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   <h1>Source code for apache_beam.io.localfilesystem</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 &quot;License&quot;); 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 &quot;AS IS&quot; 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">&quot;&quot;&quot;Local File system implementation for accessing files on disk.&quot;&quot;&quot;</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">import</span> <span class="nn">os</span>
 <span class="kn">import</span> <span class="nn">shutil</span>
 <span class="kn">from</span> <span class="nn">builtins</span> <span class="k">import</span> <span class="nb">zip</span>

 <span class="kn">from</span> <span class="nn">apache_beam.io.filesystem</span> <span class="k">import</span> <span class="n">BeamIOError</span>
 <span class="kn">from</span> <span class="nn">apache_beam.io.filesystem</span> <span class="k">import</span> <span class="n">CompressedFile</span>
 <span class="kn">from</span> <span class="nn">apache_beam.io.filesystem</span> <span class="k">import</span> <span class="n">CompressionTypes</span>
 <span class="kn">from</span> <span class="nn">apache_beam.io.filesystem</span> <span class="k">import</span> <span class="n">FileMetadata</span>
 <span class="kn">from</span> <span class="nn">apache_beam.io.filesystem</span> <span class="k">import</span> <span class="n">FileSystem</span>

 <span class="n">__all__</span> <span class="o">=</span> <span class="p">[</span><span class="s1">&#39;LocalFileSystem&#39;</span><span class="p">]</span>


 <div class="viewcode-block" id="LocalFileSystem"><a class="viewcode-back" href="../../../apache_beam.io.localfilesystem.html#apache_beam.io.localfilesystem.LocalFileSystem">[docs]</a><span class="k">class</span> <span class="nc">LocalFileSystem</span><span class="p">(</span><span class="n">FileSystem</span><span class="p">):</span>
   <span class="sd">&quot;&quot;&quot;A Local ``FileSystem`` implementation for accessing files on disk.</span>
 <span class="sd">  &quot;&quot;&quot;</span>
 <div class="viewcode-block" id="LocalFileSystem.scheme"><a class="viewcode-back" href="../../../apache_beam.io.localfilesystem.html#apache_beam.io.localfilesystem.LocalFileSystem.scheme">[docs]</a>  <span class="nd">@classmethod</span>
   <span class="k">def</span> <span class="nf">scheme</span><span class="p">(</span><span class="bp">cls</span><span class="p">):</span>
     <span class="sd">&quot;&quot;&quot;URI scheme for the FileSystem</span>
 <span class="sd">    &quot;&quot;&quot;</span>
     <span class="k">return</span> <span class="kc">None</span></div>

 <div class="viewcode-block" id="LocalFileSystem.join"><a class="viewcode-back" href="../../../apache_beam.io.localfilesystem.html#apache_beam.io.localfilesystem.LocalFileSystem.join">[docs]</a>  <span class="k">def</span> <span class="nf">join</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">basepath</span><span class="p">,</span> <span class="o">*</span><span class="n">paths</span><span class="p">):</span>
     <span class="sd">&quot;&quot;&quot;Join two or more pathname components for the filesystem</span>

 <span class="sd">    Args:</span>
 <span class="sd">      basepath: string path of the first component of the path</span>
 <span class="sd">      paths: path components to be added</span>

 <span class="sd">    Returns: full path after combining all the passed components</span>
 <span class="sd">    &quot;&quot;&quot;</span>
     <span class="k">return</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">basepath</span><span class="p">,</span> <span class="o">*</span><span class="n">paths</span><span class="p">)</span></div>

 <div class="viewcode-block" id="LocalFileSystem.split"><a class="viewcode-back" href="../../../apache_beam.io.localfilesystem.html#apache_beam.io.localfilesystem.LocalFileSystem.split">[docs]</a>  <span class="k">def</span> <span class="nf">split</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">path</span><span class="p">):</span>
     <span class="sd">&quot;&quot;&quot;Splits the given path into two parts.</span>

 <span class="sd">    Splits the path into a pair (head, tail) such that tail contains the last</span>
 <span class="sd">    component of the path and head contains everything up to that.</span>

 <span class="sd">    Args:</span>
 <span class="sd">      path: path as a string</span>
 <span class="sd">    Returns:</span>
 <span class="sd">      a pair of path components as strings.</span>
 <span class="sd">    &quot;&quot;&quot;</span>
     <span class="k">return</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">abspath</span><span class="p">(</span><span class="n">path</span><span class="p">))</span></div>

