Python - 语料库访问
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简述
Corpora 是一个提供多个文本文档集合的组。单个集合称为语料库。其中一个著名的语料库是古腾堡语料库,其中包含大约 25,000 本免费电子书,托管在 http://www.gutenberg.org/。在下面的示例中,我们仅访问语料库中那些文件名以 .txt 结尾的纯文本文件的名称。from nltk.corpus import gutenberg fields = gutenberg.fileids() print(fields)
当我们运行上述程序时,我们得到以下输出 -[austen-emma.txt', austen-persuasion.txt', austen-sense.txt', bible-kjv.txt', blake-poems.txt', bryant-stories.txt', burgess-busterbrown.txt', carroll-alice.txt', chesterton-ball.txt', chesterton-brown.txt', chesterton-thursday.txt', edgeworth-parents.txt', melville-moby_dick.txt', milton-paradise.txt', shakespeare-caesar.txt', shakespeare-hamlet.txt', shakespeare-macbeth.txt', whitman-leaves.txt']
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访问原始文本
我们可以使用在 nltk 中也可用的 sent_tokenize 函数从这些文件中访问原始文本。在下面的示例中,我们检索 blake poen 文本的前两段。from nltk.tokenize import sent_tokenize from nltk.corpus import gutenberg sample = gutenberg.raw("blake-poems.txt") token = sent_tokenize(sample) for para in range(2): print(token[para])
当我们运行上述程序时,我们得到以下输出 -[Poems by William Blake 1789] SONGS OF INNOCENCE AND OF EXPERIENCE and THE BOOK of THEL SONGS OF INNOCENCE INTRODUCTION Piping down the valleys wild, Piping songs of pleasant glee, On a cloud I saw a child, And he laughing said to me: "Pipe a song about a Lamb!" So I piped with merry cheer.