sudo pip install -U pyyaml nltk
import nltk
nltk.download()
搞不定，必须代理：
Installing via a proxy web server¶
If your web connection uses a proxy server, you should specify the proxy address as follows. In the case of an authenticating proxy, specify a username and password. If the proxy is set to None then this function will attempt to detect the system proxy.
>>> nltk.set_proxy('http://proxy.example.com:3128', ('USERNAME', 'PASSWORD')) >>> nltk.download()
然后下载：
输入d，下载模块，比如 stopwords等。
import nltk from nltk.stem.lancaster import LancasterStemmer def main(): english_punctuations = set([',', '.', ':', ';', '?', '(', ')', '[', ']', '!', '@', '#', '%', '$', '*']) stemmer = LancasterStemmer() stopwords = set(nltk.corpus.stopwords.words('english')) sentence = """At eight o'clock on Thursday morning Arthur didn't feel very good. interesting booking store.""" sentence = sentence.lower() tokens = nltk.word_tokenize(sentence) for word in tokens: if not word in english_punctuations: if not word in stopwords: word = stemmer.stem(word) print word if __name__ == '__main__': main()
输出：
eight
o'clock
thursday
morn
arth
n't
feel
good
interest
book
stor
本文转自张昺华-sky博客园博客，原文链接：http://www.cnblogs.com/bonelee/p/6937113.html，如需转载请自行联系原作者
