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  <div class="section" id="module-celery.task">
<h1>Task Information and Utilities - celery.task<a class="headerlink" href="#module-celery.task" title="Permalink to this headline">¶</a></h1>
<p>Working with tasks and task sets.</p>
<dl class="function">
<dt id="celery.task.discard_all">
<tt class="descclassname">celery.task.</tt><tt class="descname">discard_all</tt><big>(</big><em>connect_timeout=4</em><big>)</big><a class="headerlink" href="#celery.task.discard_all" title="Permalink to this definition">¶</a></dt>
<dd><p>Discard all waiting tasks.</p>
<p>This will ignore all tasks waiting for execution, and they will
be deleted from the messaging server.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Returns:</th><td class="field-body">the number of tasks discarded.</td>
</tr>
<tr class="field"><th class="field-name">Return type:</th><td class="field-body">int</td>
</tr>
</tbody>
</table>
</dd></dl>

<dl class="function">
<dt id="celery.task.dmap">
<tt class="descclassname">celery.task.</tt><tt class="descname">dmap</tt><big>(</big><em>func</em>, <em>args</em>, <em>timeout=None</em><big>)</big><a class="headerlink" href="#celery.task.dmap" title="Permalink to this definition">¶</a></dt>
<dd><p>Distribute processing of the arguments and collect the results.</p>
<p>Example</p>
<div class="highlight-python"><div class="highlight"><pre><span class="gp">&gt;&gt;&gt; </span><span class="kn">from</span> <span class="nn">celery.task</span> <span class="kn">import</span> <span class="nb">map</span>
<span class="gp">&gt;&gt;&gt; </span><span class="kn">import</span> <span class="nn">operator</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">dmap</span><span class="p">(</span><span class="n">operator</span><span class="o">.</span><span class="n">add</span><span class="p">,</span> <span class="p">[[</span><span class="mf">2</span><span class="p">,</span> <span class="mf">2</span><span class="p">],</span> <span class="p">[</span><span class="mf">4</span><span class="p">,</span> <span class="mf">4</span><span class="p">],</span> <span class="p">[</span><span class="mf">8</span><span class="p">,</span> <span class="mf">8</span><span class="p">]])</span>
<span class="go">[4, 8, 16]</span>
</pre></div>
</div>
</dd></dl>

<dl class="function">
<dt id="celery.task.dmap_async">
<tt class="descclassname">celery.task.</tt><tt class="descname">dmap_async</tt><big>(</big><em>func</em>, <em>args</em>, <em>timeout=None</em><big>)</big><a class="headerlink" href="#celery.task.dmap_async" title="Permalink to this definition">¶</a></dt>
<dd><p>Distribute processing of the arguments and collect the results
asynchronously.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><a title="celery.result.AsyncResult" class="reference external" href="celery.result.html#celery.result.AsyncResult"><tt class="xref docutils literal"><span class="pre">celery.result.AsyncResult</span></tt></a> object.</td>
</tr>
</tbody>
</table>
<p>Example</p>
<div class="highlight-python"><div class="highlight"><pre><span class="gp">&gt;&gt;&gt; </span><span class="kn">from</span> <span class="nn">celery.task</span> <span class="kn">import</span> <span class="n">dmap_async</span>
<span class="gp">&gt;&gt;&gt; </span><span class="kn">import</span> <span class="nn">operator</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">presult</span> <span class="o">=</span> <span class="n">dmap_async</span><span class="p">(</span><span class="n">operator</span><span class="o">.</span><span class="n">add</span><span class="p">,</span> <span class="p">[[</span><span class="mf">2</span><span class="p">,</span> <span class="mf">2</span><span class="p">],</span> <span class="p">[</span><span class="mf">4</span><span class="p">,</span> <span class="mf">4</span><span class="p">],</span> <span class="p">[</span><span class="mf">8</span><span class="p">,</span> <span class="mf">8</span><span class="p">]])</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">presult</span>
<span class="go">&lt;AsyncResult: 373550e8-b9a0-4666-bc61-ace01fa4f91d&gt;</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">presult</span><span class="o">.</span><span class="n">status</span>
<span class="go">&#39;DONE&#39;</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">presult</span><span class="o">.</span><span class="n">result</span>
<span class="go">[4, 8, 16]</span>
</pre></div>
</div>
</dd></dl>

<dl class="function">
<dt id="celery.task.execute_remote">
<tt class="descclassname">celery.task.</tt><tt class="descname">execute_remote</tt><big>(</big><em>func</em>, <em>*args</em>, <em>**kwargs</em><big>)</big><a class="headerlink" href="#celery.task.execute_remote" title="Permalink to this definition">¶</a></dt>
<dd><p>Execute arbitrary function/object remotely.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first last simple">
<li><em>func</em> &#8211; A callable function or object.</li>
<li><em>*args</em> &#8211; Positional arguments to apply to the function.</li>
<li><em>**kwargs</em> &#8211; Keyword arguments to apply to the function.</li>
</ul>
</td>
</tr>
</tbody>
</table>
<p>The object must be picklable, so you can&#8217;t use lambdas or functions
defined in the REPL (the objects must have an associated module).</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Returns:</th><td class="field-body">class:<cite>celery.result.AsyncResult</cite>.</td>
</tr>
</tbody>
</table>
</dd></dl>

<dl class="function">
<dt id="celery.task.is_done">
<tt class="descclassname">celery.task.</tt><tt class="descname">is_done</tt><big>(</big><em>task_id</em><big>)</big><a class="headerlink" href="#celery.task.is_done" title="Permalink to this definition">¶</a></dt>
<dd><p>Returns <tt class="xref docutils literal"><span class="pre">True</span></tt> if task with <tt class="docutils literal"><span class="pre">task_id</span></tt> has been executed.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Return type:</th><td class="field-body">bool</td>
</tr>
</tbody>
</table>
</dd></dl>

<dl class="function">
<dt id="celery.task.ping">
<tt class="descclassname">celery.task.</tt><tt class="descname">ping</tt><big>(</big><big>)</big><a class="headerlink" href="#celery.task.ping" title="Permalink to this definition">¶</a></dt>
<dd><p>Test if the server is alive.</p>
<p>Example:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="gp">&gt;&gt;&gt; </span><span class="kn">from</span> <span class="nn">celery.task</span> <span class="kn">import</span> <span class="n">ping</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">ping</span><span class="p">()</span>
<span class="go">&#39;pong&#39;</span>
</pre></div>
</div>
</dd></dl>

</div>


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