[yt-dev] Hop in yt-3

[Nathan Goldbaum]

Hey Brian,

Sorry for the trouble - this is due to a recent change to make YTArray
subclasses behave more naturally.

I've managed to reproduce this locally using the following script:

http://paste.yt-project.org/show/4684/

I will hopefully have a PR for you to test soon.

-Nathan


On Mon, May 26, 2014 at 6:22 PM, Brian O'Shea <bwoshea at gmail.com> wrote:

> Hi folks,
>
> I just tried to do some halo-finding with yt-3 using Hop (the current tip;
> rev 3cfb38afe34d), and it died somewhere after calling 'regroup' with this
> error:
>
> Traceback (most recent call last):
>   File "hop.py", line 11, in <module>
>     halo_list = HaloFinder(pf, subvolume=my_subregion)
>   File "/mnt/a/u/sciteam/bwoshea/yt-3.0/src/yt-hg/yt/analysis_modules/halo_finding/halo_objects.py", line 2440, in __init__
>     self._join_halolists()
>   File "/mnt/a/u/sciteam/bwoshea/yt-3.0/src/yt-hg/yt/analysis_modules/halo_finding/halo_objects.py", line 1889, in _join_halolists
>     self._groups.sort(haloCmp)
>   File "/mnt/a/u/sciteam/bwoshea/yt-3.0/src/yt-hg/yt/analysis_modules/halo_finding/halo_objects.py", line 1888, in haloCmp
>     return cmp(h1.center_of_mass()[0], h2.center_of_mass()[0])
>   File "/mnt/a/u/sciteam/bwoshea/yt-3.0/src/yt-hg/yt/utilities/parallel_tools/parallel_analysis_interface.py", line 191, in single_proc_results
>     retval = func(self, *args, **kwargs)
>   File "/mnt/a/u/sciteam/bwoshea/yt-3.0/src/yt-hg/yt/analysis_modules/halo_finding/halo_objects.py", line 158, in center_of_mass
>     c = (com * pm).sum(axis=1) / pm.sum()
>   File "/mnt/a/u/sciteam/bwoshea/yt-3.0/src/yt-hg/yt/units/yt_array.py", line 648, in __rmul__
>     return YTArray(super(YTArray, self).__rmul__(lo))
>   File "/mnt/a/u/sciteam/bwoshea/yt-3.0/src/yt-hg/yt/units/yt_array.py", line 910, in __array_wrap__
>     ret_class = get_binary_op_return_class(cls1, cls2)
>   File "/mnt/a/u/sciteam/bwoshea/yt-3.0/src/yt-hg/yt/units/yt_array.py", line 1045, in get_binary_op_return_class
>     raise RuntimeError("Operations are only defined on pairs of objects"
> RuntimeError: Operations are only defined on pairs of objectsin which one is a subclass of the other
>
>
> It was functional roughly two weeks ago (on May 10), when I successfully
> did halo-finding on the same machine with yt-3.  Looking at the errors, it
> seems to be something more general than Hop functionality, but I'm not
> entirely sure.  Does anybody have any thoughts on this?
>
> Also, for the sake of completeness, you can see my batch and python
> scripts:
>
>   http://paste.yt-project.org/show/4681/
>    http://paste.yt-project.org/show/4682/
>
> And the full output log from the run:
>
>   http://paste.yt-project.org/show/4683/
>
> And, again, this is using the current tip of yt-3.
>
> Thanks!
>
> --Brian
>
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>
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