 <div class="viewcode-block" id="LocalFileSystem.mkdirs"><a class="viewcode-back" href="../../../apache_beam.io.localfilesystem.html#apache_beam.io.localfilesystem.LocalFileSystem.mkdirs">[docs]</a>  <span class="k">def</span> <span class="nf">mkdirs</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">path</span><span class="p">):</span>
     <span class="sd">&quot;&quot;&quot;Recursively create directories for the provided path.</span>

 <span class="sd">    Args:</span>
 <span class="sd">      path: string path of the directory structure that should be created</span>

 <span class="sd">    Raises:</span>
 <span class="sd">      IOError if leaf directory already exists.</span>
 <span class="sd">    &quot;&quot;&quot;</span>
     <span class="k">try</span><span class="p">:</span>
       <span class="n">os</span><span class="o">.</span><span class="n">makedirs</span><span class="p">(</span><span class="n">path</span><span class="p">)</span>
     <span class="k">except</span> <span class="ne">OSError</span> <span class="k">as</span> <span class="n">err</span><span class="p">:</span>
       <span class="k">raise</span> <span class="ne">IOError</span><span class="p">(</span><span class="n">err</span><span class="p">)</span></div>

 <div class="viewcode-block" id="LocalFileSystem.has_dirs"><a class="viewcode-back" href="../../../apache_beam.io.localfilesystem.html#apache_beam.io.localfilesystem.LocalFileSystem.has_dirs">[docs]</a>  <span class="k">def</span> <span class="nf">has_dirs</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
     <span class="sd">&quot;&quot;&quot;Whether this FileSystem supports directories.&quot;&quot;&quot;</span>
     <span class="k">return</span> <span class="kc">True</span></div>

   <span class="k">def</span> <span class="nf">_url_dirname</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">url_or_path</span><span class="p">):</span>
     <span class="sd">&quot;&quot;&quot;Pass through to os.path.dirname.</span>

 <span class="sd">    This version uses os.path instead of posixpath to be compatible with the</span>
 <span class="sd">    host OS.</span>

 <span class="sd">    Args:</span>
 <span class="sd">      url_or_path: A string in the form of /some/path.</span>
 <span class="sd">    &quot;&quot;&quot;</span>
     <span class="k">return</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">dirname</span><span class="p">(</span><span class="n">url_or_path</span><span class="p">)</span>

   <span class="k">def</span> <span class="nf">_list</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">dir_or_prefix</span><span class="p">):</span>
     <span class="sd">&quot;&quot;&quot;List files in a location.</span>

 <span class="sd">    Listing is non-recursive, for filesystems that support directories.</span>

 <span class="sd">    Args:</span>
 <span class="sd">      dir_or_prefix: (string) A directory or location prefix (for filesystems</span>
 <span class="sd">        that don&#39;t have directories).</span>

 <span class="sd">    Returns:</span>
 <span class="sd">      Generator of ``FileMetadata`` objects.</span>

 <span class="sd">    Raises:</span>
 <span class="sd">      ``BeamIOError`` if listing fails, but not if no files were found.</span>
 <span class="sd">    &quot;&quot;&quot;</span>
     <span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">exists</span><span class="p">(</span><span class="n">dir_or_prefix</span><span class="p">):</span>
       <span class="k">return</span>

     <span class="k">def</span> <span class="nf">list_files</span><span class="p">(</span><span class="n">root</span><span class="p">):</span>
       <span class="k">for</span> <span class="n">dirpath</span><span class="p">,</span> <span class="n">_</span><span class="p">,</span> <span class="n">files</span> <span class="ow">in</span> <span class="n">os</span><span class="o">.</span><span class="n">walk</span><span class="p">(</span><span class="n">root</span><span class="p">):</span>
         <span class="k">for</span> <span class="n">filename</span> <span class="ow">in</span> <span class="n">files</span><span class="p">:</span>
           <span class="k">yield</span> <span class="bp">self</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">dirpath</span><span class="p">,</span> <span class="n">filename</span><span class="p">)</span>

