Hi YT,

I have a function that loads a pf from a Gadget data set, and then smooths a few physical quantities (gas metallicity; mass; density) onto an octree, and then returns them:

http://paste.yt-project.org/show/4624/

in an older version of yt (3.0) that I'm using: 7cf523a36d10 (yt-3.0)

this works, no problem.  if I run yt-update, to get to:  4d1488b8fa47

this gives the following traceback copied below.  Has something important changed that should affect the way I use smoothing functions?

-desika




  File "/Users/desika/Dropbox/powderday/particle_smooth_yt.py", line 41, in yt_smooth
    saved["metallicity"] = ad["gas", "metallicity"]
  File "/Users/desika/yt-x86_64/src/yt-hg/yt/data_objects/data_containers.py", line 214, in __getitem__
    self.get_data(f)
  File "/Users/desika/yt-x86_64/src/yt-hg/yt/data_objects/data_containers.py", line 623, in get_data
    self._generate_fields(fields_to_generate)
  File "/Users/desika/yt-x86_64/src/yt-hg/yt/data_objects/data_containers.py", line 640, in _generate_fields
    fd = self._generate_field(field)
  File "/Users/desika/yt-x86_64/src/yt-hg/yt/data_objects/data_containers.py", line 251, in _generate_field
    tr = self._generate_fluid_field(field)
  File "/Users/desika/yt-x86_64/src/yt-hg/yt/data_objects/data_containers.py", line 271, in _generate_fluid_field
    rv = finfo(gen_obj)
  File "/Users/desika/yt-x86_64/src/yt-hg/yt/fields/derived_field.py", line 178, in __call__
    dd = self._function(self, data)
  File "/Users/desika/yt-x86_64/src/yt-hg/yt/fields/fluid_fields.py", line 153, in _metallicity
    tr = data[ftype, "metal_density"] / data[ftype, "density"]
  File "/Users/desika/yt-x86_64/src/yt-hg/yt/data_objects/data_containers.py", line 207, in __getitem__
    f = self._determine_fields([key])[0]
  File "/Users/desika/yt-x86_64/src/yt-hg/yt/data_objects/data_containers.py", line 455, in _determine_fields
    finfo = self.pf._get_field_info(ftype, fname)
  File "/Users/desika/yt-x86_64/src/yt-hg/yt/data_objects/static_output.py", line 487, in _get_field_info
    raise YTFieldNotFound((ftype, fname), self)
yt.utilities.exceptions.YTFieldNotFound: Could not find field '('gas', 'metal_density')' in snapshot_006.