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Python机器学习手册:从数据预处理到深度学习
book

Python机器学习手册:从数据预处理到深度学习

by Chris Albon
July 2019
Intermediate to advanced
365 pages
8h 13m
Chinese
Publishing House of Electronics Industry
Content preview from Python机器学习手册:从数据预处理到深度学习
102
6
处理文本
讨论
文本分词,尤其是将文本分为独立的单词是在清洗文本数据之后的常见任务,因为它是
将文本转换成能用于构建有效特征的数据的第一步。
6.5
 删除停止词(
stop word
问题描述
给定一组分好词的文本数据,删除其中非常常见但包含的信息又很少的单词(例如,
a
is
of
on
)。
解决方案
使用
NLTK
stopwords
#
加载库
from nltk.corpus import stopwords
#
如果是第一次使用停止词集,则需要先下载
# import nltk
# nltk.download('stopwords')
#
创建单词序列
tokenized_words = ['i',
'am',
'going',
'to',
'go',
'to',
'the',
'store',
'and',
'park']
#
加载停止词
stop_words = stopwords.words('english')
#
删除停止词
[word for word in tokenized_words if word not in stop_words]
['going', 'go', 'store', 'park']
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Publisher Resources

ISBN: 9787121369629