QQ:231469242 欢迎喜欢nltk朋友交流 http://www.cnblogs.com/undercurrent/p/4754944.html 一.信息提取模型 信息提取的步骤共分为五步,原始数据为未经处理的字符串, 第一步:分句,用nltk.sent_tokenize(text)实现,得到一个list of strings 第二步:分词,[nltk.word_tokenize(sent) for sent in sentences]实现,得到list of lists of stri…
一.信息提取模型 信息提取的步骤共分为五步,原始数据为未经处理的字符串, 第一步:分句,用nltk.sent_tokenize(text)实现,得到一个list of strings 第二步:分词,[nltk.word_tokenize(sent) for sent in sentences]实现,得到list of lists of strings 第三步:标记词性,[nltk.pos_tag(sent) for sent in sentences]实现得到一个list of lists of…
import nltk from nltk.book import * nltk.corpus.gutenberg.fileids() emma = nltk.corpus.gutenberg.words('austen-emma.txt') len(emma) emma = nltk.Text(nltk.corpus.gutenberg.words('austen-emma.txt')) emma.concordance("surprize") from nltk.corpus im…
16.1.1 构造字符串程序清单16.1使用了string的7个构造函数.程序清单16.1 str1.cpp--------------------------------------------------// str1.cpp -- introducing the string class#include <iostream>#include <string>// using string constructors int main(){ using namespace…
http://blog.csdn.net/huyoo/article/details/12188573 官方数据 http://www.nltk.org/book/ Natural Language Processing with Python – Analyzing Text with the Natural Language Toolkit Steven Bird, Ewan Klein, and Edward Loper This version of the NLTK book is u…
