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import codecsimport chardetimport sysreload(sys)sys.setdefaultencoding('utf-8')  #如果没有这部分，WriteFile会报错def RedaFile(filename,encoding="utf-8"):    with codecs.open(filename,"r") as f:        content = f.read()        f.close()        if chardet.detect(content)["encoding"] == encoding:    #只转utf8编码的            return content        else:                        return Nonedef WriteFile(filename,content,encoding="gb18030"):    with codecs.open(filename,"wb",encoding) as f:        f.write(content)        f.close()        def utf8_to_ansi(src,dst):    content = RedaFile(src,encoding="utf-8")    if content:        WriteFile(dst,content,encoding="gb18030")        print "change file is %s"%dst    def FilesFormat(path):    for root, dirs, files in os.walk(path):        for f in files:            if f[-2:] == '.c' or f[-2:] == '.h':          #只转.c和.h文件                utf8_to_ansi(root+"\\"+f, root+"\\"+f)       #新文件覆盖旧文件                        if __name__ == "__main__":    FilesFormat(r'D:\pt-ct-em_ansi')    #文件夹目录    print "ALL FILES DONE!"

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