【Python 走进NLP】NLP词频统计和处理停用词，可视化

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# coding=utf-8
import requests
import sys
reload(sys)
sys.setdefaultencoding('utf-8')
from lxml import  etree
import time
time1=time.time()
import  bs4
import nltk
from bs4 import  BeautifulSoup
from nltk.corpus import stopwords############################抓取文本数据###########################
response = requests.get('http://php.net/')
html = response.content
# print (html)
soup = BeautifulSoup(html,"html5lib")
# 这需要安装html5lib模块
text = soup.get_text(strip=True)
tokens = [t for t in text.split()]
# print (tokens)################################处理停用词(英文停止词）#################
clean_tokens = list()
sr = stopwords.words('english')
for token in tokens:if token not in sr:clean_tokens.append(token)# ###############统计词频#################################freq = nltk.FreqDist(clean_tokens)
for key,val in freq.items():print (str(key) + ':' + str(val))########################词频可视化频率分布图:######################
freq.plot(20, cumulative=False)
# 需要安装matplotlib库

这里写图片描述

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