[Numpy-discussion] Efficient reading of binary data
Fri Apr 4 04:33:38 CDT 2008
On Fri, Apr 4, 2008 at 1:50 AM, Sebastian Haase <email@example.com> wrote:
> Accidentally I'm exactly trying to do the same thing right now .....
> What is the best way of memmapping into a file that is already open !?
> I have to read some text (header info) off the beginning of the file
> before I know where the data actually starts.
> I could of course get the position at that point ( f.tell() ) close
> the file, and reopen using memmap.
> However this doesn't sound optimal to me ....
> Any hints ?
> Could numpy's memmap be changed to also accept file-objects, or there
> a "rule" that memmap always has to have access to the entire file ?
I am getting a little tired, so this may be incorrect. But I believe
Stefan modified memmaps to allow them to be created from file-like
Are you running a released version of NumPy or the trunk? If you
aren't using the trunk, could you give it a try? It would be good to
have it tested before the 1.0.5 release.
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