http://git-wip-us.apache.org/repos/asf/incubator-airflow-site/blob/28a3eb60/_modules/airflow/executors/local_executor.html ---------------------------------------------------------------------- diff --git a/_modules/airflow/executors/local_executor.html b/_modules/airflow/executors/local_executor.html index 2e35470..cfbf241 100644 --- a/_modules/airflow/executors/local_executor.html +++ b/_modules/airflow/executors/local_executor.html @@ -13,6 +13,8 @@ + + @@ -80,7 +82,10 @@ - <ul> + + + + <ul> <li class="toctree-l1"><a class="reference internal" href="../../../project.html">Project</a></li> <li class="toctree-l1"><a class="reference internal" href="../../../license.html">License</a></li> <li class="toctree-l1"><a class="reference internal" href="../../../start.html">Quick Start</a></li> @@ -184,16 +189,15 @@ <span class="kn">from</span> <span class="nn">airflow</span> <span class="k">import</span> <span class="n">configuration</span> <span class="kn">from</span> <span class="nn">airflow.executors.base_executor</span> <span class="k">import</span> <span class="n">BaseExecutor</span> +<span class="kn">from</span> <span class="nn">airflow.utils.log.logging_mixin</span> <span class="k">import</span> <span class="n">LoggingMixin</span> <span class="kn">from</span> <span class="nn">airflow.utils.state</span> <span class="k">import</span> <span class="n">State</span> -<span class="kn">from</span> <span class="nn">airflow.utils.logging</span> <span class="k">import</span> <span class="n">LoggingMixin</span> <span class="n">PARALLELISM</span> <span class="o">=</span> <span class="n">configuration</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">'core'</span><span class="p">,</span> <span class="s1">'PARALLELISM'</span><span class="p">)</span> <span class="k">class</span> <span class="nc">LocalWorker</span><span class="p">(</span><span class="n">multiprocessing</span><span class="o">.</span><span class="n">Process</span><span class="p">,</span> <span class="n">LoggingMixin</span><span class="p">):</span> - <span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">task_queue</span><span class="p">,</span> <span class="n">result_queue</span><span class="p">):</span> - <span class="n">multiprocessing</span><span class="o">.</span><span class="n">Process</span><span class="o">.</span><span class="n">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> + <span class="n">multiprocessing</span><span class="o">.</span><span class="n">Process</span><span class="o">.</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">task_queue</span> <span class="o">=</span> <span class="n">task_queue</span> <span class="bp">self</span><span class="o">.</span><span class="n">result_queue</span> <span class="o">=</span> <span class="n">result_queue</span> <span class="bp">self</span><span class="o">.</span><span class="n">daemon</span> <span class="o">=</span> <span class="kc">True</span> @@ -205,15 +209,15 @@ <span class="c1"># Received poison pill, no more tasks to run</span> <span class="bp">self</span><span class="o">.</span><span class="n">task_queue</span><span class="o">.</span><span class="n">task_done</span><span class="p">()</span> <span class="k">break</span> - <span class="bp">self</span><span class="o">.</span><span class="n">logger</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s2">"</span><span class="si">{}</span><span class="s2"> running </span><span class="si">{}</span><span class="s2">"</span><span class="o">.</span><span class="n">format</span><span class="p">(</span> - <span class="bp">self</span><span class="o">.</span><span class="n">__class__</span><span class="o">.</span><span class="n">__name__</span><span class="p">,</span> <span class="n">command</span><span class="p">))</span> + <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s2">"</span><span class="si">%s</span><span class="s2"> running </span><span class="si">%s</span><span class="s2">"</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="vm">__class__</span><span class="o">.</span><span class="vm">__name__</span><span class="p">,</span> <span class="n">command</span><span class="p">)</span> <span class="n">command</span> <span class="o">=</span> <span class="s2">"exec bash -c '</span><span class="si">{0}</span><span class="s2">'"</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">command</span><span class="p">)</span> <span class="k">try</span><span class="p">:</span> <span class="n">subprocess</span><span class="o">.</span><span class="n">check_call</span><span class="p">(</span><span class="n">command</span><span class="p">,</span> <span class="n">shell</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span> <span class="n">state</span> <span class="o">=</span> <span class="n">State</span><span class="o">.</span><span class="n">SUCCESS</span> <span class="k">except</span> <span class="n">subprocess</span><span class="o">.</span><span class="n">CalledProcessError</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span> <span class="n">state</span> <span class="o">=</span> <span class="n">State</span><span class="o">.</span><span class="n">FAILED</span> - <span class="bp">self</span><span class="o">.</span><span class="n">logger</span><span class="o">.</span><span class="n">error</span><span class="p">(</span><span class="s2">"failed to execute task </span><span class="si">{}</span><span class="s2">:"</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="nb">str</span><span class="p">(</span><span class="n">e</span><span class="p">)))</span> + <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">error</span><span class="p">(</span><span class="s2">"Failed to execute task </span><span class="si">%s</span><span class="s2">."</span><span class="p">,</span> <span class="nb">str</span><span class="p">(</span><span class="n">e</span><span class="p">))</span> + <span class="c1"># TODO: Why is this commented out?