'@param step: The number of seconds between calls.
@type step: L{float}
@param callable: Function to call
@type callable: L{callable}
@param args: Positional arguments to pass to function
@param kwargs: Keyword arguments to pass to function'

def __init__(self, step, callable, *args, **kwargs):

    self.step = step
    self.call = (callable, args, kwargs)
    self.clock = None
