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<h1><a href="../../index.html">Django v1.2 documentation</a></h1>
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<div class="section" id="s-the-file-object">
<span id="the-file-object"></span><h1>The <tt class="docutils literal"><span class="pre">File</span></tt> object<a class="headerlink" href="#the-file-object" title="Permalink to this headline">¶</a></h1>
<dl class="class">
<dt id="django.core.files.File">
<em class="property">class </em><tt class="descname">File</tt>(<em>file_object</em>)<a class="headerlink" href="#django.core.files.File" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
<div class="section" id="s-file-attributes-and-methods">
<span id="file-attributes-and-methods"></span><h2><tt class="docutils literal"><span class="pre">File</span></tt> attributes and methods<a class="headerlink" href="#file-attributes-and-methods" title="Permalink to this headline">¶</a></h2>
<p>Django’s <tt class="docutils literal"><span class="pre">File</span></tt> has the following attributes and methods:</p>
<dl class="attribute">
<dt id="django.core.files.File.name">
<tt class="descclassname">File.</tt><tt class="descname">name</tt><a class="headerlink" href="#django.core.files.File.name" title="Permalink to this definition">¶</a></dt>
<dd><p>The name of file including the relative path from <a class="reference internal" href="../settings.html#std:setting-MEDIA_ROOT"><tt class="xref std std-setting docutils literal"><span class="pre">MEDIA_ROOT</span></tt></a>.</p>
</dd></dl>
<dl class="attribute">
<dt id="django.core.files.File.path">
<tt class="descclassname">File.</tt><tt class="descname">path</tt><a class="headerlink" href="#django.core.files.File.path" title="Permalink to this definition">¶</a></dt>
<dd><p>The absolute path to the file’s location on a local filesystem.</p>
<p><a class="reference internal" href="../../howto/custom-file-storage.html"><em>Custom file storage systems</em></a> may not store
files locally; files stored on these systems will have a <tt class="docutils literal"><span class="pre">path</span></tt> of
<tt class="xref docutils literal"><span class="pre">None</span></tt>.</p>
</dd></dl>
<dl class="attribute">
<dt id="django.core.files.File.url">
<tt class="descclassname">File.</tt><tt class="descname">url</tt><a class="headerlink" href="#django.core.files.File.url" title="Permalink to this definition">¶</a></dt>
<dd><p>The URL where the file can be retrieved. This is often useful in
<a class="reference internal" href="../../topics/templates.html"><em>templates</em></a>; for example, a bit of a template for
displaying a <tt class="docutils literal"><span class="pre">Car</span></tt> (see above) might look like:</p>
<div class="highlight-html+django"><div class="highlight"><pre><span class="nt"><img</span> <span class="na">src=</span><span class="s">'</span><span class="cp">{{</span> <span class="nv">car.photo.url</span> <span class="cp">}}</span><span class="s">'</span> <span class="na">alt=</span><span class="s">'</span><span class="cp">{{</span> <span class="nv">car.name</span> <span class="cp">}}</span><span class="s">'</span> <span class="nt">/></span>
</pre></div>
</div>
</dd></dl>
<dl class="attribute">
<dt id="django.core.files.File.size">
<tt class="descclassname">File.</tt><tt class="descname">size</tt><a class="headerlink" href="#django.core.files.File.size" title="Permalink to this definition">¶</a></dt>
<dd><p>The size of the file in bytes.</p>
</dd></dl>
<dl class="method">
<dt id="django.core.files.File.open">
<tt class="descclassname">File.</tt><tt class="descname">open</tt>(<em>mode=None</em>)<a class="headerlink" href="#django.core.files.File.open" title="Permalink to this definition">¶</a></dt>
<dd><p>Open or reopen the file (which by definition also does <tt class="docutils literal"><span class="pre">File.seek(0)</span></tt>).
