Raised when an attempt is made to unlock a file someone else locked. >>> try: ... raise NotMyLock ... except UnlockError: ... pas

Some other thread/process is locking the file. >>> try: ... raise AlreadyLocked ... except LockError: ... pass

Base class for other exceptions. >>> try: ... raise Error ... except Exception: ... pass

Lock access to a file using atomic property of link(2).

Base class for platform-specific lock classes.

Base class for error arising from attempts to acquire the lock. >>> try: ... raise LockError ... except Error: ... pass

Lock file creation failed for some other reason. >>> try: ... raise LockFailed ... except LockError: ... pass

Raised when lock creation fails within a user-defined period of time. >>> try: ... raise LockTimeout ... except LockError: ... pa

Lock file by creating a directory.

Raised when an attempt is made to unlock an unlocked file. >>> try: ... raise NotLocked ... except UnlockError: ... pass

Demonstration of using same SQL-based locking.

Base class for errors arising from attempts to release the lock. >>> try: ... raise UnlockError ... except Error: ... pass