Re: [Pytables-users] Can't pickle <type 'function'>: attribute lookup __builtin__.function failed

[Josh A. <jos...@gm...>]

Jennifer,

When adding a Python object to a VLArray, PyTables first pickles the
object.  It looks like you're trying to add something that can't be
pickled.  Check the type of the 'state' variable in the first line of the
stack trace and make sure it's something that can be pickled.  See [1] for
more details.

Hope that helps,
Josh

[1]:
http://docs.python.org/2/library/pickle.html#what-can-be-pickled-and-unpickled




On Wed, Dec 12, 2012 at 4:58 AM, Jennifer Flegg <jen...@ww...>wrote:

> Hi All,
> I'm getting errors of this sort when I use pytables to store data in hdf5
> format.
> Has anyone come across this before? Is there a fix?
> Thanks,
> Jennifer
>
> File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7
> /lib/python2.7/site-packages/pymc/database/hdf5.py", line 474,
> in savestate    s.append(state)
> File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7
> /lib/python2.7/site-packages/tables/vlarray.py", line 462, in append
>     sequence = atom.toarray(sequence)
> File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7
> /lib/python2.7/site-packages/tables/atom.py", line 1000, in toarray
>     buffer_ = self._tobuffer(object_)
> File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7
> /lib/python2.7/site-packages/tables/atom.py", line 1112, in _tobuffer
>     return cPickle.dumps(object_, cPickle.HIGHEST_PROTOCOL)
> PicklingError: Can't pickle <type 'function'>:
> attribute lookup __builtin__.function failed
>
>
>
>
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