August 2022
Intermediate to advanced
441 pages
11h 26m
Chinese
Content preview from Python文本分析
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
122
｜
第
4
章
4.6.1
实例化流水线
下面，我们来学习使用
spaCy
。第一步，我们需要实例化
spaCy
的
Language
类的对象，
为此需要调用
spacy.load()
，并指定将要使用的模型文件名。
注
6
在本章中，我们
将使用小型英语模型
en_core_web_sm
。
Language
对象的变量通常会命名为
nlp
：
import spacy
nlp = spacy.load('en_core_web_sm')
现在，这个
Language
对象中包含共享词汇表、模型以及处理流水线。你可以通过对
象的以下属性检查流水线组件：
nlp.pipeline
输出结果：
[('tagger', <spacy.pipeline.pipes.Tagger at 0x7fbd766f84c0>),
('parser', <spacy.pipeline.pipes.DependencyParser at 0x7fbd813184c0>),
('ner', <spacy.pipeline.pipes.EntityRecognizer at 0x7fbd81318400>)]
默认的流水线由词性标注器（
tagger
）、解析器（
parser
）和命名实体识别器（
ner
）
组成，所有这些都需要根据特定的语言选择。这里没有明确列出分词器，是因为分
词器在任何情况下都是必需的。
spaCy
的分词器非常快，但是所有其他步骤都基于神经模型，并且需要花费大量时间。
但是与其他库相比，
spaCy
的模型是最快的。处理整个流水线所需的时间仅是分词
的
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.