</span> <span class="c1"># raise e</span> <span class="bp">self</span><span class="o">.</span><span class="n">result_queue</span><span class="o">.</span><span class="n">put</span><span class="p">((</span><span class="n">key</span><span class="p">,</span> <span class="n">state</span><span class="p">))</span> <span class="bp">self</span><span class="o">.</span><span class="n">task_queue</span><span class="o">.</span><span class="n">task_done</span><span class="p">()</span> @@ -232,7 +236,7 @@ <span class="bp">self</span><span class="o">.</span><span class="n">result_queue</span> <span class="o">=</span> <span class="n">multiprocessing</span><span class="o">.</span><span class="n">Queue</span><span class="p">()</span> <span class="bp">self</span><span class="o">.</span><span class="n">workers</span> <span class="o">=</span> <span class="p">[</span> <span class="n">LocalWorker</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">queue</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">result_queue</span><span class="p">)</span> - <span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">parallelism</span><span class="p">)</span> + <span class="k">for</span> <span class="n">_</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">parallelism</span><span class="p">)</span> <span class="p">]</span> <span class="k">for</span> <span class="n">w</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">workers</span><span class="p">:</span>
http://git-wip-us.apache.org/repos/asf/incubator-airflow-site/blob/28a3eb60/_modules/airflow/executors/sequential_executor.html ---------------------------------------------------------------------- diff --git a/_modules/airflow/executors/sequential_executor.html b/_modules/airflow/executors/sequential_executor.html index d5644c2..2c7dbac 100644 --- a/_modules/airflow/executors/sequential_executor.html +++ b/_modules/airflow/executors/sequential_executor.html @@ -13,6 +13,8 @@ + + @@ -80,7 +82,10 @@ - <ul> + + + + <ul> <li class="toctree-l1"><a class="reference internal" href="../../../project.html">Project</a></li> <li class="toctree-l1"><a class="reference internal" href="../../../license.html">License</a></li> <li class="toctree-l1"><a class="reference internal" href="../../../start.html">Quick Start</a></li> @@ -193,7 +198,7 @@ <span class="sd"> SequentialExecutor alongside sqlite as you first install it.</span> <span class="sd"> """</span> <span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> - <span class="nb">super</span><span class="p">(</span><span class="n">SequentialExecutor</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">__init__</span><span class="p">()</span> + <span class="nb">super</span><span class="p">(</span><span class="n">SequentialExecutor</span><span class="p">,</span> <span class="bp">self</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">commands_to_run</span> <span class="o">=</span> <span class="p">[]</span> <span class="k">def</span> <span class="nf">execute_async</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">key</span><span class="p">,</span> <span class="n">command</span><span class="p">,</span> <span class="n">queue</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span> @@ -201,14 +206,14 @@ <span class="k">def</span> <span class="nf">sync</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> <span class="k">for</span> <span class="n">key</span><span class="p">,</span> <span class="n">command</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">commands_to_run</span><span class="p">:</span> - <span class="bp">self</span><span class="o">.</span><span class="n">logger</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s2">"Executing command: </span><span class="si">{}</span><span class="s2">"</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">command</span><span class="p">))</span> + <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s2">"Executing command: </span><span class="si">%s</span><span class="s2">"</span><span class="p">,</span> <span class="n">command</span><span class="p">)</span> <span class="k">try</span><span class="p">:</span> <span class="n">subprocess</span><span class="o">.</span><span class="n">check_call</span><span class="p">(</span><span class="n">command</span><span class="p">,</span> <span class="n">shell</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span> <span class="bp">self</span><span class="o">.</span><span class="n">change_state</span><span class="p">(</span><span class="n">key</span><span class="p">,</span> <span class="n">State</span><span class="o">.</span><span class="n">SUCCESS</span><span class="p">)</span> <span class="k">except</span> <span class="n">subprocess</span><span class="o">.</span><span class="n">CalledProcessError</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">change_state</span><span class="p">(</span><span class="n">key</span><span class="p">,</span> <span class="n">State</span><span class="o">.</span><span class="n">FAILED</span><span class="p">)</span> - <span class="bp">self</span><span class="o">.</span><span class="n">logger</span><span class="o">.</span><span class="n">error</span><span class="p">(</span><span class="s2">"Failed to execute task </span><span class="si">{}</span><span class="s2">:"</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="nb">str</span><span class="p">(</span><span class="n">e</span><span class="p">)))</span> + <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">error</span><span class="p">(</span><span class="s2">"Failed to execute task </span><span class="si">%s</span><span class="s2">."</span><span class="p">,</span> <span class="nb">str</span><span class="p">(</span><span class="n">e</span><span class="p">))</span> <span class="bp">self</span><span class="o">.