Python实现英文文章词频统计的完整流程与代码解析

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:])