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twisted ::
internet ::
task ::
LoopingCall ::
Class LoopingCall
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<!-- ==================== CLASS DESCRIPTION ==================== -->
<h1 class="epydoc">Class LoopingCall</h1><p class="nomargin-top"></p>
<pre class="base-tree">
object --+
|
<strong class="uidshort">LoopingCall</strong>
</pre>
<hr />
<p>Call a function repeatedly.</p>
<p>If <code>f</code> returns a deferred, rescheduling will not take place
until the deferred has fired. The result value is ignored.</p>
<!-- ==================== INSTANCE METHODS ==================== -->
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<span class="summary-type"> </span>
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<td><span class="summary-sig"><a name="__call__"></a><span class="summary-sig-name">__call__</span>(<span class="summary-sig-arg">self</span>)</span></td>
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<span class="summary-type"> </span>
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<td><span class="summary-sig"><a href="twisted.internet.task.LoopingCall-class.html#__init__" class="summary-sig-name">__init__</a>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">f</span>,
<span class="summary-sig-arg">*a</span>,
<span class="summary-sig-arg">**kw</span>)</span><br />
x.__init__(...) initializes x; see x.__class__.__doc__ for signature</td>
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<span class="summary-type"> </span>
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<td><span class="summary-sig"><a href="twisted.internet.task.LoopingCall-class.html#__repr__" class="summary-sig-name">__repr__</a>(<span class="summary-sig-arg">self</span>)</span><br />
repr(x)</td>
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<span class="summary-type"> </span>
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<td><span class="summary-sig"><a name="_reschedule"></a><span class="summary-sig-name">_reschedule</span>(<span class="summary-sig-arg">self</span>)</span><br />
Schedule the next iteration of this looping call.</td>
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<span class="summary-type"> </span>
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<td><span class="summary-sig"><a href="twisted.internet.task.LoopingCall-class.html#start" class="summary-sig-name">start</a>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">interval</span>,
<span class="summary-sig-arg">now</span>=<span class="summary-sig-default">True</span>)</span><br />
Start running function every interval seconds.</td>
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<span class="summary-type"> </span>
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<td><span class="summary-sig"><a name="stop"></a><span class="summary-sig-name">stop</span>(<span class="summary-sig-arg">self</span>)</span><br />
Stop running function.</td>
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<p class="indent-wrapped-lines"><b>Inherited from <code>object</code></b>:
<code>__delattr__</code>,
<code>__format__</code>,
<code>__getattribute__</code>,
<code>__hash__</code>,
<code>__new__</code>,
<code>__reduce__</code>,
<code>__reduce_ex__</code>,
<code>__setattr__</code>,
<code>__sizeof__</code>,
<code>__str__</code>,
<code>__subclasshook__</code>
</p>
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<span class="summary-type"> </span>
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<a name="call"></a><span class="summary-name">call</span> = <code title="None">None</code><br />
hash(x)
</td>
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<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<a name="deferred"></a><span class="summary-name">deferred</span> = <code title="None">None</code><br />
hash(x)
</td>
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<span class="summary-type"> </span>
</td><td class="summary">
<a name="interval"></a><span class="summary-name">interval</span> = <code title="None">None</code><br />
hash(x)
</td>
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<span class="summary-type"> </span>
</td><td class="summary">
<a name="running"></a><span class="summary-name">running</span> = <code title="False">False</code>
</td>
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<span class="summary-type"> </span>
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<a name="starttime"></a><span class="summary-name">starttime</span> = <code title="None">None</code><br />
hash(x)
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<!-- ==================== INSTANCE VARIABLES ==================== -->
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<span class="summary-type"><code>float</code></span>
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<a name="_lastTime"></a><span class="summary-name">_lastTime</span> = <code title="0.0">0.0</code><br />
The time at which this instance most recently scheduled itself to
run.
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<span class="summary-type"> </span>
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<a name="a"></a><span class="summary-name">a</span><br />
A tuple of arguments to pass the function.
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<span class="summary-type"> </span>
</td><td class="summary">
<a href="twisted.internet.task.LoopingCall-class.html#clock" class="summary-name">clock</a><br />
A provider of <code
class="link">twisted.internet.interfaces.IReactorTime</code>.
</td>
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<span class="summary-type"> </span>
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<a name="f"></a><span class="summary-name">f</span><br />
The function to call.
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<span class="summary-type"> </span>
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<a name="kw"></a><span class="summary-name">kw</span><br />
A dictionary of keyword arguments to pass to the function.
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<!-- ==================== PROPERTIES ==================== -->
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<p class="indent-wrapped-lines"><b>Inherited from <code>object</code></b>:
<code>__class__</code>
</p>
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<h3 class="epydoc"><span class="sig"><span class="sig-name">__init__</span>(<span class="sig-arg">self</span>,
<span class="sig-arg">f</span>,
<span class="sig-arg">*a</span>,
<span class="sig-arg">**kw</span>)</span>
<br /><em class="fname">(Constructor)</em>
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<p>x.__init__(...) initializes x; see x.__class__.__doc__ for
signature</p>
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<dt>Overrides:
object.__init__
<dd><em class="note">(inherited documentation)</em></dd>
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<h3 class="epydoc"><span class="sig"><span class="sig-name">__repr__</span>(<span class="sig-arg">self</span>)</span>
<br /><em class="fname">(Representation operator)</em>
</h3>
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<p>repr(x)</p>
<dl class="fields">
<dt>Overrides:
object.__repr__
<dd><em class="note">(inherited documentation)</em></dd>
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<h3 class="epydoc"><span class="sig"><span class="sig-name">start</span>(<span class="sig-arg">self</span>,
<span class="sig-arg">interval</span>,
<span class="sig-arg">now</span>=<span class="sig-default">True</span>)</span>
</h3>
</td><td align="right" valign="top"
>
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<p>Start running function every interval seconds.</p>
<dl class="fields">
<dt>Parameters:</dt>
<dd><ul class="nomargin-top">
<li><strong class="pname"><code>interval</code></strong> - The number of seconds between calls. May be less than one.
Precision will depend on the underlying platform, the available
hardware, and the load on the system.</li>
<li><strong class="pname"><code>now</code></strong> - If True, run this call right now. Otherwise, wait until the
interval has elapsed before beginning.</li>
</ul></dd>
<dt>Returns:</dt>
<dd>A Deferred whose callback will be invoked with <code>self</code>
when <code>self.stop</code> is called, or whose errback will be
invoked when the function raises an exception or returned a
deferred that has its errback invoked.</dd>
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<h3 class="epydoc">clock</h3>
A provider of <code
class="link">twisted.internet.interfaces.IReactorTime</code>. The
default is <code class="link">twisted.internet.reactor</code>. Feel free
to set this to something else, but it probably ought to be set *before*
calling <code class="link">start</code>.
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