下载nltk的数据包
1,导入nltk包 ： import nltk
2,调用download() ：nltk.download()
3,在交互界面输入l 可以查看包含的数据的list：l
4,输入： d
再输入对应的包名：book
5,下载完毕之后，输入q推出下载模式
6，然后输入：from nltk.book import *
检证是否下载成功

>>> import nltk >>> nltk.download() NLTK Downloader --------------------------------------------------------------------------- d) Download l) List u) Update c) Config h) Help q) Quit --------------------------------------------------------------------------- Downloader> lPackages:[ ] abc................. Australian Broadcasting Commission 2006[ ] alpino.............. Alpino Dutch Treebank[ ] averaged_perceptron_tagger Averaged Perceptron Tagger[ ] averaged_perceptron_tagger_ru Averaged Perceptron Tagger (Russian)[ ] basque_grammars..... Grammars for Basque[ ] biocreative_ppi..... BioCreAtIvE (Critical Assessment of InformationExtraction Systems in Biology)略Downloader> d Download which package (l=list; x=cancel)?Identifier> bookDownloading collection u'book'| | Downloading package abc to /Users/yu**/nltk_data...| Unzipping corpora/abc.zip.| Downloading package brown to /Users/yu**/nltk_data...| Unzipping corpora/brown.zip.| Downloading package chat80 to /Users/yu**/nltk_data...| Unzipping corpora/chat80.zip.| Downloading package cmudict to /Users/yu**/nltk_data...| Unzipping corpora/cmudict.zip.| Downloading package conll2000 to /Users/yu**/nltk_data...| Unzipping corpora/conll2000.zip.| Downloading package conll2002 to /Users/yu**/nltk_data...| Unzipping corpora/conll2002.zip.| Downloading package dependency_treebank to| /Users/yu**/nltk_data...| Unzipping corpora/dependency_treebank.zip.| Downloading package genesis to /Users/yu**/nltk_data...| Unzipping corpora/genesis.zip.| Downloading package gutenberg to /Users/yu**/nltk_data...| Unzipping corpora/gutenberg.zip.| Downloading package ieer to /Users/yu**/nltk_data...| Unzipping corpora/ieer.zip.| Downloading package inaugural to /Users/yu**/nltk_data...| Unzipping corpora/inaugural.zip.| Downloading package movie_reviews to| /Users/yu**/nltk_data...| Unzipping corpora/movie_reviews.zip.| Error with downloaded zip fileDownloader> qTrue>>> from nltk.book import **** Introductory Examples for the NLTK Book ***Loading text1, ..., text9 and sent1, ..., sent9Type the name of the text or sentence to view it.Type: 'texts()' or 'sents()' to list the materials.text1: Moby Dick by Herman Melville 1851text2: Sense and Sensibility by Jane Austen 1811text3: The Book of Genesistext4: Inaugural Address Corpus。。。 略。。。

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