[Numpy-discussion] Accessing a numpy array in a mmap fashion

Ryan May rmay at ou.edu
Thu Aug 30 11:33:29 EDT 2007

Brian Donovan wrote:
> Hello all,
>   I'm wondering if there is a way to use a numpy array that uses disk as
> a memory store rather than ram. I'm looking for something like mmap but
> which can be used like a numpy array. The general idea is this. I'm
> simulating a system which produces a large dataset over a few hours of
> processing time. Rather than store the numpy array in memory during
> processing I'd like to write the data directly to disk but still be able
> to treat the array as a numpy array. Is this possible? Any ideas?

What you're looking for is numpy.memmap, though the documentation is
eluding me at the moment.


Ryan May
Graduate Research Assistant
School of Meteorology
University of Oklahoma

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