python - Error when extract noun-phrases from the training corpus and remove stop words using NLTK -


i new both, python , nltk. have extract noun phrase corpus , remove stop words using nltk. coding still have error. can me fix problem? or please recommend if there better solution. thank you

import nltk nltk.tokenize import word_tokenize nltk.corpus import stopwords  docid='19509' title='example noun-phrase , stop words' print('document id:'),docid print('title:'),title  #list noun phrase content='this sample sentence, showing off stop words filtration.' is_noun = lambda pos: pos[:2] == 'nn' tokenized = nltk.word_tokenize(content) nouns = [word (word,pos) in nltk.pos_tag(tokenized) if is_noun(pos)] print('all noun phrase:'),nouns  #remove stop words stop_words = set(stopwords.words("english"))  example_words = word_tokenize(nouns) filtered_sentence = []  w in example_words:   if w not in stop_words:      filtered_sentence.append(w)  print('without stop words:'),filtered_sentence

and got following error

traceback (most recent call last):  file "c:\users\user\desktop\nlp\stop_word.py", line 20, in <module>   example_words = word_tokenize(nouns)  file "c:\python27\lib\site-packages\nltk\tokenize\__init__.py", line 109,in   word_tokenize   return [token sent in sent_tokenize(text, language)  file "c:\python27\lib\site-packages\nltk\tokenize\__init__.py", line 94, in   sent_tokenize   return tokenizer.tokenize(text)  file "c:\python27\lib\site-packages\nltk\tokenize\punkt.py", line 1237, in   tokenize   return list(self.sentences_from_text(text, realign_boundaries))  file "c:\python27\lib\site-packages\nltk\tokenize\punkt.py", line 1285, in   sentences_from_text   return [text[s:e] s, e in self.span_tokenize(text,realign_boundaries)]  file "c:\python27\lib\site-packages\nltk\tokenize\punkt.py", line 1276, in   span_tokenize   return [(sl.start, sl.stop) sl in slices]  file "c:\python27\lib\site-packages\nltk\tokenize\punkt.py", line 1316, in   _realign_boundaries   sl1, sl2 in _pair_iter(slices):  file "c:\python27\lib\site-packages\nltk\tokenize\punkt.py", line 310, in   _pair_iter   prev = next(it)  file "c:\python27\lib\site-packages\nltk\tokenize\punkt.py", line 1289, in   _slices_from_text   match in self._lang_vars.period_context_re().finditer(text): typeerror: expected string or buffer

you getting error because function word_tokenize expecting string argument , give list of strings. far understand trying achieve, not need tokenize @ point. until print('all noun phrase:'),nouns, have nouns of sentence. remove stopwords, can use:

### remove stop words ### stop_words = set(stopwords.words("english")) # find nouns not in stopwords nouns_without_stopwords = [noun noun in nouns if noun not in stop_words] # sentence clear print('without stop words:',nouns_without_stopwords)

of course, in case have same result nouns, because none of nouns stopword.

i hope helps.


Comments

Post a Comment

Popular posts from this blog

commonjs - How to write a typescript definition file for a node module that exports a function? -

consider, toml node module can use: // toml.d.ts declare module toml { export function parse(value:string):any; } declare module "toml" { export = toml; } then: /// <reference path="../../../../../defs/toml/toml.d.ts"/> import toml = require('toml'); toml.parse(...); however, node module export single function, such 'glob' ( https://github.com/isaacs/node-glob ). the node usage of module be: var glob = require("glob") glob("*.js", {}, callback(err, files) { ... }); you'd naively expect this: // glob.d.ts declare function globs(paths:string, options:any, callback:{(err:any, files:string[]):void; ...but because typescripts 'import' semantics bit strange, seems can use 'import .. = require()' statement alias modules . trying call: /// <reference path="../../../../../defs/glob/glob.d.ts"/> import blog = require('glob'); results in: error ts2072: mod
Read more

openid - Okta: Failed to get authorization code through API call -

i'm integrating okta own idp server using okta's api. i'm implementing authorization code flow following steps below: in own server, use /api/v1/authn endpoint sessiontoken. use sessiontoken obtain authorization calling endpoint: /oauth2/v1/authorize?client_id=" + clientid + "&sessiontoken=" + sessiontoken + "&response_type=code&response_mode=query&scope=openid&redirect_uri=" + redirecturl + "&state=evanyang&nonce=" it's supposed return response status code 302 , location header containing redirect url code value. however, keep getting response status code 200 , without location header, html body saying "you using unsupported browser." , "javascript disabled on browser." according api documentation: http://developer.okta.com/docs/api/resources/oidc.html#authentication-request , sessiontoken parameter sufficient this: an okta one-time sessiontoken. allows api-based
Read more

thorough guide for profiling racket code -

did googling ("racket profiling", "racket measure performance"), didn't find , there no examples in docs. did google "profile" search on htdp - no luck. (profile (f ...)) output isn't obvious other small snippets. ideally want python's python -m cprofile usage examples. when search "python profiling", both duckduckgo , google give top result: 26.4. python profilers . (although scanned quickly, seems more of reference "thorough usage guide" examples. if had else in mind, perhaps please link that?) the equivalent racket documentation be: profile: statistical profiler . a usage example: #lang racket (require profile) (profile-thunk (thunk (function-to-profile arg0 arg1) )) here (thunk e) convenience (lambda () e) . bigger example: #lang racket (module mod racket (provide f) (define (f) (for/list ([i 10000]) i))) (require (prefix-in mod: 'mod)) (define (f) (for ([i 10000
Read more