安装nltk
pip3 install nltk
安装nltk_data 打开 https://github.com/nltk/nltk_data 页面，点击绿色按钮下载整个压缩包。可以通过解压缩到指定的目录(目录可运行下面代码)
import nltk
print(nltk.data.path)
测试
from nltk.book import *
#输出以下结果则安装成功
*** Introductory Examples for the NLTK Book ***
Loading text1, ..., text9 and sent1, ..., sent9
Type the name of the text or sentence to view it.
Type: 'texts()' or 'sents()' to list the materials.
text1: Moby Dick by Herman Melville 1851
text2: Sense and Sensibility by Jane Austen 1811
text3: The Book of Genesis
text4: Inaugural Address Corpus
text5: Chat Corpus
text6: Monty Python and the Holy Grail
text7: Wall Street Journal
text8: Personals Corpus
text9: The Man Who Was Thursday by G . K . Chesterton 1908
但是，等运行代码时，发现如下错误：
[nltk_data] Error loading punkt: <urlopen error [WinError 10060]
按照提示操作还是不行，后来百度到了方法，记录一下
命令行进入python交互模式，运行如下：
import nltk
nltk.download()
然后会弹出一个窗口，点击models，找到punkt，双击进行下载即可。
