NLTK 中的 Python 一致性命令

问题描述

我有一个关于 NLTK 中 Python concordance 命令的问题.首先，我通过一个简单的例子:

I have a question regarding Python concordance command in NLTK. First, I came through an easy example:

from nltk.book import *

text1.concordance("monstrous")

效果很好.现在，我有自己的 .txt 文件，我想执行相同的命令.我有一个名为textList"的列表，想找到CNA"这个词，所以我输入了命令

which worked just fine. Now, I have my own .txt file and I would like to perform the same command. I have a list called "textList" and want to find the word "CNA" so I put command

textList.concordance('CNA')

然而，我得到了错误

AttributeError: 'list' object has no attribute 'concordance'.

在这个例子中，text1 不是一个列表吗?我想知道这里发生了什么.

In the example, is the text1 NOT a list? I wonder what is going on here.

推荐答案

.concordance() 是一个特殊的 nltk 函数.所以你不能只在任何 python 对象上调用它(比如你的列表).

.concordance() is a special nltk function. So you can't just call it on any python object (like your list).

更具体地说:.concordance() 是 Text nltk 类

More specifically: .concordance() is a method in the Text class of nltk

基本上，如果你想使用.concordance()，你必须先实例化一个Text对象，然后在那个对象上调用它.

Basically, if you want to use the .concordance(), you have to instantiate a Text object first, and then call it on that object.

文本

文本通常从给定的文档或语料库初始化.例如:

import nltk.corpus
from nltk.text import Text
moby = Text(nltk.corpus.gutenberg.words('melville-moby_dick.txt'))

.concordance()

concordance(word, width=79,lines=25)

使用指定的上下文窗口打印单词的索引.单词匹配不区分大小写.

Print a concordance for word with the specified context window. Word matching is not case-sensitive.

所以我想像这样的东西会起作用(未测试)

So I imagine something like this would work (not tested)

import nltk.corpus
from nltk.text import Text
textList = Text(nltk.corpus.gutenberg.words('YOUR FILE NAME HERE.txt'))
textList.concordance('CNA')

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