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Hello,

I have the following scenario: I'm using the new multiprocessing module in Python 2.6. I'm using a Pool to do calculations which produce results which I want to write to a HDF file.

I think the worker processes should do the writing, since the results are too big to be cached in memory by the master process until all the work is done.

So I would like to lock the HDF file while each worker process is writing to it to avoid problems (I'm assuming things will go wrong if multiple processes write to the same HDF file at the "same" time).

The object returned from tables.openFile doesn't seem to work with fcntl. I get the following error:

TypeError?: argument must be an int, or have a fileno() method.

I don't see any other method on the tables.file.File object to retrieve the file handle.

Is something like this possible? If not, could support for fcntl please be added to pytables?

Regards,

Albert