python实现统计文本中单词出现的频率

#coding=utf-8
import os
from collections import Counter
sumsdata=[]
for fname in os.listdir(os.getcwd()):
if os.path.isfile(fname) and fname.endswith('.txt'):
with open(fname,'r') as fp:
data=fp.readlines()
fp.close()
sumsdata+=[line.strip().lower() for line in data]
cnt=Counter()
for word in sumsdata:
cnt[word]+=1
cnt=dict(cnt)
for key,value in cnt.items():
print(key+":"+str(value))