通常在with tempfile...使用结束时添加，因此在离开上下文之前，类似于

for fname in pathlib.Path(td).glob('**/*.*'):  # make all writable for deletion
    fname.chmod(stat.S_IWRITE)

应该会有帮助。
注意，偶尔我仍然会看到PermissionError（“仍在使用中”），但不确定这在我的环境中是否有什么特殊之处。

这与Python中的删除只读目录相关但不完全相同-this answer中的一个可能的解决方案是在退出TemporaryDirectory()上下文管理器之前显式地修复权限。有关详细信息，请参见akaihola/darker#453。以下是实现的副本：

import os
import sys
from pathlib import Path
from typing import Union

WINDOWS = sys.platform.startswith("win")

def fix_py37_win_tempdir_permissions(dirpath: Union[str, Path]) -> None:
    """Work around a `tempfile` clean-up issue on Windows with Python 3.7

    Call this before exiting a ``with TemporaryDirectory():`` block or in teardown for
    a Pytest fixture which creates a temporary directory.

    See discussion in https://github.com/akaihola/darker/pull/393
    Solution borrowed from https://github.com/python/cpython/pull/10320

    :param dirpath: The root path of the temporary directory

    """
    if not WINDOWS or sys.version_info >= (3, 8):
        return
    for root, dirs, files in os.walk(dirpath):
        for name in dirs + files:
            path = os.path.join(root, name)
            try:
                os.chflags(path, 0)  # type: ignore[attr-defined]
            except AttributeError:
                pass
            os.chmod(path, 0o700)

下面是如何在Pytest单元测试中使用它，或者在使用tempfile创建临时目录时使用它：

import pytest

from my_utils import fix_py37_win_tempdir_permissions

@pytest.fixture
def myfixture(tmp_path):
    # setup code here
    yield tmp_path
    fix_py37_win_tempdir_permissions(tmp_path)

def myfunc():
    with TemporaryDirectory() as tmpdir:
        # work on the temporary directory here
        fix_py37_win_tempdir_permissions(tmp_path)