     <span class="k">try</span><span class="p">:</span>
       <span class="k">for</span> <span class="n">f</span> <span class="ow">in</span> <span class="n">list_files</span><span class="p">(</span><span class="n">dir_or_prefix</span><span class="p">):</span>
         <span class="k">try</span><span class="p">:</span>
           <span class="k">yield</span> <span class="n">FileMetadata</span><span class="p">(</span><span class="n">f</span><span class="p">,</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">getsize</span><span class="p">(</span><span class="n">f</span><span class="p">))</span>
         <span class="k">except</span> <span class="ne">OSError</span><span class="p">:</span>
           <span class="c1"># Files may disappear, such as when listing /tmp.</span>
           <span class="k">pass</span>
     <span class="k">except</span> <span class="ne">Exception</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span>  <span class="c1"># pylint: disable=broad-except</span>
       <span class="k">raise</span> <span class="n">BeamIOError</span><span class="p">(</span><span class="s2">&quot;List operation failed&quot;</span><span class="p">,</span> <span class="p">{</span><span class="n">dir_or_prefix</span><span class="p">:</span> <span class="n">e</span><span class="p">})</span>

   <span class="k">def</span> <span class="nf">_path_open</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">path</span><span class="p">,</span> <span class="n">mode</span><span class="p">,</span> <span class="n">mime_type</span><span class="o">=</span><span class="s1">&#39;application/octet-stream&#39;</span><span class="p">,</span>
                  <span class="n">compression_type</span><span class="o">=</span><span class="n">CompressionTypes</span><span class="o">.</span><span class="n">AUTO</span><span class="p">):</span>
     <span class="sd">&quot;&quot;&quot;Helper functions to open a file in the provided mode.</span>
 <span class="sd">    &quot;&quot;&quot;</span>
     <span class="n">compression_type</span> <span class="o">=</span> <span class="n">FileSystem</span><span class="o">.</span><span class="n">_get_compression_type</span><span class="p">(</span><span class="n">path</span><span class="p">,</span> <span class="n">compression_type</span><span class="p">)</span>
     <span class="n">raw_file</span> <span class="o">=</span> <span class="nb">open</span><span class="p">(</span><span class="n">path</span><span class="p">,</span> <span class="n">mode</span><span class="p">)</span>
     <span class="k">if</span> <span class="n">compression_type</span> <span class="o">==</span> <span class="n">CompressionTypes</span><span class="o">.</span><span class="n">UNCOMPRESSED</span><span class="p">:</span>
       <span class="k">return</span> <span class="n">raw_file</span>
     <span class="k">else</span><span class="p">:</span>
       <span class="k">return</span> <span class="n">CompressedFile</span><span class="p">(</span><span class="n">raw_file</span><span class="p">,</span> <span class="n">compression_type</span><span class="o">=</span><span class="n">compression_type</span><span class="p">)</span>

 <div class="viewcode-block" id="LocalFileSystem.create"><a class="viewcode-back" href="../../../apache_beam.io.localfilesystem.html#apache_beam.io.localfilesystem.LocalFileSystem.create">[docs]</a>  <span class="k">def</span> <span class="nf">create</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">path</span><span class="p">,</span> <span class="n">mime_type</span><span class="o">=</span><span class="s1">&#39;application/octet-stream&#39;</span><span class="p">,</span>
              <span class="n">compression_type</span><span class="o">=</span><span class="n">CompressionTypes</span><span class="o">.</span><span class="n">AUTO</span><span class="p">):</span>
     <span class="sd">&quot;&quot;&quot;Returns a write channel for the given file path.</span>

 <span class="sd">    Args:</span>
 <span class="sd">      path: string path of the file object to be written to the system</span>
 <span class="sd">      mime_type: MIME type to specify the type of content in the file object</span>
 <span class="sd">      compression_type: Type of compression to be used for this object</span>

 <span class="sd">    Returns: file handle with a close function for the user to use</span>
 <span class="sd">    &quot;&quot;&quot;</span>
     <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_path_open</span><span class="p">(</span><span class="n">path</span><span class="p">,</span> <span class="s1">&#39;wb&#39;</span><span class="p">,</span> <span class="n">mime_type</span><span class="p">,</span> <span class="n">compression_type</span><span class="p">)</span></div>

