chainer.training.get_trigger¶
-
chainer.training.
get_trigger
(trigger)[source]¶ Gets a trigger object.
Trigger object is a callable that accepts a
Trainer
object as an argument and returns a boolean value. When it returns True, various kinds of events can occur depending on the context in which the trigger is used. For example, if the trigger is passed to theTrainer
as the stop trigger, the training loop breaks when the trigger returns True. If the trigger is passed to theextend()
method of a trainer, then the registered extension is invoked only when the trigger returns True.This function returns a trigger object based on the argument. If
trigger
is already a callable, it just returns the trigger. Iftrigger
isNone
, it returns a trigger that never fires. Otherwise, it passes the value toIntervalTrigger
.Parameters: trigger – Trigger object. It can be either an already built trigger object (i.e., a callable object that accepts a trainer object and returns a bool value), or a tuple. In latter case, the tuple is passed to IntervalTrigger
.Returns: trigger
if it is a callable, otherwise aIntervalTrigger
object made fromtrigger
.