def update(self, dt):
for updater in self.updaters:
num_args = get_num_args(updater)
if num_args == 1:
updater(self)
elif num_args == 2:
updater(self, dt)
else:
raise Exception("Mobject updater expected 1 or 2 "
"arguments, %d given" % num_args)
def get_time_based_updaters(self):
return [
updater for updater in self.updaters if get_num_args(updater) == 2
]