 <div class="viewcode-block" id="LocalFileSystem.open"><a class="viewcode-back" href="../../../apache_beam.io.localfilesystem.html#apache_beam.io.localfilesystem.LocalFileSystem.open">[docs]</a>  <span class="k">def</span> <span class="nf">open</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">path</span><span class="p">,</span> <span class="n">mime_type</span><span class="o">=</span><span class="s1">&#39;application/octet-stream&#39;</span><span class="p">,</span>
            <span class="n">compression_type</span><span class="o">=</span><span class="n">CompressionTypes</span><span class="o">.</span><span class="n">AUTO</span><span class="p">):</span>
     <span class="sd">&quot;&quot;&quot;Returns a read channel for the given file path.</span>

 <span class="sd">    Args:</span>
 <span class="sd">      path: string path of the file object to be written to the system</span>
 <span class="sd">      mime_type: MIME type to specify the type of content in the file object</span>
 <span class="sd">      compression_type: Type of compression to be used for this object</span>

 <span class="sd">    Returns: file handle with a close function for the user to use</span>
 <span class="sd">    &quot;&quot;&quot;</span>
     <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_path_open</span><span class="p">(</span><span class="n">path</span><span class="p">,</span> <span class="s1">&#39;rb&#39;</span><span class="p">,</span> <span class="n">mime_type</span><span class="p">,</span> <span class="n">compression_type</span><span class="p">)</span></div>

 <div class="viewcode-block" id="LocalFileSystem.copy"><a class="viewcode-back" href="../../../apache_beam.io.localfilesystem.html#apache_beam.io.localfilesystem.LocalFileSystem.copy">[docs]</a>  <span class="k">def</span> <span class="nf">copy</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">source_file_names</span><span class="p">,</span> <span class="n">destination_file_names</span><span class="p">):</span>
     <span class="sd">&quot;&quot;&quot;Recursively copy the file tree from the source to the destination</span>

 <span class="sd">    Args:</span>
 <span class="sd">      source_file_names: list of source file objects that needs to be copied</span>
 <span class="sd">      destination_file_names: list of destination of the new object</span>

 <span class="sd">    Raises:</span>
 <span class="sd">      ``BeamIOError`` if any of the copy operations fail</span>
 <span class="sd">    &quot;&quot;&quot;</span>
     <span class="n">err_msg</span> <span class="o">=</span> <span class="p">(</span><span class="s2">&quot;source_file_names and destination_file_names should &quot;</span>
                <span class="s2">&quot;be equal in length&quot;</span><span class="p">)</span>
     <span class="k">assert</span> <span class="nb">len</span><span class="p">(</span><span class="n">source_file_names</span><span class="p">)</span> <span class="o">==</span> <span class="nb">len</span><span class="p">(</span><span class="n">destination_file_names</span><span class="p">),</span> <span class="n">err_msg</span>

     <span class="k">def</span> <span class="nf">_copy_path</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">destination</span><span class="p">):</span>
       <span class="sd">&quot;&quot;&quot;Recursively copy the file tree from the source to the destination</span>
 <span class="sd">      &quot;&quot;&quot;</span>
       <span class="k">try</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="n">destination</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">isdir</span><span class="p">(</span><span class="n">destination</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="n">destination</span><span class="p">)</span>
           <span class="k">else</span><span class="p">:</span>
             <span class="n">os</span><span class="o">.</span><span class="n">remove</span><span class="p">(</span><span class="n">destination</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">isdir</span><span class="p">(</span><span class="n">source</span><span class="p">):</span>
           <span class="n">shutil</span><span class="o">.</span><span class="n">copytree</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">destination</span><span class="p">)</span>
         <span class="k">else</span><span class="p">:</span>
           <span class="n">shutil</span><span class="o">.</span><span class="n">copy2</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">destination</span><span class="p">)</span>
       <span class="k">except</span> <span class="ne">OSError</span> <span class="k">as</span> <span class="n">err</span><span class="p">:</span>
         <span class="k">raise</span> <span class="ne">IOError</span><span class="p">(</span><span class="n">err</span><span class="p">)</span>