</span><span class="n">commands_to_run</span> <span class="o">=</span> <span class="p">[]</span> http://git-wip-us.apache.org/repos/asf/incubator-airflow-site/blob/28a3eb60/_modules/airflow/hooks/S3_hook.html ---------------------------------------------------------------------- diff --git a/_modules/airflow/hooks/S3_hook.html b/_modules/airflow/hooks/S3_hook.html new file mode 100644 index 0000000..f1c0617 --- /dev/null +++ b/_modules/airflow/hooks/S3_hook.html @@ -0,0 +1,489 @@ + + +<!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>airflow.hooks.S3_hook — Airflow Documentation</title> + + + + + + + + + + + + + + + + + + <link rel="stylesheet" href="../../../_static/css/theme.css" type="text/css" /> + + + + + + <link rel="index" title="Index" + href="../../../genindex.html"/> + <link rel="search" title="Search" href="../../../search.html"/> + <link rel="top" title="Airflow Documentation" href="../../../index.html"/> + <link rel="up" title="Module code" href="../../index.html"/> + + + <script src="../../../_static/js/modernizr.min.js"></script> + +</head> + +<body class="wy-body-for-nav" role="document"> + + + <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"> Airflow + + + + </a> + + + + + + + +<div role="search"> + <form id="rtd-search-form" class="wy-form" action="../../../search.html" method="get"> + <input type="text" name="q" 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airflow.hooks.S3_hook</h1><div class="highlight"><pre> +<span></span><span class="c1"># -*- coding: utf-8 -*-</span> +<span class="c1">#</span> +<span class="c1"># Licensed under the Apache License, Version 2.0 (the "License");</span> +<span class="c1"># you may not use this file except in compliance with the License.</span> +<span class="c1"># 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="kn">from</span> <span class="nn">airflow.exceptions</span> <span class="k">import</span> <span class="n">AirflowException</span> +<span class="kn">from</span> <span class="nn">airflow.contrib.hooks.aws_hook</span> <span class="k">import</span> <span class="n">AwsHook</span> + +<span class="kn">from</span> <span class="nn">six</span> <span class="k">import</span> <span class="n">BytesIO</span> +<span class="kn">from</span> <span class="nn">urllib.parse</span> <span class="k">import</span> <span class="n">urlparse</span> +<span class="kn">import</span> <span class="nn">re</span> +<span class="kn">import</span> <span class="nn">fnmatch</span> + +<div class="viewcode-block" id="S3Hook"><a class="viewcode-back" href="../../../integration.html#airflow.hooks.S3_hook.S3Hook">[docs]</a><span class="k">class</span> <span class="nc">S3Hook</span><span class="p">(</span><span class="n">AwsHook</span><span class="p">):</span> + <span class="sd">"""</span> +<span class="sd"> Interact with AWS S3, using the boto3 library.</span> +<span class="sd"> """</span> + + <span class="k">def</span> <span class="nf">get_conn</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">get_client_type</span><span class="p">(</span><span class="s1">'s3'</span><span class="p">)</span> + + <span class="nd">@staticmethod</span> + <span class="k">def</span> <span class="nf">parse_s3_url</span><span class="p">(</span><span class="n">s3url</span><span class="p">):</span> + <span class="n">parsed_url</span> <span class="o">=</span> <span class="n">urlparse</span><span class="p">(</span><span class="n">s3url</span><span class="p">)</span> + <span class="k">if</span> <span class="ow">not</span> <span class="n">parsed_url</span><span class="o">.</span><span class="n">netloc</span><span class="p">:</span> + <span class="k">raise</span> <span class="n">AirflowException</span><span class="p">(</span><span class="s1">'Please provide a bucket_name'</span><span class="p">)</span> + <span class="k">else</span><span class="p">:</span> + <span class="n">bucket_name</span> <span class="o">=</span> <span class="n">parsed_url</span><span class="o">.</span><span class="n">netloc</span> + <span class="n">key</span> <span class="o">=</span> <span class="n">parsed_url</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">strip</span><span class="p">(</span><span class="s1">'/'</span><span class="p">)</span> + <span class="k">return</span> <span class="p">(</span><span class="n">bucket_name</span><span class="p">,</span> <span class="n">key</span><span class="p">)</span> + + <span class="k">def</span> <span class="nf">check_for_bucket</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">bucket_name</span><span class="p">):</span> + <span class="sd">"""</span> +<span class="sd"> Check if bucket_name exists.</span> + +<span class="sd"> :param bucket_name: the name of the bucket</span> +<span class="sd"> :type bucket_name: str</span> +<span class="sd"> """</span> + <span class="k">try</span><span class="p">:</span> + <span class="bp">self</span><span class="o">.</span><span class="n">get_conn</span><span class="p">()</span><span class="o">.</span><span class="n">head_bucket</span><span class="p">(</span><span class="n">Bucket</span><span class="o">=</span><span class="n">bucket_name</span><span class="p">)</span> + <span class="k">return</span> <span class="kc">True</span> + <span class="k">except</span><span class="p">:</span> + <span class="k">return</span> <span class="kc">False</span> + + <span class="k">def</span> <span class="nf">get_bucket</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">bucket_name</span><span class="p">):</span> + <span class="sd">"""</span> +<span class="sd"> Returns a boto3.S3.Bucket object</span> + +<span class="sd"> :param bucket_name: the name of the bucket</span> +<span class="sd"> :type bucket_name: str</span> +<span class="sd"> """</span> + <span class="n">s3</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_resource_type</span><span class="p">(</span><span class="s1">'s3'</span><span class="p">)</span> + <span class="k">return</span> <span class="n">s3</span><span class="o">.