很少记录自己的学习历程,无奈太健忘,而且刚入手Python,还是写下来供以后参考和思考。
本篇主要利用python jieba分词和wordcloud进行词的可视化,其中去了停用词,单独计算了词频。也可以利用结巴自带的关键词提取方法。
附网址jieba:https://github.com/fxsjy/jieba
wordcloud:https://github.com/amueller/word_cloud
#导入要用的包
import pandas as pd
import numpy as np
import jieba
import jieba.analyse
import wordcloud.WordCloud
import os
import matplotlib.pyplot as plt
import matplotlib
matplotlib.style.use('ggplot')
%matplotlib inline
#我将要处理的文件放在了D盘,文件类似dataframe结构
os.chdir('D:')
comtent = pd.read_csv('dataframe.csv',dtype = 'object')
#将每列的keyword合并成一个字符串以便于处理
action = ''
for kw in content['keyword']:
action += kw.strip() + ' '
stopwords = open('stopword.txt').read().strip().splitlines()
seg = jieba.cut(action)
seg = ' '.join(seg).split() ######分词后的词都是Unicode格式
words = ''
for word in seg:
word = word.encode('utf-8') #####因为停用词是utf-8编码的,所以将其也编码为utf-8
if word not in stopwords:
words += word.strip() + ' '
words =words.decode('utf-8')
此处可以直接用wordcloud直接画图啦,用generate()函数
#计算词频
words = words.split()
word_freq = {}
for word in words:
if word in word_freq:
word_freq[word] += 1
else:
word_freq[word] = 1
#按词频排序,将dict类型转换成list类型
sort_word = []
for word,freq in word_freq.items():
sort_word.append((word,freq))
sorted_word = sorted(sort_word,key = lambda x:x[1],reverse = True)
##查看前100个高频词
for word in sorted_word[:100]:
print word[0],word[1]
#发现一个字的挺多,所以选择长度大于2的词
lengther = []
for word in sorted_word:
if len(word[0]) > 1:
lengther.append(word)
#画图啦
wordcloud1 = WordCloud(font_path = '..matplotlib\\mpl-data\\fonts\\ttf\\msyh.ttf',background_color = 'white',max_words = 200,stopwords = stopwords).generate_from_frequencies(dict(lengther))
plt.imshow(wordcloud1)
plt.axis('off')
plt.show()
结巴自动关键词提取(tf-idf,textrank)
tf-idf = jieba.analyse.extract_tags(action,topK = 200,withWeight = True)
textrank = jieba.analyse.textrank(action,topK = 200,withWeight = True)
画图部分省略,和上面的一样。。。
注:本文为原创,转载请注明出处。
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