[yt-users] Pickle vs. _type_name

[David Collins]

Groovy.  I've issued a pr for this.

Thanks!

d.


On Mon, Jun 17, 2013 at 12:38 PM, Nathan Goldbaum <nathan12343 at gmail.com>wrote:

> I think it actually has to be
>
>  _con_args = ("_base_region", "_field_cuts")
>
>
> On Mon, Jun 17, 2013 at 11:35 AM, david collins <dcollins4096 at gmail.com>wrote:
>
>> Thanks for the suggestion, Matt.
>>
>> I'm still getting an error-- I added the following to data_containers.py:
>>
>> <code>
>> class InLineExtractedRegionBase(AMR3DData):
>>     """    In-line extracted regions accept a base region and a set of
>> field_cuts to
>>     determine which points in a grid should be included.
>>     """
>>     _con_args = ("base_region", "field_cuts")
>>     _type_name = "cut_region"
>> </code>
>>
>> and now I get the error
>>
>> AttributeError: 'InLineExtractedRegionBase' object has no attribute
>> 'base_region'
>>
>>   File "/nics/b/home/collins/yt2.0/fPickle.py", line 15, in dump
>>     output = cPickle.dump(object,file,*args,**kwargs)
>>   File
>> "/nics/b/home/collins/local_2013_03_12/src/yt-dave-hg-hangnail/yt/data_objects/data_containers.py",
>> line 407, in __reduce__
>>      [getattr(self, n) for n in self._con_args] +
>> AttributeError: 'InLineExtractedRegionBase' object has no attribute
>> 'base_region'
>>
>> Thanks a ton,
>> d.
>>
>>
>>
>> On Mon, Jun 17, 2013 at 11:34 AM, Matthew Turk <matthewturk at gmail.com>wrote:
>>
>>> Hi Dave,
>>>
>>> I think it needs the following items:
>>>
>>> _con_args = ("base_region", "field_cuts")
>>> _type_name = "cut_region"
>>>
>>> in the class definition and I think it should be good to go.
>>>
>>> -Matt
>>>
>>> On Mon, Jun 17, 2013 at 1:32 PM, David Collins <dcollins4096 at gmail.com>
>>> wrote:
>>> > Hi, all--
>>> >
>>> > I'm trying to pickle a dataset I made with cut_region.  This fails on
>>> the
>>> > call to __reduce__ since the cut_region doesn't have a _type_name
>>> attribute.
>>> > Is there an easy way to give _type_names to cut regions in general, or
>>> > should I clone the __reduce__ method for InLineExtractedRegionBase?
>>> >
>>> > I generate the object like this:
>>> >
>>> >>> region = pf.h.region(Center,Left,Right)
>>> >>> cut_region = region.cut_region(['grid[some_field] == some_value'})
>>> >>> file = open(args)
>>> >>> cPickle.dump(cut_region,file)
>>> >
>>> >  which gives the following error:
>>> >
>>> > Traceback (most recent call last):
>>> >   File "<stdin>", line 1, in <module>
>>> >   File "/nics/b/home/collins/yt2.0/fPickle.py", line 15, in dump
>>> >     output = cPickle.dump(object,file,*args,**kwargs)
>>> >   File
>>> >
>>> "/nics/b/home/collins/local_2013_03_12/src/yt-dave/yt/data_objects/data_containers.py",
>>> > line 407, in __reduce__
>>> >     [getattr(self, n) for n in self._con_args] +
>>> > AttributeError: 'InLineExtractedRegionBase' object has no attribute
>>> > '_type_name'
>>> >
>>> >
>>> > Thanks!
>>> > d.
>>> >
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>>
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