Name	Size	Mode	Actions
__pycache__/	-	0755	rm
py.typed	0	0644	editdlrm
version.py	142	0644	editdlrm
_api.py	8382	0644	editdlrm
_error.py	362	0644	editdlrm
_soft.py	1614	0644	editdlrm
_unix.py	1417	0644	editdlrm
_util.py	558	0644	editdlrm
_windows.py	1729	0644	editdlrm
__init__.py	1234	0644	editdlrm

import os import stat def raise_on_exist_ro_file(filename: str) -> None: try: file_stat = os.stat(filename) # use stat to do exists + can write to check without race condition except OSError: return None # swallow does not exist or other errors if file_stat.st_mtime != 0: # if os.stat returns but modification is zero that's an invalid os.stat - ignore it if not (file_stat.st_mode & stat.S_IWUSR): raise PermissionError(f"Permission denied: {filename!r}") __all__ = [ "raise_on_exist_ro_file", ]