python统计文本字符串里单词出现频率的方法
发布时间:2020-12-16 20:12:14 所属栏目:Python 来源:网络整理
导读:本篇章节讲解python统计文本字符串里单词出现频率的方法。供大家参考研究。具体实现方法如下: # word frequency in a text# tested with Python24 vegaseat 25aug2005# Chinese wisdom ...str1 = """Man who run in front of car,get tired.Man who
本篇章节讲解python统计文本字符串里单词出现频率的方法。分享给大家供大家参考。具体实现方法如下: # word frequency in a text # tested with Python24 vegaseat 25aug2005 # Chinese wisdom ... str1 = """Man who run in front of car,get tired. Man who run behind car,get exhausted.""" print "Original string:" print str1 print # create a list of words separated at whitespaces wordList1 = str1.split(None) # strip any punctuation marks and build modified word list # start with an empty list wordList2 = [] for word1 in wordList1: # last character of each word lastchar = word1[-1:] # use a list of punctuation marks if lastchar in [",",".","!","?",";"]: word2 = word1.rstrip(lastchar) else: word2 = word1 # build a wordList of lower case modified words wordList2.append(word2.lower()) print "Word list created from modified string:" print wordList2 print # create a wordfrequency dictionary # start with an empty dictionary freqD2 = {} for word2 in wordList2: freqD2[word2] = freqD2.get(word2,0) + 1 # create a list of keys and sort the list # all words are lower case already keyList = freqD2.keys() keyList.sort() print "Frequency of each word in the word list (sorted):" for key2 in keyList: print "%-10s %d" % (key2,freqD2[key2]) 希望本文所述对大家的Python程序设计有所帮助。 (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |