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LINGUISTICA GENERALE E COMPUTAZIONALE, PARTE 2

LINGUISTICA GENERALE E COMPUTAZIONALE, PARTE 2. Lezione 4: Capitolo 3, parte prima ( Trattamento di testi ). Operazioni da eseguire ogni volta. >>> from __future__ import division >>> import nltk , re, pprint. Accesso a web via URL. >>> from urllib import urlopen

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LINGUISTICA GENERALE E COMPUTAZIONALE, PARTE 2

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  1. LINGUISTICA GENERALE E COMPUTAZIONALE, PARTE 2 Lezione 4: Capitolo 3, parte prima (Trattamentoditesti)

  2. Operazionidaeseguireognivolta >>> from __future__ import division >>> import nltk, re, pprint

  3. Accesso a web via URL >>> from urllib import urlopen >>> url = "http://www.gutenberg.org/files/2554/2554.txt" >>> raw = urlopen(url).read() >>> type(raw) <type 'str'> >>> len(raw) 1176831 >>> raw[:75] 'The Project Gutenberg EBook of Crime and Punishment, by Fyodor Dostoevsky\r\n'

  4. Tokenizzazione >>> tokens = nltk.word_tokenize(raw) >>> type(tokens) <type 'list'> >>> len(tokens) 255809 >>> tokens[:10] ['The', 'Project', 'Gutenberg', 'EBook', 'of', 'Crime', 'and', 'Punishment', ',', 'by']

  5. Apriredocumentilocali >>> import os >>> os.listdir('.') >>> f = open('document.txt')

  6. Tipi didocumenti • HTML (p.81) • PDF (p. 85)

  7. Operazionisustringhe • P.87-92

  8. Espressioniregolari • import re • re.search()

  9. Normalizzazioneetokenizzazioneusandoespressioniregolari

  10. Unicode

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