A Tuesday 06 January 2009, Timmie escrigué:
> Hello,
> is it possible to add data to an existing hd5-file with pytables?
> I tried it and my original data got finally overwritten.

I re-read better the subject of this message, and I think that you 
missed to specify the 'a'ppend mode when you open the existing file.

> Is there a minimal example for this?

import tables
f = tables.openFile(you_filename, mode='a')
g = f.createGroup(f.root, 'newgroup')
a = f.createArray(g, 'newarray', [1,2])
f.close()

This creates a new group called 'newgroup' and a 'newarray' inside it.

Cheers,

-- 
Francesc Alted

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