File system operation blocked due to lack of OS read/write privileges or locked file.
Raised when an operation is denied by the operating system due to inadequate permissions, or when attempting to open a directory as a file.
Trying to write to a read-only directory, opening a file already locked exclusively by another process (e.g. Excel), or omitting filename in `open('/path/to/dir')`.
1with open('/usr/local/bin/config.json', 'w') as f:2 f.write('{"env": "prod"}') # PermissionError: [Errno 13] Permission denied1import os2from pathlib import Path3 4# Fix: Write to user directory or temporary directory5user_config = Path.home() / ".my_app" / "config.json"6user_config.parent.mkdir(parents=True, exist_ok=True)7 8with open(user_config, 'w') as f:9 f.write('{"env": "prod"}')Simulate standard system builds to trigger compiler trace records and track memory crashes locally.
Writing to `/usr/local/bin/` requires superuser (root) privileges. Standard user execution triggers an OS permission fault.