[yt-users] pickle

[Matthew Turk]

Hi Elizabeth,

We recently changed the mechanism of storing parameter files to be
off-by-default, which means that rather than dumping them to a .csv
file, they only stay in memory.  This functionality can be turned back
on (this change is documented in the development documentation.)  Can
you try:

1) Loading your parameter file, *then* loading your pickle.  I am
optimistic this will fix it.
2) If it doesn't, at the very top of your python script, put this:

from yt.config import ytcfg; ytcfg["yt","storeparameterfiles"] = "True"

-Matt

On Wed, Nov 30, 2011 at 4:46 AM, Elizabeth Tasker
<tasker at astro1.sci.hokudai.ac.jp> wrote:
> Hi,
>
> A bigger problem....
>
> The lastest version of yt
>
> The current version of the code is:
>
> ---
> a519b8754ba8 (yt) tip
> ---
>
>
> has problems with pickle. If I pickle a data set and then try and
> unpickle it, I see:
>
> unpickle core data
> ---------------------------------------------------------------------------
> KeyError                                  Traceback (most recent call last)
>
> /home/tasker/yt/src/yt-hg/scripts/iyt in <module>()
>    338
>    339     #file = open('cores.pickle','rb')
> --> 340     allcloudcores = cPickle.load(file('cores.pickle', 'rb'))
>    341     file.close()
>    342
>
> /home/tasker/yt/src/yt-hg/yt/data_objects/data_containers.pyc in
> _reconstruct_object(*args, **kwargs)
>   3676         else: new_args.append(arg)
>   3677     pfs = ParameterFileStore()
> -> 3678     pf = pfs.get_pf_hash(pfid)
>   3679     cls = getattr(pf.h, dtype)
>   3680     obj = cls(*new_args)
>
> /home/tasker/yt/src/yt-hg/yt/utilities/parameter_file_storage.pyc in
> get_pf_hash(self, hash)
>    106     def get_pf_hash(self, hash):
>    107         """ This returns a parameter file based on a hash. """
> --> 108         return self._convert_pf(self._records[hash])
>    109
>    110     def get_pf_ctid(self, ctid):
>
> KeyError: (('283b7c4d88671dbff7acf083098da6ae',), <function
> _reconstruct_object at 0x272c938>,
> ('283b7c4d88671dbff7acf083098da6ae', 'region', array([ 16.,  16.,
> 16.]), array([ 0.,  0.,  0.]), array([ 32.,  32.,  32.]),
> {'disk_center': array([16, 16, 16]), 'center': array([ 16.,  16.,
> 16.]), 'bulk_velocity': array([ 0.,  0.,  0.]), 'disk_vector':
> array([0, 0, 1]), 'disk_radius': array([  0.1   ,   0.1358,   0.1716,
>  0.2074,   0.2432,   0.279 ,
>
>
>
>
> The fact it mentions the field parameters in the last line, might mean
> it's an error introduced because of the corrections to them (that I
> have been demanding!)?
>
> The script I have works fine (pickles and all) on yt version:
>
> ---
> 16e8d749a806 (yt) tip
> ---
>
>
> Elizabeth
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