[yt-dev] Issue #824: Field detection issue when recreating data objects (yt_analysis/yt)

Nathan Goldbaum issues-reply at bitbucket.org
Tue Apr 1 16:55:08 PDT 2014


New issue 824: Field detection issue when recreating data objects
https://bitbucket.org/yt_analysis/yt/issue/824/field-detection-issue-when-recreating-data

Nathan Goldbaum:

I ran into this when using a notebook.  I found that when I re-ran a cell that creates a data object and then calculates a derived quantity, I get a field detection error the *second* time I run the cell.

The following script exposes the buggy behavior: http://paste.yt-project.org/show/4462/

When run using the current experimental bookmark I get the following output and traceback:


```
goldbaum at ROUS in ~
○ python test.py
[8.15217983473e+49 g, 0.833333333333 code_mass]
Traceback (most recent call last):
  File "test.py", line 21, in <module>
    print ad.quantities.total_mass()
  File "/Users/goldbaum/Documents/yt-hg/yt/data_objects/derived_quantities.py", line 194, in __call__
    rv = super(TotalMass, self).__call__(fields)
  File "/Users/goldbaum/Documents/yt-hg/yt/data_objects/derived_quantities.py", line 163, in __call__
    rv = super(TotalQuantity, self).__call__(fields)
  File "/Users/goldbaum/Documents/yt-hg/yt/data_objects/derived_quantities.py", line 59, in __call__
    sto.result = self.process_chunk(ds, *args, **kwargs)
  File "/Users/goldbaum/Documents/yt-hg/yt/data_objects/derived_quantities.py", line 169, in process_chunk
    for field in fields]
  File "/Users/goldbaum/Documents/yt-hg/yt/data_objects/data_containers.py", line 205, in __getitem__
    f = self._determine_fields([key])[0]
  File "/Users/goldbaum/Documents/yt-hg/yt/data_objects/data_containers.py", line 464, in _determine_fields
    raise YTFieldTypeNotFound(ftype)
yt.utilities.exceptions.YTFieldTypeNotFound: Could not find field 'all'.
```






More information about the yt-dev mailing list