portalocker 1.0b - Simple cross-platform (nt/posix) advisory file locking

[Jonathan Feinberg]

Please, experienced Pythonistas: examine, critique, patch, and extend
to other platforms.  I am fairly new to Python, so my method of
platform-specific code segregation might strike you as inelegant or
worse.  I welcome all constructive comments.

   http://www.panix.com/~jdf/python/portalocker.py

Cross-platform (posix/nt) API for flock-style file locking.

Synopsis:

   import portalocker
   file = open("somefile", "r+")
   portalocker.lock(file, portalocker.LOCK_EX)
   file.seek(12)
   file.write("foo")
   file.close()

If you know what you're doing, you may choose to

   portalocker.unlock(file)

before closing the file, but why?

Methods:

   lock( file, flags )
   unlock( file )

Constants:

   LOCK_EX
   LOCK_SH
   LOCK_NB

I learned the win32 technique for locking files from sample code
provided by John Nielsen <nielsenjf at my-deja.com> in the documentation
that accompanies the win32 modules.

-- 
Jonathan Feinberg   jdf at pobox.com   Sunny Brooklyn, NY
http://pobox.com/~jdf