0006.py

# coding = utf-8
__author__ = 'Forec'
import os, re

def find_word(file_path):
    file_list = os.listdir(file_path)
    word_dic = {}
    word_re = re.compile(r'[\w]+')
    for x in file_list:
        if os.path.isfile(x) and os.path.splitext(x)[1] =='.txt' :
            try:
                f = open(x, 'r')
                data = f.read()
                f.close()
                words = word_re.findall(data)
                for word in words:
                    if word not in word_dic:
                        word_dic[word] = 1
                    else:
                        word_dic[word] += 1
            except:
                print('Open %s Error' % x)
    Ans_List = sorted(word_dic.items(), key = lambda t : t[1], reverse = True)
    for key, value in Ans_List:
        print( 'Word ', key, 'appears %d times' % value )

find_word('.')