</span><span class="n">Bucket</span><span class="p">(</span><span class="n">bucket_name</span><span class="p">)</span> + + <span class="k">def</span> <span class="nf">check_for_prefix</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">bucket_name</span><span class="p">,</span> <span class="n">prefix</span><span class="p">,</span> <span class="n">delimiter</span><span class="p">):</span> + <span class="sd">"""</span> +<span class="sd"> Checks that a prefix exists in a bucket</span> +<span class="sd"> """</span> + <span class="n">prefix</span> <span class="o">=</span> <span class="n">prefix</span> <span class="o">+</span> <span class="n">delimiter</span> <span class="k">if</span> <span class="n">prefix</span><span class="p">[</span><span class="o">-</span><span class="mi">1</span><span class="p">]</span> <span class="o">!=</span> <span class="n">delimiter</span> <span class="k">else</span> <span class="n">prefix</span> + <span class="n">prefix_split</span> <span class="o">=</span> <span class="n">re</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="sa">r</span><span class="s1">'(\w+[</span><span class="si">{d}</span><span class="s1">])$'</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">d</span><span class="o">=</span><span class="n">delimiter</span><span class="p">),</span> <span class="n">prefix</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span> + <span class="n">previous_level</span> <span class="o">=</span> <span class="n">prefix_split</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> + <span class="n">plist</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">list_prefixes</span><span class="p">(</span><span class="n">bucket_name</span><span class="p">,</span> <span class="n">previous_level</span><span class="p">,</span> <span class="n">delimiter</span><span class="p">)</span> + <span class="k">return</span> <span class="kc">False</span> <span class="k">if</span> <span class="n">plist</span> <span class="ow">is</span> <span class="kc">None</span> <span class="k">else</span> <span class="n">prefix</span> <span class="ow">in</span> <span class="n">plist</span> + + <span class="k">def</span> <span class="nf">list_prefixes</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">bucket_name</span><span class="p">,</span> <span class="n">prefix</span><span class="o">=</span><span class="s1">''</span><span class="p">,</span> <span class="n">delimiter</span><span class="o">=</span><span class="s1">''</span><span class="p">):</span> + <span class="sd">"""</span> +<span class="sd"> Lists prefixes in a bucket under prefix</span> + +<span class="sd"> :param bucket_name: the name of the bucket</span> +<span class="sd"> :type bucket_name: str</span> +<span class="sd"> :param prefix: a key prefix</span> +<span class="sd"> :type prefix: str</span> +<span class="sd"> :param delimiter: the delimiter marks key hierarchy.</span> +<span class="sd"> :type delimiter: str</span> +<span class="sd"> """</span> + <span class="n">response</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_conn</span><span class="p">()</span><span class="o">.</span><span class="n">list_objects_v2</span><span class="p">(</span><span class="n">Bucket</span><span class="o">=</span><span class="n">bucket_name</span><span class="p">,</span> + <span class="n">Prefix</span><span class="o">=</span><span class="n">prefix</span><span class="p">,</span> + <span class="n">Delimiter</span><span class="o">=</span><span class="n">delimiter</span><span class="p">)</span> + <span class="k">return</span> <span class="p">[</span><span class="n">p</span><span class="p">[</span><span class="s1">'Prefix'</span><span class="p">]</span> <span class="k">for</span> <span class="n">p</span> <span class="ow">in</span> <span class="n">response</span><span class="p">[</span><span class="s1">'CommonPrefixes'</span><span class="p">]]</span> <span class="k">if</span> <span class="n">response</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">'CommonPrefixes'</span><span class="p">)</span> <span class="k">else</span> <span class="kc">None</span> + + <span class="k">def</span> <span class="nf">list_keys</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">bucket_name</span><span class="p">,</span> <span class="n">prefix</span><span class="o">=</span><span class="s1">''</span><span class="p">,</span> <span class="n">delimiter</span><span class="o">=</span><span class="s1">''</span><span class="p">):</span> + <span class="sd">"""</span> +<span class="sd"> Lists keys in a bucket under prefix and not containing delimiter</span> + +<span class="sd"> :param bucket_name: the name of the bucket</span> +<span class="sd"> :type bucket_name: str</span> +<span class="sd"> :param prefix: a key prefix</span> +<span class="sd"> :type prefix: str</span> +<span class="sd"> :param delimiter: the delimiter marks key hierarchy.</span> +<span class="sd"> :type delimiter: str</span> +<span class="sd"> """</span> + <span class="n">response</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_conn</span><span class="p">()</span><span class="o">.