我收到NGramModel错误...请告诉我可能出错的地方。
Traceback (most recent call last):
File "ai7.py", line 87, in <module>
tt=NgramModel(1, tText, estimator)
NameError: name 'NgramModel' is not defined
我的目标是计算文本的困惑。
f_in = open("science.txt", 'r');
ln = f_in.read()
words = nltk.word_tokenize(ln)
my_bigrams = nltk.bigrams(words)
my_trigrams = nltk.trigrams(words)
s=""
tText = Text(words)
tText1 = Text(my_bigrams)
tText2 = Text(my_trigrams)
estimator = lambda fdist, bins: LidstoneProbDist(fdist, 0.2)
tt=NgramModel(1, tText, estimator)
tt1=NgramModel(2, tText1, estimator)
tt2=NgramModel(3, tText2, estimator)
print tt.perplexity(tText)
print tt1.perplexity(tText1)
print tt2.perplexity(tText2)
答案 0 :(得分:0)
您忘记导入NgramModel
您应该执行以下操作:
from nltk.model.ngram import NgramModel