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<H1><A NAME="SECTION0081000000000000000000">
6.10 <tt class="module">sched</tt> --
Event scheduler</A>
</H1>
<P>
<P>
The <tt class="module">sched</tt> module defines a class which implements a general
purpose event scheduler:
<P>
<dl><dt><b><a name='l2h-1158'><tt class='class'>scheduler</tt></a></b> (<var>timefunc, delayfunc</var>)
<dd>
The <tt class="class">scheduler</tt> class defines a generic interface to scheduling
events. It needs two functions to actually deal with the ``outside world''
-- <var>timefunc</var> should be callable without arguments, and return
a number (the ``time'', in any units whatsoever). The <var>delayfunc</var>
function should be callable with one argument, compatible with the output
of <var>timefunc</var>, and should delay that many time units.
<var>delayfunc</var> will also be called with the argument <code>0</code> after
each event is run to allow other threads an opportunity to run in
multi-threaded applications.
</dl>
<P>
Example:
<P>
<dl><dd><pre class="verbatim">
>>> import sched, time
>>> s=sched.scheduler(time.time, time.sleep)
>>> def print_time(): print "From print_time", time.time()
...
>>> def print_some_times():
... print time.time()
... s.enter(5, 1, print_time, ())
... s.enter(10, 1, print_time, ())
... s.run()
... print time.time()
...
>>> print_some_times()
930343690.257
From print_time 930343695.274
From print_time 930343700.273
930343700.276
</pre></dl>
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