</span><span class="n">list_objects_v2</span><span class="p">(</span><span class="n">Bucket</span><span class="o">=</span><span class="n">bucket_name</span><span class="p">,</span> + <span class="n">Prefix</span><span class="o">=</span><span class="n">prefix</span><span class="p">,</span> + <span class="n">Delimiter</span><span class="o">=</span><span class="n">delimiter</span><span class="p">)</span> + <span class="k">return</span> <span class="p">[</span><span class="n">k</span><span class="p">[</span><span class="s1">'Key'</span><span class="p">]</span> <span class="k">for</span> <span class="n">k</span> <span class="ow">in</span> <span class="n">response</span><span class="p">[</span><span class="s1">'Contents'</span><span class="p">]]</span> <span class="k">if</span> <span class="n">response</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">'Contents'</span><span class="p">)</span> <span class="k">else</span> <span class="kc">None</span> + + <span class="k">def</span> <span class="nf">check_for_key</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">key</span><span class="p">,</span> <span class="n">bucket_name</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span> + <span class="sd">"""</span> +<span class="sd"> Checks if a key exists in a bucket</span> + +<span class="sd"> :param key: S3 key that will point to the file</span> +<span class="sd"> :type key: str</span> +<span class="sd"> :param bucket_name: Name of the bucket in which the file is stored</span> +<span class="sd"> :type bucket_name: str</span> +<span class="sd"> """</span> + <span class="k">if</span> <span class="ow">not</span> <span class="n">bucket_name</span><span class="p">:</span> + <span class="p">(</span><span class="n">bucket_name</span><span class="p">,</span> <span class="n">key</span><span class="p">)</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">parse_s3_url</span><span class="p">(</span><span class="n">key</span><span class="p">)</span> + + <span class="k">try</span><span class="p">:</span> + <span class="bp">self</span><span class="o">.</span><span class="n">get_conn</span><span class="p">()</span><span class="o">.</span><span class="n">head_object</span><span class="p">(</span><span class="n">Bucket</span><span class="o">=</span><span class="n">bucket_name</span><span class="p">,</span> <span class="n">Key</span><span class="o">=</span><span class="n">key</span><span class="p">)</span> + <span class="k">return</span> <span class="kc">True</span> + <span class="k">except</span><span class="p">:</span> + <span class="k">return</span> <span class="kc">False</span> + + <span class="k">def</span> <span class="nf">get_key</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">key</span><span class="p">,</span> <span class="n">bucket_name</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span> + <span class="sd">"""</span> +<span class="sd"> Returns a boto3.s3.Object</span> + +<span class="sd"> :param key: the path to the key</span> +<span class="sd"> :type key: str</span> +<span class="sd"> :param bucket_name: the name of the bucket</span> +<span class="sd"> :type bucket_name: str</span> +<span class="sd"> """</span> + <span class="k">if</span> <span class="ow">not</span> <span class="n">bucket_name</span><span class="p">:</span> + <span class="p">(</span><span class="n">bucket_name</span><span class="p">,</span> <span class="n">key</span><span class="p">)</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">parse_s3_url</span><span class="p">(</span><span class="n">key</span><span class="p">)</span> + + <span class="n">obj</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_resource_type</span><span class="p">(</span><span class="s1">'s3'</span><span class="p">)</span><span class="o">.</span><span class="n">Object</span><span class="p">(</span><span class="n">bucket_name</span><span class="p">,</span> <span class="n">key</span><span class="p">)</span> + <span class="n">obj</span><span class="o">.</span><span class="n">load</span><span class="p">()</span> + <span class="k">return</span> <span class="n">obj</span> + + <span class="k">def</span> <span class="nf">read_key</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">key</span><span class="p">,</span> <span class="n">bucket_name</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span> + <span class="sd">"""</span> +<span class="sd"> Reads a key from S3</span> + +<span class="sd"> :param key: S3 key that will point to the file</span> +<span class="sd"> :type key: str</span> +<span class="sd"> :param bucket_name: Name of the bucket in which the file is stored</span> +<span class="sd"> :type bucket_name: str</span> +<span class="sd"> """</span> + + <span class="n">obj</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_key</span><span class="p">(</span><span class="n">key</span><span class="p">,</span> <span class="n">bucket_name</span><span class="p">)</span> + <span class="k">return</span> <span class="n">obj</span><span class="o">.</span><span class="n">get</span><span class="p">()[</span><span class="s1">'Body'</span><span class="p">]</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="k">def</span> <span class="nf">check_for_wildcard_key</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> + <span class="n">wildcard_key</span><span class="p">,</span> <span class="n">bucket_name</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">delimiter</span><span class="o">=</span><span class="s1">''</span><span class="p">):</span> + <span class="sd">"""</span> +<span class="sd"> Checks that a key matching a wildcard expression exists in a bucket</span> +<span class="sd"> """</span> + <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_wildcard_key</span><span class="p">(</span><span class="n">wildcard_key</span><span class="o">=</span><span class="n">wildcard_key</span><span class="p">,</span> + <span class="n">bucket_name</span><span class="o">=</span><span class="n">bucket_name</span><span class="p">,</span> + <span class="n">delimiter</span><span class="o">=</span><span class="n">delimiter</span><span class="p">)</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span> + + <span class="k">def</span> <span class="nf">get_wildcard_key</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">wildcard_key</span><span class="p">,</span> <span class="n">bucket_name</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">delimiter</span><span class="o">=</span><span class="s1">''</span><span class="p">):</span> + <span class="sd">"""</span> +<span class="sd"> Returns a boto3.s3.Object object matching the regular expression</span> + +<span class="sd"> :param regex_key: the path to the key</span> +<span