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:
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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 :])
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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:
https://tool.zzvips.com/t/textcount/
希望本文所述对大家Python程序设计有所帮助。