python统计字符串中单词数量

python# -*- coding: utf-8 -*-#python 2.7import reprint u'请输入字符串：'wz = raw_input()s = wz.lower()#小写单词的正则表达式r='[a-z]+'#找到所有单词ws = re.findall(r,s)#定义一个字典来存储单词和次数dt = {}for w in ws:dt[w] = dt.setdefault(w,0)+1#wd来...