class="sd"> :type regex_key: str</span> +<span class="sd"> :param bucket_name: the name of the bucket</span> +<span class="sd"> :type bucket_name: str</span> +<span class="sd"> """</span> + <span class="k">if</span> <span class="ow">not</span> <span class="n">bucket_name</span><span class="p">:</span> + <span class="p">(</span><span class="n">bucket_name</span><span class="p">,</span> <span class="n">wildcard_key</span><span class="p">)</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">parse_s3_url</span><span class="p">(</span><span class="n">wildcard_key</span><span class="p">)</span> + + <span class="n">prefix</span> <span class="o">=</span> <span class="n">re</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="sa">r</span><span class="s1">'[*]'</span><span class="p">,</span> <span class="n">wildcard_key</span><span class="p">,</span> <span class="mi">1</span><span class="p">)[</span><span class="mi">0</span><span class="p">]</span> + <span class="n">klist</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">list_keys</span><span class="p">(</span><span class="n">bucket_name</span><span class="p">,</span> <span class="n">prefix</span><span class="o">=</span><span class="n">prefix</span><span class="p">,</span> <span class="n">delimiter</span><span class="o">=</span><span class="n">delimiter</span><span class="p">)</span> + <span class="k">if</span> <span class="n">klist</span><span class="p">:</span> + <span class="n">key_matches</span> <span class="o">=</span> <span class="p">[</span><span class="n">k</span> <span class="k">for</span> <span class="n">k</span> <span class="ow">in</span> <span class="n">klist</span> <span class="k">if</span> <span class="n">fnmatch</span><span class="o">.</span><span class="n">fnmatch</span><span class="p">(</span><span class="n">k</span><span class="p">,</span> <span class="n">wildcard_key</span><span class="p">)]</span> + <span class="k">if</span> <span class="n">key_matches</span><span class="p">:</span> + <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_key</span><span class="p">(</span><span class="n">key_matches</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">bucket_name</span><span class="p">)</span> + + <span class="k">def</span> <span class="nf">load_file</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> + <span class="n">filename</span><span class="p">,</span> + <span class="n">key</span><span class="p">,</span> + <span class="n">bucket_name</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> + <span class="n">replace</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> + <span class="n">encrypt</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span> + <span class="sd">"""</span> +<span class="sd"> Loads a local file to S3</span> + +<span class="sd"> :param filename: name of the file to load.</span> +<span class="sd"> :type filename: str</span> +<span class="sd"> :param key: S3 key that will point to the file</span> +<span class="sd"> :type key: str</span> +<span class="sd"> :param bucket_name: Name of the bucket in which to store the file</span> +<span class="sd"> :type bucket_name: str</span> +<span class="sd"> :param replace: A flag to decide whether or not to overwrite the key</span> +<span class="sd"> if it already exists. If replace is False and the key exists, an</span> +<span class="sd"> error will be raised.</span> +<span class="sd"> :type replace: bool</span> +<span class="sd"> :param encrypt: If True, the file will be encrypted on the server-side</span> +<span class="sd"> by S3 and will be stored in an encrypted form while at rest in S3.</span> +<span class="sd"> :type encrypt: bool</span> +<span class="sd"> """</span> + <span class="k">if</span> <span class="ow">not</span> <span class="n">bucket_name</span><span class="p">:</span> + <span class="p">(</span><span class="n">bucket_name</span><span class="p">,</span> <span class="n">key</span><span class="p">)</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">parse_s3_url</span><span class="p">(</span><span class="n">key</span><span class="p">)</span> + + <span class="k">if</span> <span class="ow">not</span> <span class="n">replace</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">check_for_key</span><span class="p">(</span><span class="n">key</span><span class="p">,</span> <span class="n">bucket_name</span><span class="p">):</span> + <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s2">"The key </span><span class="si">{key}</span><span class="s2"> already exists."</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">key</span><span class="o">=</span><span class="n">key</span><span class="p">))</span> + + <span class="n">extra_args</span><span class="o">=</span><span class="p">{}</span> + <span class="k">if</span> <span class="n">encrypt</span><span class="p">:</span> + <span class="n">extra_args</span><span class="p">[</span><span class="s1">'ServerSideEncryption'</span><span class="p">]</span> <span class="o">=</span> <span class="s2">"AES256"</span> + + <span class="n">client</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_conn</span><span class="p">()</span> + <span class="n">client</span><span class="o">.</span><span class="n">upload_file</span><span class="p">(</span><span class="n">filename</span><span class="p">,</span> <span class="n">bucket_name</span><span class="p">,</span> <span class="n">key</span><span class="p">,</span> <span class="n">ExtraArgs</span><span class="o">=</span><span class="n">extra_args</span><span class="p">)</span> + + <span class="k">def</span> <span class="nf">load_string</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> + <span class="n">string_data</span><span class="p">,</span> + <span class="n">key</span><span class="p">,</span> + <span class="n">bucket_name</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> + <span class="n">replace</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> + <span class="n">encrypt</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> + <span class="n">encoding</span><span class="o">=</span><span class="s1">'utf-8'</span><span class="p">):</span> + <span class="sd">"""</span> +<span class="sd"> Loads a string to S3</span> + +<span class="sd"> This is provided as a convenience to drop a string in S3. It uses the</span> +<span class="sd"> boto infrastructure to ship a file to s3. </span> + +<span class="sd"> :param string_data: string to set as content for the key.