def __init__(self, n, observation_sequence=None, default=0):
# In addition to the dictionary of n-tuples, cond_prob is a
# mapping from (w1, ..., wn-1) to P(wn | w1, ... wn-1)
CountingProbDist.__init__(self, default=default)
self.n = n
self.cond_prob = defaultdict()
self.add_sequence(observation_sequence or [])
def __init__(self, observation_sequence=None, default=0):
CountingProbDist.__init__(self, default=default)
self.n = 1
self.cond_prob = defaultdict()
self.add_sequence(observation_sequence or [])