관리-도구

편집 파일: _util.py

import os import stat import sys PermissionError = PermissionError if sys.version_info[0] == 3 else OSError def raise_on_exist_ro_file(filename): 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("Permission denied: {!r}".format(filename)) __all__ = [ "raise_on_exist_ro_file", "PermissionError", ]