Thread-like "task" that pauses and resumes in response to events

Usage:

        def aGenerator(someArg):
            yield untilSomeCondition; events.resume()
            # ... do something ...

        events.Task(aGenerator(someValue))    # create a task

When created, tasks run until the first yield operation yielding an ITaskSwitch results in the task being suspended. The task will then be resumed when the waited-on event fires its callbacks, and so on.

Tasks offer an isFinished ICondition that can be waited on, or checked to find out whether the task has successfully completed. See events.ITask for more details.

__init__ ( self,  iterator )

_start ( self )

_uncaughtError ( self )

fromProcedure ( klass,  ob )

step (
        self,
        source=None,
        event=NOT_GIVEN,
        )