[SciPy-user] partially reading a file...
Wed Aug 6 09:30:40 CDT 2008
Travis E. Oliphant a écrit :
> fred wrote:
>> Let's say I want to read a (binary) file which contains a nx*ny*nz array.
>> Is it possible to read a "sub-array" from this file, ie each block of
>> (nx/4, ny/4, nz/4) for instance, without loading the whole file ?
> An easy way to do this which forces the operating system to do the work
> of partial loading is to use a memory mapped file as the source of the
> array (i.e. a memmap array).
> Then, selecting out a block is as simple as slicing.
Maybe I had to mention this: the aim is to cut in several files a
"large" data file, _bigger_ than total available memory amount.
Does memmap still apply ?
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