Hi all,
Last week I said that today would be the first week of changing the
scheduled time to Mondays at 2 (EST), but looking at the calendar a little
more closely I think we should hold off on switching. We just met a couple
days ago on Thursday, and next Monday we will presumably take off given the
holiday. That would leave us with quite a stretch in between meetings, so
unless there are any strong objections I propose we do a hangout this
Thursday (9/3), skip next Monday (9/7), and then meet again the following
Monday (9/14).
If this is amendable to you all, here's this week's link:
https://plus.google.com/b/107728486871834552760/events/caj83u54mic68etgb9of…
Thanks!
--
Hilary Egan
Astrophysical and Planetary Science Department
University of Colorado Boulder
Hi all,
I'd like to do a stable release soonish. I think it should include what's
on the stable branch right now along with the pull request I issued today.
Does anyone have any pending bugfixes they thing really needs to be in a
3.2.1 release but either hasn't been merged or pull requested yet?
Barring any missing bits, I think a good time to do this would be after the
PR hangout on Thursday.
What do you all think?
-Nathan
New issue 1075: Switch HaloCatalog main loop to loop over io chunks
https://bitbucket.org/yt_analysis/yt/issues/1075/switch-halocatalog-main-lo…
Britton Smith:
The loop over all halos in the HaloCatalog currently requires all processors to have the entire list of halos. This should be changed such that process groups work only on a single io chunk. Currently, only one io chunk exists even when the halo catalog is saved to multiple files. This needs to be reverted to one chunk per file first.
New issue 1074: LaTeX representations of units are not seriailized
https://bitbucket.org/yt_analysis/yt/issues/1074/latex-representations-of-u…
Nathan Goldbaum:
This issue is illustrated by the following example (which needs to happen over the course of two python scripts).
save.py:
```
#!python
import yt
ds = yt.load('enzo_tiny_cosmology/DD0000/DD0000')
data = ds.arr([1,2,3], 'Mpccm')
data.write_hdf5('my_data')
```
load.py:
```
#!python
import yt
yt.YTArray.from_hdf5('my_data')
```
This will crash with the following traceback:
```
#!python
---------------------------------------------------------------------------
KeyError Traceback (most recent call last)
<ipython-input-2-a3d4124ff75c> in <module>()
----> 1 yt.YTArray.from_hdf5('my_data')
/Users/goldbaum/Documents/yt-hg/yt/units/yt_array.pyc in from_hdf5(cls, filename, dataset_name)
706 f.close()
707 registry = UnitRegistry(lut=unit_lut, add_default_symbols=False)
--> 708 return cls(data, units, registry=registry)
709
710 #
/Users/goldbaum/Documents/yt-hg/yt/units/yt_array.pyc in __new__(cls, input_array, input_units, registry, dtype, bypass_validation)
356 # don't handle all the cases here, let the Unit class handle if
357 # it's a str.
--> 358 units = Unit(input_units, registry=registry)
359
360 # Attach the units
/Users/goldbaum/Documents/yt-hg/yt/units/unit_object.pyc in __new__(cls, unit_expr, base_value, base_offset, dimensions, registry, **assumptions)
202 else:
203 # lookup the unit symbols
--> 204 unit_data = _get_unit_data_from_expr(unit_expr, registry.lut)
205 base_value = unit_data[0]
206 dimensions = unit_data[1]
/Users/goldbaum/Documents/yt-hg/yt/units/unit_object.pyc in _get_unit_data_from_expr(unit_expr, unit_symbol_lut)
476 # Now for the sympy possibilities
477 if isinstance(unit_expr, Symbol):
--> 478 return _lookup_unit_symbol(str(unit_expr), unit_symbol_lut)
479
480 if isinstance(unit_expr, Number):
/Users/goldbaum/Documents/yt-hg/yt/units/unit_object.pyc in _lookup_unit_symbol(symbol_str, unit_symbol_lut)
539 sstr = symbol_str
540 latex_symbol_lut[symbol_str] = \
--> 541 latex_symbol_lut[symbol_wo_prefix].replace(
542 '{'+symbol_wo_prefix+'}', '{'+sstr+'}')
543
KeyError: 'pccm'
```
The issue is that the LaTeX version of symbols is saved in a singleton dictionary (`latex_symbol_lut`) which is not persisted between python sessions. Coming units specifically define a special LaTeX represetation, which is not available in the python session for load.py. Annoyingly, it *would* work if load.py were executed in the same python session as save.py, since the singleton dictionary would be populated with the correct values.
I think the correct thing to do is to store the LaTeX representations of units in the `UnitRegistry` object itself rather than in a global singleton.
Responsible: ngoldbaum
New issue 1073: Quickstart notebooks do not work under python3
https://bitbucket.org/yt_analysis/yt/issues/1073/quickstart-notebooks-do-no…
Nathan Goldbaum:
We should write the quickstart notebooks so they work both under python2 and python3 without any modifications. They're mostly there already, just the print statements need to be edited.
In general we should probably have a pass over all of the example code in the documentation to ensure it functions under python3. Maybe the easiest way to get a start on this would be to set up doc builds for python3.
Hi all,
I've opened a pull request to remove the reason GUI here:
https://bitbucket.org/yt_analysis/yt/pull-requests/1719
As I mentioned in my e-mail a couple weeks ago about cleaning up the
codebase, most of the functionality provided by reason is currently
disabled. It could be re-enabled, but someone would need to commit to
maintaining it and go through the work of updating the python side of
things to work with the current state of yt.
If anyone is invested in the reason gui and thinks my pull request is not
the way to go, please feel free to comment on the pull request so we can
start a discussion about what to do.
Thanks for your time,
-Nathan
Hello,
I have uploaded new Arch Linux AUR yt packages for both Python 2 and
Python 3.
https://aur.archlinux.org/packages/python-yt/https://aur.archlinux.org/packages/python2-yt/
For the Python 2 package I have appended a '2' to all the executable
scripts so you can have both Python 2 and Python 3 versions installed
along side one another.
Any feedback and bug reports are welcome.
Sorry it took a while after the 3.2 release, blame my impending release
of Thesis 0.1.
Stuart