     <span class="n">exceptions</span> <span class="o">=</span> <span class="p">{}</span>
     <span class="k">for</span> <span class="n">source</span><span class="p">,</span> <span class="n">destination</span> <span class="ow">in</span> <span class="nb">zip</span><span class="p">(</span><span class="n">source_file_names</span><span class="p">,</span> <span class="n">destination_file_names</span><span class="p">):</span>
       <span class="k">try</span><span class="p">:</span>
         <span class="n">_copy_path</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">destination</span><span class="p">)</span>
       <span class="k">except</span> <span class="ne">Exception</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span>  <span class="c1"># pylint: disable=broad-except</span>
         <span class="n">exceptions</span><span class="p">[(</span><span class="n">source</span><span class="p">,</span> <span class="n">destination</span><span class="p">)]</span> <span class="o">=</span> <span class="n">e</span>

     <span class="k">if</span> <span class="n">exceptions</span><span class="p">:</span>
       <span class="k">raise</span> <span class="n">BeamIOError</span><span class="p">(</span><span class="s2">&quot;Copy operation failed&quot;</span><span class="p">,</span> <span class="n">exceptions</span><span class="p">)</span></div>

 <div class="viewcode-block" id="LocalFileSystem.rename"><a class="viewcode-back" href="../../../apache_beam.io.localfilesystem.html#apache_beam.io.localfilesystem.LocalFileSystem.rename">[docs]</a>  <span class="k">def</span> <span class="nf">rename</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">source_file_names</span><span class="p">,</span> <span class="n">destination_file_names</span><span class="p">):</span>
     <span class="sd">&quot;&quot;&quot;Rename the files at the source list to the destination list.</span>
 <span class="sd">    Source and destination lists should be of the same size.</span>

 <span class="sd">    Args:</span>
 <span class="sd">      source_file_names: List of file paths that need to be moved</span>
 <span class="sd">      destination_file_names: List of destination_file_names for the files</span>

 <span class="sd">    Raises:</span>
 <span class="sd">      ``BeamIOError`` if any of the rename operations fail</span>
 <span class="sd">    &quot;&quot;&quot;</span>
     <span class="n">err_msg</span> <span class="o">=</span> <span class="p">(</span><span class="s2">&quot;source_file_names and destination_file_names should &quot;</span>
                <span class="s2">&quot;be equal in length&quot;</span><span class="p">)</span>
     <span class="k">assert</span> <span class="nb">len</span><span class="p">(</span><span class="n">source_file_names</span><span class="p">)</span> <span class="o">==</span> <span class="nb">len</span><span class="p">(</span><span class="n">destination_file_names</span><span class="p">),</span> <span class="n">err_msg</span>

     <span class="k">def</span> <span class="nf">_rename_file</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">destination</span><span class="p">):</span>
       <span class="sd">&quot;&quot;&quot;Rename a single file object&quot;&quot;&quot;</span>
       <span class="k">try</span><span class="p">:</span>
         <span class="n">os</span><span class="o">.</span><span class="n">rename</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">destination</span><span class="p">)</span>
       <span class="k">except</span> <span class="ne">OSError</span> <span class="k">as</span> <span class="n">err</span><span class="p">:</span>
         <span class="k">raise</span> <span class="ne">IOError</span><span class="p">(</span><span class="n">err</span><span class="p">)</span>

     <span class="n">exceptions</span> <span class="o">=</span> <span class="p">{}</span>
     <span class="k">for</span> <span class="n">source</span><span class="p">,</span> <span class="n">destination</span> <span class="ow">in</span> <span class="nb">zip</span><span class="p">(</span><span class="n">source_file_names</span><span class="p">,</span> <span class="n">destination_file_names</span><span class="p">):</span>
       <span class="k">try</span><span class="p">:</span>
         <span class="n">_rename_file</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">destination</span><span class="p">)</span>
       <span class="k">except</span> <span class="ne">Exception</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span>  <span class="c1"># pylint: disable=broad-except</span>
         <span class="n">exceptions</span><span class="p">[(</span><span class="n">source</span><span class="p">,</span> <span class="n">destination</span><span class="p">)]</span> <span class="o">=</span> <span class="n">e</span>

     <span class="k">if</span> <span class="n">exceptions</span><span class="p">:</span>
       <span class="k">raise</span> <span class="n">BeamIOError</span><span class="p">(</span><span class="s2">&quot;Rename operation failed&quot;</span><span class="p">,</span> <span class="n">exceptions</span><span class="p">)</span></div>

