This release is a pre-release and may not be stable for production use.
The zc.lockfile package provides a basic portable implementation of interprocess locks using lock files. The purpose if not specifically to lock files, but to simply provide locks with an implementation based on file-locking primitives. Of course, these locks could be used to mediate access to other files. For example, the ZODB file storage implementation uses file locks to mediate access to file-storage database files. The database files and lock file files are separate files.
Detailed Documentation
Lock file support
The ZODB lock_file module provides support for creating file system locks. These are locks that are implemented with lock files and OS-provided locking facilities. To create a lock, instantiate a LockFile object with a file name:
>>> import zc.lockfile
>>> lock = zc.lockfile.LockFile('lock')
If we try to lock the same name, we’ll get a lock error:
>>> try:
... zc.lockfile.LockFile('lock')
... except zc.lockfile.LockError:
... print "Can't lock"
Can't lock
To release the lock, use it’s close method:
>>> lock.close()
The lock file is not removed. It is left behind:
>>> import os
>>> os.path.exists('lock')
True
Of course, now that we’ve released the lock, we can created it again:
>>> lock = zc.lockfile.LockFile('lock')
>>> lock.close()
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Release files for zc.lockfile 1.0.0b1
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Source distribution (sdist)
| File | Size | Uploaded | |
|---|---|---|---|
| zc.lockfile-1.0.0b1.tar.gz | 3.6 kB | Details |
Release files / zc.lockfile-1.0.0b1.tar.gz
| Download URL | zc.lockfile-1.0.0b1.tar.gz |
|---|---|
| Size | 3.6 kB |
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