使用python把gdb格式的文本文件转为utf-8的格式

# coding=utf-8
from os import listdir

if __name__ =="__main__":
    d=u"D:\\files\\"
    fns = (fn for fn in listdir(d) if fn.endswith(".csv"))
    for fn in fns:
        with open(d+fn, 'rb+') as fp:
            content = fp.read()
            try:
                #
                content.decode("utf8")
            except:
                content = content.decode("gbk").encode("utf8")
                fp.seek(0)
                fp.write(content)