The <tt class="docutils literal"><span class="pre">mode</span></tt> argument allows the same values as Python's standard
<tt class="docutils literal"><span class="pre">open()</span></tt>.</p>
<p>When reopening a file, <tt class="docutils literal"><span class="pre">mode</span></tt> will override whatever mode the file was
originally opened with; <tt class="xref docutils literal"><span class="pre">None</span></tt> means to reopen with the original mode.</p>
</dd></dl>
<dl class="method">
<dt id="django.core.files.File.read">
<tt class="descclassname">File.</tt><tt class="descname">read</tt>(<em>num_bytes=None</em>)<a class="headerlink" href="#django.core.files.File.read" title="Permalink to this definition">¶</a></dt>
<dd><p>Read content from the file. The optional <tt class="docutils literal"><span class="pre">size</span></tt> is the number of bytes to
read; if not specified, the file will be read to the end.</p>
</dd></dl>
<dl class="method">
<dt id="django.core.files.File.__iter__">
<tt class="descclassname">File.</tt><tt class="descname">__iter__</tt>()<a class="headerlink" href="#django.core.files.File.__iter__" title="Permalink to this definition">¶</a></dt>
<dd><p>Iterate over the file yielding one line at a time.</p>
</dd></dl>
<dl class="method">
<dt id="django.core.files.File.chunks">
<tt class="descclassname">File.</tt><tt class="descname">chunks</tt>(<em>chunk_size=None</em>)<a class="headerlink" href="#django.core.files.File.chunks" title="Permalink to this definition">¶</a></dt>
<dd><p>Iterate over the file yielding "chunks" of a given size. <tt class="docutils literal"><span class="pre">chunk_size</span></tt>
defaults to 64 KB.</p>
<p>This is especially useful with very large files since it allows them to be
streamed off disk and avoids storing the whole file in memory.</p>
</dd></dl>
<dl class="method">
<dt id="django.core.files.File.multiple_chunks">
<tt class="descclassname">File.</tt><tt class="descname">multiple_chunks</tt>(<em>chunk_size=None</em>)<a class="headerlink" href="#django.core.files.File.multiple_chunks" title="Permalink to this definition">¶</a></dt>
<dd><p>Returns <tt class="xref docutils literal"><span class="pre">True</span></tt> if the file is large enough to require multiple chunks to
access all of its content give some <tt class="docutils literal"><span class="pre">chunk_size</span></tt>.</p>
</dd></dl>
<dl class="method">
<dt id="django.core.files.File.write">
<tt class="descclassname">File.</tt><tt class="descname">write</tt>(<em>content</em>)<a class="headerlink" href="#django.core.files.File.write" title="Permalink to this definition">¶</a></dt>
<dd><p>Writes the specified content string to the file. Depending on the storage
system behind the scenes, this content might not be fully committed until
<tt class="docutils literal"><span class="pre">close()</span></tt> is called on the file.</p>
</dd></dl>
<dl class="method">
<dt id="django.core.files.File.close">
<tt class="descclassname">File.</tt><tt class="descname">close</tt>()<a class="headerlink" href="#django.core.files.File.close" title="Permalink to this definition">¶</a></dt>
<dd><p>Close the file.</p>
</dd></dl>
</div>
<div class="section" id="s-additional-imagefield-attributes">
<span id="additional-imagefield-attributes"></span><h2>Additional <tt class="docutils literal"><span class="pre">ImageField</span></tt> attributes<a class="headerlink" href="#additional-imagefield-attributes" title="Permalink to this headline">¶</a></h2>
<dl class="attribute">
<dt id="django.core.files.File.width">
<tt class="descclassname">File.</tt><tt class="descname">width</tt><a class="headerlink" href="#django.core.files.File.width" title="Permalink to this definition">¶</a></dt>
<dd><p>Width of the image.</p>
</dd></dl>
<dl class="attribute">
<dt id="django.core.files.File.height">
<tt class="descclassname">File.</tt><tt class="descname">height</tt><a class="headerlink" href="#django.core.files.File.height" title="Permalink to this definition">¶</a></dt>
<dd><p>Height of the image.</p>
</dd></dl>
</div>
<div class="section" id="s-additional-methods-on-files-attached-to-objects">
