Question

我正在使用以下脚本将副本权限添加到目录和子目录中的所有文件中，作为第一个参数传递的给定目录，运行脚本如下，但运行到下面的错误... 任何人都可以提供关于修复它的输入吗？

错误： -

C:\Dropbox\copyrights>python Add_copyright.py .
Traceback (most recent call last):
  File "Add_copyright.py", line 69, in <module>
    prepend_file(fullname, dirpath)
  File "Add_copyright.py", line 60, in prepend_file
    os.rename(temp_fname, fullname)
WindowsError: [Error 183] Cannot create a file when that file already exists

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 Qualcomm Atheros, 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)

Answer 1

如果要附加到现有文件，则需要以下内容：

with open(fullname, "ab") as in_file

问：您确定可以将shutil.copyfileobj(in_file, out_file)与已经写过的打开的out_file一起使用吗？

问：你知道哪一行造成了Windows错误吗？

感谢您的更新。

我敢打赌你的目录已经有一个名为fullname的文件，因此os.rename(temp_fname, fullname)失败并且“文件已存在”。

问：shutil.move会改变吗？

WindowsError：[错误183]当该文件已存在时无法创建文件

1 个答案: