ณ๒ 4าวIc@sdefd„ƒYZdS(tModelIcBsDeZdZd„Zd„Zd„Zd„Zd„Zd„ZRS(sN A processing interface for assigning a probability to the next word. cCs tƒ‚dS(sCreate a new language model.N(tNotImplementedError(tself((s$/p/zhu/06/nlp/nltk/nltk/model/api.pyt__init__ scCs tƒ‚dS(s6Evaluate the probability of this word in this context.N(R(Rtwordtcontext((s$/p/zhu/06/nlp/nltk/nltk/model/api.pytprob scCs tƒ‚dS(sEEvaluate the (negative) log probability of this word in this context.N(R(RRR((s$/p/zhu/06/nlp/nltk/nltk/model/api.pytlogprobscCs tƒ‚dS(s@Randomly select a word that is likely to appear in this context.N(R(RR((s$/p/zhu/06/nlp/nltk/nltk/model/api.pytchoose_random_wordscCs tƒ‚dS(s1Generate n words of text from the language model.N(R(Rtn((s$/p/zhu/06/nlp/nltk/nltk/model/api.pytgeneratescCs tƒ‚dS(sŽEvaluate the total entropy of a message with respect to the model. This is the sum of the log probability of each word in the message.N(R(Rttext((s$/p/zhu/06/nlp/nltk/nltk/model/api.pytentropys( t__name__t __module__t__doc__RRRRR R (((s$/p/zhu/06/nlp/nltk/nltk/model/api.pyRs     N(tobjectR(((s$/p/zhu/06/nlp/nltk/nltk/model/api.pyss