</span> +<span class="sd"> :type string_data: str</span> +<span class="sd"> :param key: S3 key that will point to the file</span> +<span class="sd"> :type key: str</span> +<span class="sd"> :param bucket_name: Name of the bucket in which to store the file</span> +<span class="sd"> :type bucket_name: str</span> +<span class="sd"> :param replace: A flag to decide whether or not to overwrite the key</span> +<span class="sd"> if it already exists</span> +<span class="sd"> :type replace: bool</span> +<span class="sd"> :param encrypt: If True, the file will be encrypted on the server-side</span> +<span class="sd"> by S3 and will be stored in an encrypted form while at rest in S3.</span> +<span class="sd"> :type encrypt: bool</span> +<span class="sd"> """</span> + <span class="k">if</span> <span class="ow">not</span> <span class="n">bucket_name</span><span class="p">:</span> + <span class="p">(</span><span class="n">bucket_name</span><span class="p">,</span> <span class="n">key</span><span class="p">)</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">parse_s3_url</span><span class="p">(</span><span class="n">key</span><span class="p">)</span> + + <span class="k">if</span> <span class="ow">not</span> <span class="n">replace</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">check_for_key</span><span class="p">(</span><span class="n">key</span><span class="p">,</span> <span class="n">bucket_name</span><span class="p">):</span> + <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s2">"The key </span><span class="si">{key}</span><span class="s2"> already exists."</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">key</span><span class="o">=</span><span class="n">key</span><span class="p">))</span> + + <span class="n">extra_args</span><span class="o">=</span><span class="p">{}</span> + <span class="k">if</span> <span class="n">encrypt</span><span class="p">:</span> + <span class="n">extra_args</span><span class="p">[</span><span class="s1">'ServerSideEncryption'</span><span class="p">]</span> <span class="o">=</span> <span class="s2">"AES256"</span> + + <span class="n">filelike_buffer</span> <span class="o">=</span> <span class="n">BytesIO</span><span class="p">(</span><span class="n">string_data</span><span class="o">.</span><span class="n">encode</span><span class="p">(</span><span class="n">encoding</span><span class="p">))</span> + + <span class="n">client</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_conn</span><span class="p">()</span> + <span class="n">client</span><span class="o">.</span><span class="n">upload_fileobj</span><span class="p">(</span><span class="n">filelike_buffer</span><span class="p">,</span> <span class="n">bucket_name</span><span class="p">,</span> <span class="n">key</span><span class="p">,</span> <span class="n">ExtraArgs</span><span class="o">=</span><span class="n">extra_args</span><span class="p">)</span></div> +</pre></div> + + </div> + <div class="articleComments"> + + </div> + </div> + <footer> + + + <hr/> + + <div role="contentinfo"> + <p> + + </p> + </div> + Built with <a href="http://sphinx-doc.org/";>Sphinx</a> using a <a href="https://github.com/snide/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"> + var DOCUMENTATION_OPTIONS = { + URL_ROOT:'../../../', + VERSION:'', + COLLAPSE_INDEX:false, + FILE_SUFFIX:'.html', + HAS_SOURCE: true, + SOURCELINK_SUFFIX: '.txt' + }; + </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/js/theme.js"></script> + + + + + <script type="text/javascript"> + jQuery(function () { + SphinxRtdTheme.StickyNav.enable(); + }); + </script> + + +</body> +</html> \ No newline at end of file http://git-wip-us.apache.org/repos/asf/incubator-airflow-site/blob/28a3eb60/_modules/airflow/macros.html ---------------------------------------------------------------------- diff --git a/_modules/airflow/macros.html b/_modules/airflow/macros.html index 34826d7..48eb480 100644 --- a/_modules/airflow/macros.html +++ b/_modules/airflow/macros.html @@ -13,6 +13,8 @@ + + @@ -80,7 +82,10 @@ - <ul> + + + + <ul> <li class="toctree-l1"><a class="reference internal" href="../../project.html">Project</a></li> <li class="toctree-l1"><a class="reference internal" href="../../license.html">License</a></li> <li class="toctree-l1"><a class="reference internal" href="../../start.html">Quick Start</a></li> @@ -177,7 +182,6 @@ <span class="c1"># limitations under the License.</span> <span class="kn">from</span> <span class="nn">__future__</span> <span class="k">import</span> <span class="n">absolute_import</span> -<span class="kn">from</span> <span class="nn">random</span> <span class="k">import</span> <span class="n">random</span> <span class="kn">from</span> <span class="nn">datetime</span> <span class="k">import</span> <span class="n">datetime</span><span class="p">,</span> <span class="n">timedelta</span> <span class="kn">import</span> <span class="nn">dateutil</span> <span class="kn">import</span> <span class="nn">time</span> @@ -231,7 +235,7 @@ <span class="kn">import</span> <span class="nn">sys</span> <span class="kn">from</span> <span class="nn">airflow.plugins_manager</span> <span class="k">import</span> <span class="n">macros_modules</span> <span class="k">for</span> <span class="n">macros_module</span> <span class="ow">in</span> <span class="n">macros_modules</span><span class="p">:</span> - <span class="n">sys</span><span class="o">.