Hey there! I have a relatively extensive plugins file that adds lots of fields.
I changed how one of the fields is calculated, but now I am getting an error
about an undefined variable. I have the following function:
def _get_scalar_func(_ptype, field_name, unit_dict):
def _scalar(_ptype, field, data):
if field_name in only_gas_fields:
_ptype='gas'
return data[_ptype, field_name]
elif 'velocity_los' in field_name and data.ds.head('RAY')==0:
pass
else:
old_data=data[_ptype, field_name]
x_old_units=unyt.unyt_array(old_data.value*unit_dict[field_name][0],
units=unit_dict[field_name][1], registry=data.ds.unit_registry)
return x_old_units.to(unit_dict[field_name][2])
return _scalar
it converts some scalar fields for me based on "unit_dict", which holds what
units I want for each property. It also adds the field ('PartType0',
'entropy'), which is just a copy of ('gas', 'entropy') with the first "if"
statement. However, it says that the variable "_ptype" is referenced before
assignment, and none of my plugins stuff is added. When I try to add a field
manually outside the plugins file like so:
ds.add_field(('PartType0', 'Density_msun_pc3'),
function=_get_scalar_func('PartType0', 'Density', gas_scalar_conversions),
sampling_type='particle', units='Msun/pc**3')
I get the following long error:
Traceback (most recent call last):
File "file_loader_tester.py", line 35, in <module>
new_yt.add_field(('PartType0', 'Density_msun_pc3'),
function=_get_scalar_func('PartType0', 'Density', gas_scalar_conversions),
sampling_type='particle', units='Msun/pc**3')
File
"/home/jacob/.local/lib/python3.8/site-packages/yt/data_objects/static_output.py",
line 1593, in add_field
self.index
File
"/home/jacob/.local/lib/python3.8/site-packages/yt/data_objects/static_output.py",
line 539, in index
self.create_field_info()
File
"/home/jacob/.local/lib/python3.8/site-packages/yt/data_objects/static_output.py",
line 613, in create_field_info
self.field_info.load_all_plugins(self.default_fluid_type)
File
"/home/jacob/.local/lib/python3.8/site-packages/yt/fields/field_info_container.py",
line 402, in load_all_plugins
self.find_dependencies(loaded)
File
"/home/jacob/.local/lib/python3.8/site-packages/yt/fields/field_info_container.py",
line 415, in find_dependencies
deps, unavailable = self.check_derived_fields(loaded)
File
"/home/jacob/.local/lib/python3.8/site-packages/yt/fields/field_info_container.py",
line 612, in check_derived_fields
fd = fi.get_dependencies(ds=self.ds)
File
"/home/jacob/.local/lib/python3.8/site-packages/yt/fields/derived_field.py",
line 253, in get_dependencies
e[self.name]
File
"/home/jacob/.local/lib/python3.8/site-packages/yt/fields/field_detector.py",
line 125, in __missing__
vv = finfo(self)
File
"/home/jacob/.local/lib/python3.8/site-packages/yt/fields/derived_field.py",
line 294, in __call__
dd = self._function(self, data)
File "/home/jacob/.config/yt/my_plugins.py", line 69, in _scalar
old_data=data[_ptype, field_name]
UnboundLocalError: local variable '_ptype' referenced before assignment
This has been working for literally years, and I only made minor changes to the
inner _scalar function recently. But this almost seems like an issue with the
add_field() function, which I don't think I have ever touched. Any ideas?
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