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  <div class="section" id="module-celery.backends.base">
<h1>Backend: Base - celery.backends.base<a class="headerlink" href="#module-celery.backends.base" title="Permalink to this headline">¶</a></h1>
<p>celery.backends.base</p>
<dl class="class">
<dt id="celery.backends.base.BaseBackend">
<em class="property">
class </em><tt class="descclassname">celery.backends.base.</tt><tt class="descname">BaseBackend</tt><a class="headerlink" href="#celery.backends.base.BaseBackend" title="Permalink to this definition">¶</a></dt>
<dd><p>The base backend class. All backends should inherit from this.</p>
<dl class="exception">
<dt id="celery.backends.base.BaseBackend.TimeoutError">
<em class="property">
exception </em><tt class="descname">TimeoutError</tt><a class="headerlink" href="#celery.backends.base.BaseBackend.TimeoutError" title="Permalink to this definition">¶</a></dt>
<dd>The operation timed out.</dd></dl>

<dl class="method">
<dt id="celery.backends.base.BaseBackend.cleanup">
<tt class="descclassname">BaseBackend.</tt><tt class="descname">cleanup</tt><big>(</big><big>)</big><a class="headerlink" href="#celery.backends.base.BaseBackend.cleanup" title="Permalink to this definition">¶</a></dt>
<dd>Backend cleanup. Is run by
<tt class="xref docutils literal"><span class="pre">celery.task.DeleteExpiredTaskMetaTask</span></tt>.</dd></dl>

<dl class="method">
<dt id="celery.backends.base.BaseBackend.exception_to_python">
<tt class="descclassname">BaseBackend.</tt><tt class="descname">exception_to_python</tt><big>(</big><em>exc</em><big>)</big><a class="headerlink" href="#celery.backends.base.BaseBackend.exception_to_python" title="Permalink to this definition">¶</a></dt>
<dd>Convert serialized exception to Python exception.</dd></dl>

<dl class="method">
<dt id="celery.backends.base.BaseBackend.get_result">
<tt class="descclassname">BaseBackend.</tt><tt class="descname">get_result</tt><big>(</big><em>task_id</em><big>)</big><a class="headerlink" href="#celery.backends.base.BaseBackend.get_result" title="Permalink to this definition">¶</a></dt>
<dd>Get the result of a task.</dd></dl>

<dl class="method">
<dt id="celery.backends.base.BaseBackend.get_status">
<tt class="descclassname">BaseBackend.</tt><tt class="descname">get_status</tt><big>(</big><em>task_id</em><big>)</big><a class="headerlink" href="#celery.backends.base.BaseBackend.get_status" title="Permalink to this definition">¶</a></dt>
<dd>Get the status of a task.</dd></dl>

<dl class="method">
<dt id="celery.backends.base.BaseBackend.get_traceback">
<tt class="descclassname">BaseBackend.</tt><tt class="descname">get_traceback</tt><big>(</big><em>task_id</em><big>)</big><a class="headerlink" href="#celery.backends.base.BaseBackend.get_traceback" title="Permalink to this definition">¶</a></dt>
<dd>Get the traceback for a failed task.</dd></dl>

<dl class="method">
<dt id="celery.backends.base.BaseBackend.is_done">
<tt class="descclassname">BaseBackend.</tt><tt class="descname">is_done</tt><big>(</big><em>task_id</em><big>)</big><a class="headerlink" href="#celery.backends.base.BaseBackend.is_done" title="Permalink to this definition">¶</a></dt>
<dd>Returns <tt class="xref docutils literal"><span class="pre">True</span></tt> if the task was successfully executed.</dd></dl>

<dl class="method">
<dt id="celery.backends.base.BaseBackend.mark_as_done">
<tt class="descclassname">BaseBackend.</tt><tt class="descname">mark_as_done</tt><big>(</big><em>task_id</em>, <em>result</em><big>)</big><a class="headerlink" href="#celery.backends.base.BaseBackend.mark_as_done" title="Permalink to this definition">¶</a></dt>
<dd>Mark task as successfully executed.</dd></dl>

