span><span class="n">ack_id</span> <span class="o">=</span> <span class="n">response</span><span class="o">.</span><span class="n">ack_id</span> |
| |
| <span class="n">res</span><span class="o">.</span><span class="n">received_messages</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">received_message</span><span class="p">)</span> |
| |
| <span class="k">return</span> <span class="n">res</span></div> |
| |
| |
| <div class="viewcode-block" id="create_file"><a class="viewcode-back" href="../../../apache_beam.testing.test_utils.html#apache_beam.testing.test_utils.create_file">[docs]</a><span class="k">def</span> <span class="nf">create_file</span><span class="p">(</span><span class="n">path</span><span class="p">,</span> <span class="n">contents</span><span class="p">):</span> |
| <span class="w"> </span><span class="sd">"""Create a file to use as input to test pipelines"""</span> |
| <span class="k">with</span> <span class="n">FileSystems</span><span class="o">.</span><span class="n">create</span><span class="p">(</span><span class="n">path</span><span class="p">)</span> <span class="k">as</span> <span class="n">f</span><span class="p">:</span> |
| <span class="n">f</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="nb">str</span><span class="o">.</span><span class="n">encode</span><span class="p">(</span><span class="n">contents</span><span class="p">,</span> <span class="s1">'utf-8'</span><span class="p">))</span> |
| <span class="k">return</span> <span class="n">path</span></div> |
| |
| |
| <div class="viewcode-block" id="read_files_from_pattern"><a class="viewcode-back" href="../../../apache_beam.testing.test_utils.html#apache_beam.testing.test_utils.read_files_from_pattern">[docs]</a><span class="k">def</span> <span class="nf">read_files_from_pattern</span><span class="p">(</span><span class="n">file_pattern</span><span class="p">):</span> |
| <span class="w"> </span><span class="sd">"""Reads the files that match a pattern"""</span> |
| <span class="n">metadata_list</span> <span class="o">=</span> <span class="n">FileSystems</span><span class="o">.</span><span class="n">match</span><span class="p">([</span><span class="n">file_pattern</span><span class="p">])[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">metadata_list</span> |
| <span class="n">output</span> <span class="o">=</span> <span class="p">[]</span> |
| <span class="k">for</span> <span class="n">metadata</span> <span class="ow">in</span> <span class="n">metadata_list</span><span class="p">:</span> |
| <span class="k">with</span> <span class="n">FileSystems</span><span class="o">.</span><span class="n">open</span><span class="p">(</span><span class="n">metadata</span><span class="o">.</span><span class="n">path</span><span class="p">)</span> <span class="k">as</span> <span class="n">f</span><span class="p">:</span> |
| <span class="n">output</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">f</span><span class="o">.</span><span class="n">read</span><span class="p">()</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="o">.</span><span class="n">strip</span><span class="p">())</span> |
| <span class="k">return</span> <span class="s1">'</span><span class="se">\n</span><span class="s1">'</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">output</span><span class="p">)</span></div> |
| </pre></div> |
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