python 临时文件 | NamedTemporaryFile 不能使用生成的临时文件

Question

我想加载临时文件进行更改，或者只是能够将其上传到某个地方，当我尝试这样做时 - 它会抛出一个错误，如下所示

我已将权限设置为 w+ - 理想情况下应该允许我读写，不确定我在这里缺少什么 - 任何帮助将不胜感激 - 谢谢

>>> from openpyxl import load_workbook
>>> from tempfile import NamedTemporaryFile
>>> import os                     
>>> with NamedTemporaryFile(suffix=".xlsx", mode='w+', delete=True) as tmp:
...     temp_path = tmp.name                
...     os.path.exists(temp_path)           
...     wb = load_workbook(temp_path)       
... 
True
Traceback (most recent call last):
  File "<stdin>", line 4, in <module>
  File "C:\Users\my_name\VS_PROJECTS\.venv\lib\site-packages\openpyxl\reader\excel.py", line 315, in load_workbook
    reader = ExcelReader(filename, read_only, keep_vba,
  File "C:\Users\my_name\VS_PROJECTS\.venv\lib\site-packages\openpyxl\reader\excel.py", line 124, in __init__
    self.archive = _validate_archive(fn)
  File "C:\Users\my_name\VS_PROJECTS\.venv\lib\site-packages\openpyxl\reader\excel.py", line 96, in _validate_archive
    archive = ZipFile(filename, 'r')
  File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.8_3.8.2288.0_x64__qbz5n2kfra8p0\lib\zipfile.py", line 1251, in __init__
    self.fp = io.open(file, filemode)
PermissionError: [Errno 13] Permission denied: 'C:\Users\my_name\AppData\Local\Temp\tmp5dsrqegj.xlsx'

Answer 1

显然你在 Windows。

在 Windows 上，当 O_TEMPORARY 文件仍处于打开状态时，您无法打开它的另一个句柄（参见 https://github.com/bravoserver/bravo/issues/111, https://docs.python.org/3/library/tempfile.html#tempfile.NamedTemporaryFile, https://bugs.python.org/issue14243）。

您需要使用 delete=False 并手动清理，例如

try:
    with NamedTemporaryFile(suffix=".xlsx", mode='w+', delete=True) as tmp:
       temp_name = fp.name
       # ...
finally:
    try:
        os.unlink(temp_name)
    except Exception:
        pass

python 临时文件 | NamedTemporaryFile 不能使用生成的临时文件

python tempfile | NamedTemporaryFile can't use generated tempfile

python

openpyxl

temporary-files