Module locks

django.core.files.locks

Portable file locking utilities.

Based partially on an example by Jonathan Feignberg in the Python
Cookbook [1] (licensed under the Python Software License) and a ctypes port by
Anatoly Techtonik for Roundup [2] (license [3]).

[1] http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/65203
[2] https://sourceforge.net/p/roundup/code/ci/default/tree/roundup/backends/portalocker.py
[3] https://sourceforge.net/p/roundup/code/ci/default/tree/COPYING.txt

Example Usage::

    >>> from django.core.files import locks
    >>> with open('./file', 'wb') as f:
    ...     locks.lock(f, locks.LOCK_EX)
    ...     f.write('Django')

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