[yt-users] parallel quantities

[Matthew Turk]

Hi Dave,

Usually this means that it's not getting a field -- sorry for the
obtuse error message.  What happens if you try specifying
preload=False, or if you query MagneticEnergy directly?

-Matt

On Tue, Jul 23, 2013 at 1:58 PM, David Collins <dcollins4096 at gmail.com> wrote:
> Hi, all--
>
> I have an odd error trying to get some averaged quantities in parallel.  I'm
> trying to do
>
> pf.h.all_data().quantities['WeightedAverageQuantity']('MagneticEnergy','CellVolume')
>
> on two processors, and I get the following error:
>
> File
> "/nics/b/home/collins/local_2013_03_12/src/yt-hg/yt/data_objects/field_info_container.py",
> line 396, in __call__
> dd *= self._convert_function(data)
> TypeError: unsupported operand type(s) for *=: 'NoneType' and 'int'
>
> It works fine in serial, and it works fine if I use "VelocityMagnitude"
> instead of "MagneticEnergy"
>
> Does anyone have an idea about what I'm doing wrong?
>
> I run it as
>> mpirun -np 2 python p23_go.py --parallel
>
> and the full trace back is:
>
> Traceback (most recent call last):
>   File "ptmp.py", line 5, in <module>
>     bavg =
> ad.quantities['WeightedAverageQuantity']('MagneticEnergy','CellVolume')
>   File
> "/nics/b/home/collins/local_2013_03_12/src/yt-hg/yt/data_objects/derived_quantities.py",
> line 87, in __call__
> Traceback (most recent call last):
>   File "ptmp.py", line 5, in <module>
>     bavg =
> ad.quantities['WeightedAverageQuantity']('MagneticEnergy','CellVolume')
>   File
> "/nics/b/home/collins/local_2013_03_12/src/yt-hg/yt/data_objects/derived_quantities.py",
> line 87, in __call__
>     self.func(e, *args, **kwargs)
>     self.func(e, *args, **kwargs)
>   File
> "/nics/b/home/collins/local_2013_03_12/src/yt-hg/yt/data_objects/derived_quantities.py",
> line 203, in _WeightedAverageQuantity
>   File
> "/nics/b/home/collins/local_2013_03_12/src/yt-hg/yt/data_objects/derived_quantities.py",
> line 203, in _WeightedAverageQuantity
>     num = (data[field] * data[weight]).sum()
>   File
> "/nics/b/home/collins/local_2013_03_12/src/yt-hg/yt/data_objects/field_info_container.py",
> line 257, in __missing__
>     num = (data[field] * data[weight]).sum()
>   File
> "/nics/b/home/collins/local_2013_03_12/src/yt-hg/yt/data_objects/field_info_container.py",
> line 257, in __missing__
>     vv = FI[item](self)
>     vv = FI[item](self)
>   File
> "/nics/b/home/collins/local_2013_03_12/src/yt-hg/yt/data_objects/field_info_container.py",
> line 395, in __call__
>   File
> "/nics/b/home/collins/local_2013_03_12/src/yt-hg/yt/data_objects/field_info_container.py",
> line 395, in __call__
>     dd = self._function(self, data)
>   File
> "/nics/b/home/collins/local_2013_03_12/src/yt-hg/yt/data_objects/universal_fields.py",
> line 1016, in _MagneticEnergy
>     dd = self._function(self, data)
>   File
> "/nics/b/home/collins/local_2013_03_12/src/yt-hg/yt/data_objects/universal_fields.py",
> line 1016, in _MagneticEnergy
>     return (data["Bx"]**2 + data["By"]**2 + data["Bz"]**2)/(8*np.pi)
>     return (data["Bx"]**2 + data["By"]**2 + data["Bz"]**2)/(8*np.pi)
>   File
> "/nics/b/home/collins/local_2013_03_12/src/yt-hg/yt/data_objects/field_info_container.py",
> line 257, in __missing__
>   File
> "/nics/b/home/collins/local_2013_03_12/src/yt-hg/yt/data_objects/field_info_container.py",
> line 257, in __missing__
>     vv = FI[item](self)
>   File
> "/nics/b/home/collins/local_2013_03_12/src/yt-hg/yt/data_objects/field_info_container.py",
> line 396, in __call__
>     vv = FI[item](self)
>   File
> "/nics/b/home/collins/local_2013_03_12/src/yt-hg/yt/data_objects/field_info_container.py",
> line 396, in __call__
>     dd *= self._convert_function(data)
> TypeError: unsupported operand type(s) for *=: 'NoneType' and 'int'
>     dd *= self._convert_function(data)
> TypeError: unsupported operand type(s) for *=: 'NoneType' and 'int'
>
> Thanks a ton!
>
>
> --
> -- Sent from a computer.
>
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