</span><span class="n">modules</span><span class="p">[</span><span class="n">macros_module</span><span class="o">.</span><span class="n">__name__</span><span class="p">]</span> <span class="o">=</span> <span class="n">macros_module</span> + <span class="n">sys</span><span class="o">.</span><span class="n">modules</span><span class="p">[</span><span class="n">macros_module</span><span class="o">.</span><span class="vm">__name__</span><span class="p">]</span> <span class="o">=</span> <span class="n">macros_module</span> <span class="nb">globals</span><span class="p">()[</span><span class="n">macros_module</span><span class="o">.</span><span class="n">_name</span><span class="p">]</span> <span class="o">=</span> <span class="n">macros_module</span> <span class="c1">##########################################################</span> @@ -241,7 +245,7 @@ <span class="k">if</span> <span class="ow">not</span> <span class="n">_os</span><span class="o">.</span><span class="n">environ</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">'AIRFLOW_USE_NEW_IMPORTS'</span><span class="p">,</span> <span class="kc">False</span><span class="p">):</span> <span class="kn">from</span> <span class="nn">zope.deprecation</span> <span class="k">import</span> <span class="n">deprecated</span> <span class="k">as</span> <span class="n">_deprecated</span> <span class="k">for</span> <span class="n">_macro</span> <span class="ow">in</span> <span class="n">macros_module</span><span class="o">.</span><span class="n">_objects</span><span class="p">:</span> - <span class="n">macro_name</span> <span class="o">=</span> <span class="n">_macro</span><span class="o">.</span><span class="n">__name__</span> + <span class="n">macro_name</span> <span class="o">=</span> <span class="n">_macro</span><span class="o">.</span><span class="vm">__name__</span> <span class="nb">globals</span><span class="p">()[</span><span class="n">macro_name</span><span class="p">]</span> <span class="o">=</span> <span class="n">_macro</span> <span class="n">_deprecated</span><span class="p">(</span> <span class="n">macro_name</span><span class="p">,</span> http://git-wip-us.apache.org/repos/asf/incubator-airflow-site/blob/28a3eb60/_modules/airflow/macros/hive.html ---------------------------------------------------------------------- diff --git a/_modules/airflow/macros/hive.html b/_modules/airflow/macros/hive.html index 8d13632..ba316f6 100644 --- a/_modules/airflow/macros/hive.html +++ b/_modules/airflow/macros/hive.html @@ -13,6 +13,8 @@ + + @@ -80,7 +82,10 @@ - <ul> + + + + <ul> <li class="toctree-l1"><a class="reference internal" href="../../../project.html">Project</a></li> <li class="toctree-l1"><a class="reference internal" href="../../../license.html">License</a></li> <li class="toctree-l1"><a class="reference internal" href="../../../start.html">Quick Start</a></li> @@ -227,8 +232,8 @@ <span class="sd"> :returns: The closest date</span> <span class="sd"> :rtype: datetime.date or None</span> <span class="sd"> '''</span> - <span class="n">fb</span> <span class="o">=</span> <span class="k">lambda</span> <span class="n">d</span><span class="p">:</span> <span class="n">d</span> <span class="o">-</span> <span class="n">target_dt</span> <span class="k">if</span> <span class="n">d</span> <span class="o">>=</span> <span class="n">target_dt</span> <span class="k">else</span> <span class="n">datetime</span><span class="o">.</span><span class="n">timedelta</span><span class="o">.</span><span class="n">max</span> - <span class="n">fa</span> <span class="o">=</span> <span class="k">lambda</span> <span class="n">d</span><span class="p">:</span> <span class="n">d</span> <span class="o">-</span> <span class="n">target_dt</span> <span class="k">if</span> <span class="n">d</span> <span class="o"><=</span> <span class="n">target_dt</span> <span class="k">else</span> <span class="n">datetime</span><span class="o">.</span><span class="n">timedelta</span><span class="o">.</span><span class="n">min</span> + <span class="n">fb</span> <span class="o">=</span> <span class="k">lambda</span> <span class="n">d</span><span class="p">:</span> <span class="n">target_dt</span> <span class="o">-</span> <span class="n">d</span> <span class="k">if</span> <span class="n">d</span> <span class="o"><=</span> <span class="n">target_dt</span> <span class="k">else</span> <span class="n">datetime</span><span class="o">.</span><span class="n">timedelta</span><span class="o">.</span><span class="n">max</span> + <span class="n">fa</span> <span class="o">=</span> <span class="k">lambda</span> <span class="n">d</span><span class="p">:</span> <span class="n">d</span> <span class="o">-</span> <span class="n">target_dt</span> <span class="k">if</span> <span class="n">d</span> <span class="o">>=</span> <span class="n">target_dt</span> <span class="k">else</span> <span class="n">datetime</span><span class="o">.</span><span class="n">timedelta</span><span class="o">.</span><span class="n">max</span> <span class="n">fnone</span> <span class="o">=</span> <span class="k">lambda</span> <span class="n">d</span><span class="p">:</span> <span class="n">target_dt</span> <span class="o">-</span> <span class="n">d</span> <span class="k">if</span> <span class="n">d</span> <span class="o"><</span> <span class="n">target_dt</span> <span class="k">else</span> <span class="n">d</span> <span class="o">-</span> <span class="n">target_dt</span> <span class="k">if</span> <span class="n">before_target</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> <span class="k">return</span> <span class="nb">min</span><span class="p">(</span><span class="n">date_list</span><span class="p">,</span> <span class="n">key</span><span class="o">=</span><span class="n">fnone</span><span class="p">)</span><span class="o">.</span><span class="n">date</span><span class="p">()</span>