 <div class="viewcode-block" id="LocalFileSystem.exists"><a class="viewcode-back" href="../../../apache_beam.io.localfilesystem.html#apache_beam.io.localfilesystem.LocalFileSystem.exists">[docs]</a>  <span class="k">def</span> <span class="nf">exists</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">path</span><span class="p">):</span>
     <span class="sd">&quot;&quot;&quot;Check if the provided path exists on the FileSystem.</span>

 <span class="sd">    Args:</span>
 <span class="sd">      path: string path that needs to be checked.</span>

 <span class="sd">    Returns: boolean flag indicating if path exists</span>
 <span class="sd">    &quot;&quot;&quot;</span>
     <span class="k">return</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="n">path</span><span class="p">)</span></div>

 <div class="viewcode-block" id="LocalFileSystem.size"><a class="viewcode-back" href="../../../apache_beam.io.localfilesystem.html#apache_beam.io.localfilesystem.LocalFileSystem.size">[docs]</a>  <span class="k">def</span> <span class="nf">size</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">path</span><span class="p">):</span>
     <span class="sd">&quot;&quot;&quot;Get size of path on the FileSystem.</span>

 <span class="sd">    Args:</span>
 <span class="sd">      path: string path in question.</span>

 <span class="sd">    Returns: int size of path according to the FileSystem.</span>

 <span class="sd">    Raises:</span>
 <span class="sd">      ``BeamIOError`` if path doesn&#39;t exist.</span>
 <span class="sd">    &quot;&quot;&quot;</span>
     <span class="k">try</span><span class="p">:</span>
       <span class="k">return</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">getsize</span><span class="p">(</span><span class="n">path</span><span class="p">)</span>
     <span class="k">except</span> <span class="ne">Exception</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span>  <span class="c1"># pylint: disable=broad-except</span>
       <span class="k">raise</span> <span class="n">BeamIOError</span><span class="p">(</span><span class="s2">&quot;Size operation failed&quot;</span><span class="p">,</span> <span class="p">{</span><span class="n">path</span><span class="p">:</span> <span class="n">e</span><span class="p">})</span></div>

 <div class="viewcode-block" id="LocalFileSystem.last_updated"><a class="viewcode-back" href="../../../apache_beam.io.localfilesystem.html#apache_beam.io.localfilesystem.LocalFileSystem.last_updated">[docs]</a>  <span class="k">def</span> <span class="nf">last_updated</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">path</span><span class="p">):</span>
     <span class="sd">&quot;&quot;&quot;Get UNIX Epoch time in seconds on the FileSystem.</span>

 <span class="sd">    Args:</span>
 <span class="sd">      path: string path of file.</span>

 <span class="sd">    Returns: float UNIX Epoch time</span>

 <span class="sd">    Raises:</span>
 <span class="sd">      ``BeamIOError`` if path doesn&#39;t exist.</span>
 <span class="sd">    &quot;&quot;&quot;</span>
     <span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">exists</span><span class="p">(</span><span class="n">path</span><span class="p">):</span>
       <span class="k">raise</span> <span class="n">BeamIOError</span><span class="p">(</span><span class="s1">&#39;Path does not exist: </span><span class="si">%s</span><span class="s1">&#39;</span> <span class="o">%</span> <span class="n">path</span><span class="p">)</span>
     <span class="k">return</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">getmtime</span><span class="p">(</span><span class="n">path</span><span class="p">)</span></div>

 <div class="viewcode-block" id="LocalFileSystem.checksum"><a class="viewcode-back" href="../../../apache_beam.io.localfilesystem.html#apache_beam.io.localfilesystem.LocalFileSystem.checksum">[docs]</a>  <span class="k">def</span> <span class="nf">checksum</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">path</span><span class="p">):</span>
     <span class="sd">&quot;&quot;&quot;Fetch checksum metadata of a file on the</span>
 <span class="sd">    :class:`~apache_beam.io.filesystem.FileSystem`.</span>

 <span class="sd">    Args:</span>
 <span class="sd">      path: string path of a file.</span>

