Wraps the portalocker recipe for easy usage
Project description
Overview
Portalocker is a library to provide an easy API to file locking.
Originally created as a Python Recipe by Jonathan Feinberg and Lowell Alleman http://code.activestate.com/recipes/65203-portalocker-cross-platform-posixnt-api-for-flock-s/
The module is currently maintained by Rick van Hattem <Wolph@wol.ph>. The project resides at https://github.com/WoLpH/portalocker . Bugs and feature requests can be submitted there. Patches are also very welcome.
Links
- Documentation
- Bug reports
- Package homepage
- My blog
Examples
To make sure your cache generation scripts don’t race, use the Lock class:
>>> import portalocker
>>> with portalocker.Lock('somefile', timeout=1) as fh:
print >>fh, 'writing some stuff to my cache...'
To customize the opening and locking a manual approach is also possible:
>>> import portalocker
>>> file = open('somefile', 'r+')
>>> portalocker.lock(file, portalocker.LOCK_EX)
>>> file.seek(12)
>>> file.write('foo')
>>> file.close()
There is no explicit need to unlock the file as it is automatically unlocked after file.close(). If you still feel the need to manually unlock a file than you can do it like this:
>>> portalocker.unlock(file)
Do note that your data might still be in a buffer so it is possible that your data is not available until you flush() or close().
Changelog
See CHANGELOG file
License
see the LICENSE file
Release history Release notifications | RSS feed
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