本文實(shí)例講述了Python實(shí)現(xiàn)統(tǒng)計(jì)英文文章詞頻的方法。分享給大家供大家參考,具體如下:
應(yīng)用介紹:
統(tǒng)計(jì)英文文章詞頻是很常見的需求,本文利用python實(shí)現(xiàn)。
思路分析:
1、把英文文章的每個單詞放到列表里,并統(tǒng)計(jì)列表長度;
2、遍歷列表,對每個單詞出現(xiàn)的次數(shù)進(jìn)行統(tǒng)計(jì),并將結(jié)果存儲在字典中;
3、利用步驟1中獲得的列表長度,求出每個單詞出現(xiàn)的頻率,并將結(jié)果存儲在頻率字典中;
4、以字典鍵值對的“值”為標(biāo)準(zhǔn),對字典進(jìn)行排序,輸出結(jié)果(也可利用切片輸出頻率最大或最小的特定幾個,因?yàn)榻?jīng)過排序sorted()函數(shù)處理后,單詞及其頻率信息已經(jīng)存儲在元組中,所有元組再組成列表。)
代碼實(shí)現(xiàn):
fin = open('The_Magic_Skin _Honore_de_Balzac.txt') #the txt is up#to youlines=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 lists is the article list'''def total_num(s): return len(s)'''calculate the occurrence times of every wordt 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 wordw 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 dictionaryv 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 functionsoutput is the ten words with the largest frequency'''total = total_num(words_list())print(word_sort(word_fre(word_dic(words_list())))[-10:])PS:這里再為大家推薦2款相關(guān)統(tǒng)計(jì)工具供大家參考:
在線字?jǐn)?shù)統(tǒng)計(jì)工具:
http://tools.jb51.net/code/zishutongji
在線字符統(tǒng)計(jì)與編輯工具:
http://tools.jb51.net/code/char_tongji
更多關(guān)于Python相關(guān)內(nèi)容感興趣的讀者可查看本站專題:《Python文件與目錄操作技巧匯總》、《Python文本文件操作技巧匯總》、《Python數(shù)據(jù)結(jié)構(gòu)與算法教程》、《Python函數(shù)使用技巧總結(jié)》、《Python字符串操作技巧匯總》及《Python入門與進(jìn)階經(jīng)典教程》
希望本文所述對大家Python程序設(shè)計(jì)有所幫助。
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