接著上一篇文章機器學習之nltk download出錯：Error connecting to server: [Errno -2] ，下面說一下nltk測試包的安裝及要注意的事項
>>> import nltk
> nltk .download()NLTK Downloader---------------------------------------- ----------------------------------- d) Download l) List c) 機密 h) Help q ) Quit---------------------------------------------------- -----------------------------Downloader> dDownload which package (l=list; x=cancel)?Identifier>--------------------------------------------- ------------------------------ d) Download l) List c) Config h) Help q) Quit- -------------------------------------------------- ------------------------這裡要注意：這一步的時候要選擇l（list）Downloader> lPackages:
[ ] brown_tei........... Brown Corpus (TEI XML Version) [ ] punkt............... Punkt Tokenizer Models [ ] maxent_treebank_pos_tagger Treebank Part of Speech Tagger (Maximum entropy) [ ] machado............. Machado de Assis -- Obra Completa [ ] movie_reviews....... Sentiment Polarity Dataset Version 2.0 [ ] names............... Names Corpus, Version 1.3 (1994-03-29) [ ] nombank.1.0......... NomBank Corpus 1.0 [ ] nps_chat............ NPS Chat [ ] paradigms........... Paradigm Corpus [ ] pe08...... .......... Cross-Framework and Cross-Domain Parser Evaluation Shared Task) [ ] pil................. The Patient ( PIL) Corpus [ ] pl196x.............. Polish language of the XX century sixties [ ] ppattach............ Prepositional Phrase Attachment Corpus [ ] problem_reports..... Problem Report Corpus [ ] propbank............ Proposition Bank Corpus 1.0 [ ] qc........... ....... Experimental Data for Question Classification [ ] reuters............. The Reuters-21578 benchmark corpus, ApteMod ........... PASCAL RTE Challenges 1, 2, and 3Hit Enter to continue:查看所有的包，並找到你需要的包，然後不能按照提示收入點擊，而是應該這樣做：>>> nltk.download('brown_tei')注意：該方法可能會出現：
的錯誤，這時可使用下面的方法解決
或使用：