 <span class="sd">    Returns: string containing file size.</span>

 <span class="sd">    Raises:</span>
 <span class="sd">      ``BeamIOError`` if path isn&#39;t a file or doesn&#39;t exist.</span>
 <span class="sd">    &quot;&quot;&quot;</span>
     <span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">exists</span><span class="p">(</span><span class="n">path</span><span class="p">):</span>
       <span class="k">raise</span> <span class="n">BeamIOError</span><span class="p">(</span><span class="s1">&#39;Path does not exist: </span><span class="si">%s</span><span class="s1">&#39;</span> <span class="o">%</span> <span class="n">path</span><span class="p">)</span>
     <span class="k">return</span> <span class="nb">str</span><span class="p">(</span><span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">getsize</span><span class="p">(</span><span class="n">path</span><span class="p">))</span></div>

 <div class="viewcode-block" id="LocalFileSystem.delete"><a class="viewcode-back" href="../../../apache_beam.io.localfilesystem.html#apache_beam.io.localfilesystem.LocalFileSystem.delete">[docs]</a>  <span class="k">def</span> <span class="nf">delete</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">paths</span><span class="p">):</span>
     <span class="sd">&quot;&quot;&quot;Deletes files or directories at the provided paths.</span>
 <span class="sd">    Directories will be deleted recursively.</span>

 <span class="sd">    Args:</span>
 <span class="sd">      paths: list of paths that give the file objects to be deleted</span>

 <span class="sd">    Raises:</span>
 <span class="sd">      ``BeamIOError`` if any of the delete operations fail</span>
 <span class="sd">    &quot;&quot;&quot;</span>
     <span class="k">def</span> <span class="nf">_delete_path</span><span class="p">(</span><span class="n">path</span><span class="p">):</span>
       <span class="sd">&quot;&quot;&quot;Recursively delete the file or directory at the provided path.</span>
 <span class="sd">      &quot;&quot;&quot;</span>
       <span class="k">try</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">isdir</span><span class="p">(</span><span class="n">path</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="n">path</span><span class="p">)</span>
         <span class="k">else</span><span class="p">:</span>
           <span class="n">os</span><span class="o">.</span><span class="n">remove</span><span class="p">(</span><span class="n">path</span><span class="p">)</span>
       <span class="k">except</span> <span class="ne">OSError</span> <span class="k">as</span> <span class="n">err</span><span class="p">:</span>
         <span class="k">raise</span> <span class="ne">IOError</span><span class="p">(</span><span class="n">err</span><span class="p">)</span>

     <span class="n">exceptions</span> <span class="o">=</span> <span class="p">{}</span>

     <span class="k">def</span> <span class="nf">try_delete</span><span class="p">(</span><span class="n">path</span><span class="p">):</span>
       <span class="k">try</span><span class="p">:</span>
         <span class="n">_delete_path</span><span class="p">(</span><span class="n">path</span><span class="p">)</span>
       <span class="k">except</span> <span class="ne">Exception</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span>  <span class="c1"># pylint: disable=broad-except</span>
         <span class="n">exceptions</span><span class="p">[</span><span class="n">path</span><span class="p">]</span> <span class="o">=</span> <span class="n">e</span>

     <span class="k">for</span> <span class="n">match_result</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">match</span><span class="p">(</span><span class="n">paths</span><span class="p">):</span>
       <span class="n">metadata_list</span> <span class="o">=</span> <span class="n">match_result</span><span class="o">.</span><span class="n">metadata_list</span>

       <span class="k">if</span> <span class="ow">not</span> <span class="n">metadata_list</span><span class="p">:</span>
         <span class="n">exceptions</span><span class="p">[</span><span class="n">match_result</span><span class="o">.</span><span class="n">pattern</span><span class="p">]</span> <span class="o">=</span> \
           <span class="ne">IOError</span><span class="p">(</span><span class="s1">&#39;No files found to delete under: </span><span class="si">%s</span><span class="s1">&#39;</span> <span class="o">%</span> <span class="n">match_result</span><span class="o">.</span><span class="n">pattern</span><span class="p">)</span>

       <span class="k">for</span> <span class="n">metadata</span> <span class="ow">in</span> <span class="n">match_result</span><span class="o">.</span><span class="n">metadata_list</span><span class="p">:</span>
         <span class="n">try_delete</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">if</span> <span class="n">exceptions</span><span class="p">:</span>
       <span class="k">raise</span> <span class="n">BeamIOError</span><span class="p">(</span><span class="s2">&quot;Delete operation failed&quot;</span><span class="p">,</span> <span class="n">exceptions</span><span class="p">)</span></div></div>
 </pre></div>

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