[yt-users] ProfilePlot error: weakly-referenced object no longer exists

[Matthew Turk]

A workaround would be to retain the ds's loaded in memory, for
instance by appending them to a list or something.  Not a solution,
but a workaround.

On Thu, Aug 20, 2015 at 6:55 PM, Nathan Goldbaum <nathan12343 at gmail.com> wrote:
> I can reproduce this and have opened an issue to track it:
> https://bitbucket.org/yt_analysis/yt/issues/1069/data-objects-used-to-create-a-profile-in-a
>
>
> On Thu, Aug 20, 2015 at 6:33 PM, Mateusz Ruszkowski <mateuszr at umich.edu>
> wrote:
>>
>>
>>
>>    Hi,
>>
>> I am trying to plot two profiles on one plot and adjust xlim. I am getting
>> the following error message:
>>
>> Traceback (most recent call last):
>>   File "test.py", line 17, in <module>
>>     plot.set_xlim([0.1, 1.0])
>>   File
>> "/home/mateuszr/my_yt/yt-x86_64/src/yt-hg/yt/visualization/plot_container.py",
>> line 62, in newfunc
>>     rv = f(*args, **kwargs)
>>   File
>> "/home/mateuszr/my_yt/yt-x86_64/src/yt-hg/yt/visualization/profile_plotter.py",
>> line 547, in set_xlim
>>     extrema=extrema, units=units)
>>   File
>> "/home/mateuszr/my_yt/yt-x86_64/src/yt-hg/yt/data_objects/profiles.py", line
>> 1436, in create_profile
>>     bin_fields = data_source._determine_fields(bin_fields)
>>   File
>> "/home/mateuszr/my_yt/yt-x86_64/src/yt-hg/yt/data_objects/data_containers.py",
>> line 552, in _determine_fields
>>     finfo = self.ds._get_field_info(ftype, fname)
>> ReferenceError: weakly-referenced object no longer exists
>>
>> ---------------------------------------------------
>> I am using the following script:
>>
>> import yt
>>
>> profiles = []
>> labels   = []
>>
>> for i in range(0,2,1):
>>
>>    print i
>>    ds=yt.load("./sedov_hdf5_chk_%04i"%i)
>>    my_data = ds.sphere(ds.domain_center, 1.0)
>>    sim_time = ds.current_time
>>    profiles.append(yt.create_profile(my_data, "radius",
>> fields=["density"], weight_field="cell_volume", n_bins=32))
>>    labels.append("t= %.0f" % sim_time)
>>
>> plot = yt.ProfilePlot.from_profiles(profiles, labels=labels)
>> plot.set_xlim([0.1, 1.0])
>> plot.save()
>>
>> ------------------------------------------------------
>> I am using the following yt version:
>>
>> Version = 3.3-dev
>> Changeset = 603eab147248 (yt) tip
>>
>>
>> -------------------------------------------------------
>>
>> Data = standard Flash Sedov test.
>>
>>
>> Any idea what I may be doing wrong?
>>
>>     Thanks,
>>       Mateusz
>>
>>
>>
>>
>>
>>
>>
>>
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>
>
>
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