<dl class="method">
<dt id="celery.backends.base.BaseBackend.mark_as_failure">
<tt class="descclassname">BaseBackend.</tt><tt class="descname">mark_as_failure</tt><big>(</big><em>task_id</em>, <em>exc</em>, <em>traceback=None</em><big>)</big><a class="headerlink" href="#celery.backends.base.BaseBackend.mark_as_failure" title="Permalink to this definition">¶</a></dt>
<dd>Mark task as executed with failure. Stores the execption.</dd></dl>

<dl class="method">
<dt id="celery.backends.base.BaseBackend.mark_as_retry">
<tt class="descclassname">BaseBackend.</tt><tt class="descname">mark_as_retry</tt><big>(</big><em>task_id</em>, <em>exc</em>, <em>traceback=None</em><big>)</big><a class="headerlink" href="#celery.backends.base.BaseBackend.mark_as_retry" title="Permalink to this definition">¶</a></dt>
<dd>Mark task as being retries. Stores the current
exception (if any).</dd></dl>

<dl class="method">
<dt id="celery.backends.base.BaseBackend.prepare_exception">
<tt class="descclassname">BaseBackend.</tt><tt class="descname">prepare_exception</tt><big>(</big><em>exc</em><big>)</big><a class="headerlink" href="#celery.backends.base.BaseBackend.prepare_exception" title="Permalink to this definition">¶</a></dt>
<dd>Prepare exception for serialization.</dd></dl>

<dl class="method">
<dt id="celery.backends.base.BaseBackend.prepare_result">
<tt class="descclassname">BaseBackend.</tt><tt class="descname">prepare_result</tt><big>(</big><em>result</em><big>)</big><a class="headerlink" href="#celery.backends.base.BaseBackend.prepare_result" title="Permalink to this definition">¶</a></dt>
<dd>Prepare result for storage.</dd></dl>

<dl class="method">
<dt id="celery.backends.base.BaseBackend.process_cleanup">
<tt class="descclassname">BaseBackend.</tt><tt class="descname">process_cleanup</tt><big>(</big><big>)</big><a class="headerlink" href="#celery.backends.base.BaseBackend.process_cleanup" title="Permalink to this definition">¶</a></dt>
<dd><p>Cleanup actions to do at the end of a task worker process.</p>
<p>See <tt class="xref docutils literal"><span class="pre">celery.worker.jail()</span></tt>.</p>
</dd></dl>

<dl class="method">
<dt id="celery.backends.base.BaseBackend.store_result">
<tt class="descclassname">BaseBackend.</tt><tt class="descname">store_result</tt><big>(</big><em>task_id</em>, <em>result</em>, <em>status</em><big>)</big><a class="headerlink" href="#celery.backends.base.BaseBackend.store_result" title="Permalink to this definition">¶</a></dt>
<dd>Store the result and status of a task.</dd></dl>

<dl class="method">
<dt id="celery.backends.base.BaseBackend.wait_for">
<tt class="descclassname">BaseBackend.</tt><tt class="descname">wait_for</tt><big>(</big><em>task_id</em>, <em>timeout=None</em><big>)</big><a class="headerlink" href="#celery.backends.base.BaseBackend.wait_for" title="Permalink to this definition">¶</a></dt>
<dd><p>Wait for task and return its result.</p>
<p>If the task raises an exception, this exception
will be re-raised by <a title="celery.backends.base.BaseBackend.wait_for" class="reference internal" href="#celery.backends.base.BaseBackend.wait_for"><tt class="xref docutils literal"><span class="pre">wait_for()</span></tt></a>.</p>
<p>If <tt class="docutils literal"><span class="pre">timeout</span></tt> is not <tt class="xref docutils literal"><span class="pre">None</span></tt>, this raises the
<a title="celery.exceptions.TimeoutError" class="reference external" href="celery.exceptions.html#celery.exceptions.TimeoutError"><tt class="xref docutils literal"><span class="pre">celery.exceptions.TimeoutError</span></tt></a> exception if the operation
takes longer than <tt class="docutils literal"><span class="pre">timeout</span></tt> seconds.</p>
</dd></dl>

</dd></dl>

</div>


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