<span id="additional-methods-on-files-attached-to-objects"></span><h2>Additional methods on files attached to objects<a class="headerlink" href="#additional-methods-on-files-attached-to-objects" title="Permalink to this headline">¶</a></h2>
<p>Any <a class="reference internal" href="#django.core.files.File" title="django.core.files.File"><tt class="xref py py-class docutils literal"><span class="pre">File</span></tt></a> that's associated with an object (as with <tt class="docutils literal"><span class="pre">Car.photo</span></tt>,
above) will also have a couple of extra methods:</p>
<dl class="method">
<dt id="django.core.files.File.save">
<tt class="descclassname">File.</tt><tt class="descname">save</tt>(<em>name</em>, <em>content</em>, <em>save=True</em>)<a class="headerlink" href="#django.core.files.File.save" title="Permalink to this definition">¶</a></dt>
<dd><p>Saves a new file with the file name and contents provided. This will not
replace the existing file, but will create a new file and update the object
to point to it. If <tt class="docutils literal"><span class="pre">save</span></tt> is <tt class="xref docutils literal"><span class="pre">True</span></tt>, the model's <tt class="docutils literal"><span class="pre">save()</span></tt> method will
be called once the file is saved. That is, these two lines:</p>
<div class="highlight-pycon"><div class="highlight"><pre><span class="gp">>>> </span><span class="n">car</span><span class="o">.</span><span class="n">photo</span><span class="o">.</span><span class="n">save</span><span class="p">(</span><span class="s">'myphoto.jpg'</span><span class="p">,</span> <span class="n">contents</span><span class="p">,</span> <span class="n">save</span><span class="o">=</span><span class="bp">False</span><span class="p">)</span>
<span class="gp">>>> </span><span class="n">car</span><span class="o">.</span><span class="n">save</span><span class="p">()</span>
</pre></div>
</div>
<p>are the same as this one line:</p>
<div class="highlight-pycon"><div class="highlight"><pre><span class="gp">>>> </span><span class="n">car</span><span class="o">.</span><span class="n">photo</span><span class="o">.</span><span class="n">save</span><span class="p">(</span><span class="s">'myphoto.jpg'</span><span class="p">,</span> <span class="n">contents</span><span class="p">,</span> <span class="n">save</span><span class="o">=</span><span class="bp">True</span><span class="p">)</span>
</pre></div>
</div>
<p>Note that the <tt class="docutils literal"><span class="pre">content</span></tt> argument must be an instance of
<a class="reference internal" href="#django.core.files.File" title="django.core.files.File"><tt class="xref py py-class docutils literal"><span class="pre">File</span></tt></a> or of a subclass of <a class="reference internal" href="#django.core.files.File" title="django.core.files.File"><tt class="xref py py-class docutils literal"><span class="pre">File</span></tt></a>.</p>
</dd></dl>
<dl class="method">
<dt id="django.core.files.File.delete">
<tt class="descclassname">File.</tt><tt class="descname">delete</tt>(<em>save=True</em>)<a class="headerlink" href="#django.core.files.File.delete" title="Permalink to this definition">¶</a></dt>
<dd><p>Remove the file from the model instance and delete the underlying file. The
<tt class="docutils literal"><span class="pre">save</span></tt> argument works as above.</p>
</dd></dl>
</div>
</div>
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<h3><a href="../../contents.html">Table Of Contents</a></h3>
<ul>
<li><a class="reference internal" href="#">The <tt class="docutils literal"><span class="pre">File</span></tt> object</a><ul>
<li><a class="reference internal" href="#file-attributes-and-methods"><tt class="docutils literal"><span class="pre">File</span></tt> attributes and methods</a></li>
<li><a class="reference internal" href="#additional-imagefield-attributes">Additional <tt class="docutils literal"><span class="pre">ImageField</span></tt> attributes</a></li>
<li><a class="reference internal" href="#additional-methods-on-files-attached-to-objects">Additional methods on files attached to objects</a></li>
</ul>
</li>
</ul>
<h3>Browse</h3>
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