win7下，python3.4讀寫中文文件比python2方便一點兒了。只要在打開文件時指定編碼格式就可以了。
即：
f = open(fname,'r',encoding='utf-8')
f2 = open(fname2,'w',encoding='utf-8')
下面是一個調試通過的例子。讀log2目錄下utf-8格式的日誌文件，搜索“失敗”字符串，把搜到的結果寫到utf-8格式的rst.txt文件中。
# -*- coding: utf-8 -*-
import os
import sys
def main(filedir,keystr):
filelists = os.listdir(filedir)
fname2 = 'g:/log/rst.txt'
fw = open(fname2,'w',encoding='utf-8')
for fnamestr in filelists:
fname = os.path.join(filedir,fnamestr)
print(fname,keystr)
#continue
fhandle = open(fname,'r',encoding='utf-8')
line2 = fhandle.readline()
while line2:
if line2.find(keystr)>=0:
print(" ==",line2)
fw.write(line2)
line2 = fhandle.readline()
fhandle.close()
fw.close()
if __name__ == '__main__':
filedir = "g:/log2"
keystr = "失敗"
main(filedir,keystr)
print("Done!")