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Python实现统计英文文章词频的方法分析

更新时间:2020-06-23 07:18:01 作者:startmvc
本文实例讲述了Python实现统计英文文章词频的方法。分享给大家供大家参考,具体如下:应

本文实例讲述了Python实现统计英文文章词频的方法。分享给大家供大家参考,具体如下:

应用介绍:

统计英文文章词频是很常见的需求,本文利用python实现。

思路分析:

1、把英文文章的每个单词放到列表里,并统计列表长度; 2、遍历列表,对每个单词出现的次数进行统计,并将结果存储在字典中; 3、利用步骤1中获得的列表长度,求出每个单词出现的频率,并将结果存储在频率字典中; 4、以字典键值对的“值”为标准,对字典进行排序,输出结果(也可利用切片输出频率最大或最小的特定几个,因为经过排序sorted()函数处理后,单词及其频率信息已经存储在元组中,所有元组再组成列表。)

代码实现:


fin = open('The_Magic_Skin _Honore_de_Balzac.txt') #the txt is up
#to you
lines=fin.readlines()
fin.close()
'''transform the article into word list
'''
def words_list():
 chardigit='ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789 '
 all_lines = ''
 for line in lines:
 one_line=''
 for ch in line:
 if ch in chardigit:
 one_line = one_line + ch
 all_lines = all_lines + one_line
 return all_lines.split()
'''calculate the total number of article list
s is the article list
'''
def total_num(s):
 return len(s)
'''calculate the occurrence times of every word
t is the article list
'''
def word_dic(t):
 fre_dic = dict()
 for i in range(len(t)):
 fre_dic[t[i]] = fre_dic.get(t[i],0) + 1
 return fre_dic
'''calculate the occurrence times of every word
w is dictionary of the occurrence times of every word
'''
def word_fre(w):
 for key in w:
 w[key] = w[key] / total
 return w
'''sort the dictionary
v is the frequency of words
'''
def word_sort(v):
 sort_dic = sorted(v.items(), key = lambda e:e[1])
 return sort_dic
'''This is entrance of functions
output is the ten words with the largest frequency
'''
total = total_num(words_list())
print(word_sort(word_fre(word_dic(words_list())))[-10:])

PS:这里再为大家推荐2款相关统计工具供大家参考:

在线字数统计工具: http://tools.jb51.net/code/zishutongji

在线字符统计与编辑工具: http://tools.jb51.net/code/char_tongji

Python 统计 英文文章 词频