Module portalocker

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@my-deja.com> in the documentation that accompanies the win32 modules.

Imports: os, win32con, win32file, pywintypes, fcntl