python之错误文件未打开以供读取

我正在使用以下脚本为作为第一个参数传递的给定目录的目录和子目录中的所有文件添加复制权，我按如下方式运行脚本但遇到以下错误... 任何人都可以提供关于 ohw 的意见来修复它吗？

错误:-

C:\Dropbox\copyrights>python Add_copyright.py . 
Traceback (most recent call last): 
  File "Add_copyright.py", line 70, in <module> 
    prepend_file(fullname, dirpath) 
  File "Add_copyright.py", line 50, in prepend_file 
    shutil.copyfileobj(in_file, out_file) 
  File "C:\Python27\lib\shutil.py", line 49, in copyfileobj 
    buf = fsrc.read(length) 
IOError: File not open for reading 

代码:-

import fnmatch 
import os 
import shutil 
import sys 
import tempfile 
 
file_patterns_to_match = ['*.c','*.h','*.cpp','*.txt'] 
 
headertext = """/* 
 * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved. 
 * 
 * Previously licensed under the ISC license by Company, Inc. 
 * 
 * 
 * Permission to use, copy, modify, and/or distribute this software for 
 * any purpose with or without fee is hereby granted, provided that the 
 * above copyright notice and this permission notice appear in all 
 * copies. 
 * 
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL 
 * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED 
 * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE 
 * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 
 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 
 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER 
 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 
 * PERFORMANCE OF THIS SOFTWARE. 
 */ 
""" 
 
# make any newlines in headertext match the system line ending 
headertext = headertext.replace('\n', os.linesep) 
 
def want_this_file(fname): 
    for pat in file_patterns_to_match: 
        if fnmatch.fnmatch(fname, pat): 
            return True 
    return False 
 
def prepend_file(fullname, path): 
    # with statement means temp file is written and closed at end of with 
    with tempfile.NamedTemporaryFile(dir=path, delete=False) as out_file: 
        # get the name immediately 
        temp_fname = out_file.name 
 
        try: 
            # use binary mode to avoid newline translations 
            with open(fullname, "rb") as in_file: 
                out_file.write(headertext) 
                shutil.copyfileobj(in_file, out_file) 
        except Exception: 
            # on any error, clean up temp file and re-raise exception 
            try: 
                os.remove(temp_fname) 
            except Exception: 
                print("unable to clean up temp file: " + temp_fname) 
                pass 
            raise 
    # rename temp file to fullname, clobbering original 
    os.rename(temp_fname, fullname) 
 
 
start_directory = sys.argv[1] 
 
for dirpath, dirnames, filenames in os.walk(start_directory): 
    for fname in filenames: 
        if want_this_file(fname): 
            fullname = os.path.join(dirpath, fname) 
            prepend_file(fullname, dirpath) 

请您参考如下方法:

您可能希望用 try ... except block 包装 shutil.copyfileobj(in_file, out_file) 以找出导致问题的特定文件。这听起来像是一个非典型的权限问题——通常会抛出 IOError: [Errno 13] Permission denied——或者你可能在磁盘上的一个输入文件中有损坏。 (此脚本适用于我在 OS X、Windows 和 Windows/Cygwin 上的工作。)