twisted.internet.taskView Source (View In Hierarchy)
Call a function repeatedly.
f returns a deferred, rescheduling will not take place until the deferred has fired. The result value is ignored.
|Instance Variable||f||The function to call.|
|Instance Variable||a||A tuple of arguments to pass the function.|
|Instance Variable||kw||A dictionary of keyword arguments to pass to the function.|
|Instance Variable||clock||A provider of
|Instance Variable||running||A flag which is
|Class Method||withCount||An alternate constructor for
|Method||start||Start running function every interval seconds.|
|Method||stop||Stop running function.|
|Method||reset||Skip the next iteration and reset the timer.|
|Instance Variable||_realLastTime||When counting skips, the time at which the skip counter was last invoked.|
|Instance Variable||_runAtStart||A flag indicating whether the 'now' argument was passed to
|Method||_intervalOf||Determine the number of intervals passed as of the given point in time.|
|Method||_scheduleFrom||Schedule the next iteration of this looping call.|
fis scheduled to be called (or is currently being called). It is set to
startis called and set to
stopis called or if
fraises an exception. In either case, it will be
Falseby the time the
startfires its callback or errback.
An alternate constructor for
LoopingCall that makes available the number of calls which should have occurred since it was last invoked.
Note that this number is an
int value; It represents the discrete number of calls that should have been made. For example, if you are using a looping call to display an animation with discrete frames, this number would be the number of frames to advance.
The count is normally 1, but can be higher. For example, if the reactor is blocked and takes too long to invoke the
LoopingCall, a Deferred returned from a previous call is not fired before an interval has elapsed, or if the callable itself blocks for longer than an interval, preventing itself from being called.
When running with an interval if 0, count will be always 1.
|Parameters||countCallable||A callable that will be invoked each time the resulting LoopingCall is run, with an integer specifying the number of calls that should have been invoked. (type: 1-argument callable which takes an |
|Returns||An instance of |
Determine the number of intervals passed as of the given point in time.
|Parameters||t||The specified time (from the start of the |
Start running function every interval seconds.
|Parameters||interval||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.|
|now||If True, run this call right now. Otherwise, wait until the interval has elapsed before beginning.|
|Returns||A Deferred whose callback will be invoked with |
Stop running function.
Skip the next iteration and reset the timer.
Schedule the next iteration of this looping call.
|Parameters||when||The present time from whence the call is scheduled.|