Python每日一练(1):计算文件夹内各个文章中出现次数最多的单词

#coding:utf-8
import os,re

path = ‘test‘
files = os.listdir(path)

def count_word(words):
    dic = {}
    max = 0
    marked_key = ‘‘
    #计算每个单词出现的次数
    for word in words:
        if dic.has_key(word) is False:
            dic[word] = 1
        else:
            dic[word] = dic[word] +1
    #每个字典的值之间做比较，得出最大的那个数字
    for key,value in dic.items():
        if dic[key] > max:
            max = dic[key]
            marked_key = key
    #跳出for循环打印出单词和单词出现的次数
    print(marked_key,max)

for f in files:
    with open(os.path.join(path,f)) as diary:
        words = re.findall("[a-zA-Z]+‘*-*[a-zA-z]", diary.read())
        count_word(words)

#has_key(key) ： 函数用于判断键是否存在于字典中，如果键在字典dict里返回true，否则返回false。这里用于判断字典内的键是否出现过。