[SciPy-user] rescuing old pickled numpy arrays

David M. Cooke cookedm at physics.mcmaster.ca
Mon Jun 19 15:03:34 CDT 2006

On Mon, Jun 19, 2006 at 02:51:36PM +0100, Cory Davis wrote:
> Hi All,
> this relates to a question I raised a few weeks ago about pickled arrays 
> from older Numpy versions not loading.  Here is what happens when I try 
> to load my old data ...
> ---> 51     return cPickle.load(infile)
> AttributeError: 'module' object has no attribute 'dtypedescr'
> Can anyone suggest an easy way to rescue this data?

The easy way I suppose would be to inject a 'dtypedescr' into the
appropiate module.

Have a look at the pickletools module. pickletools.dis() will
disassemble the pickle, so you could figure out what it's looking for.

At worst, you could use pickletools.genops() to pull out the data.

Can you send me a copy of a pickle? I may be able to cook up an upgrade

|David M. Cooke                      http://arbutus.physics.mcmaster.ca/dmc/
|cookedm at physics.mcmaster.ca

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