def index(self, dimension, nb_samples=500, window_duration=10 * 60):
self.imitator = self.nick_generator = None
history = list(get_history())
self.imitator = {}
for nickname, timed_messages in history:
_, messages = zip(*timed_messages)
imitator = Imitator(messages)
imitator.index(dimension)
self.imitator[nickname] = imitator
self.nick_generator = NicknameGenerator(history, nb_samples, window_duration)
