yt.frontends.stream.fields module

class yt.frontends.stream.fields.StreamFieldInfo(ds, field_list: list[tuple[str, str]], slice_info=None)

Bases: FieldInfoContainer

add_deprecated_field(name, function, sampling_type, since, removal=None, ret_name=None, **kwargs)

Add a new field which is deprecated, along with supplemental metadata, to the list of available fields. This respects a number of arguments, all of which are passed on to the constructor for DerivedField.

Parameters:

• name (str) – is the name of the field.

• function (callable) – A function handle that defines the field. Should accept arguments (field, data)

• sampling_type (str) – “cell” or “particle” or “local”

• since (str) – The version string marking when this field was deprecated.

• removal (str) – The version string marking when this field will be removed.

• ret_name (str) – The name of the field which will actually be returned, used only by alias().

• units (str) – A plain text string encoding the unit. Powers must be in python syntax (** instead of ^). If set to “auto” the units will be inferred from the return value of the field function.

• take_log (bool) – Describes whether the field should be logged

• validators (list) – A list of FieldValidator objects

• vector_field (bool) – Describes the dimensionality of the field. Currently unused.

• display_name (str) – A name used in the plots

add_field(name: tuple[str, str], function: Callable, sampling_type: str, *, alias: DerivedField | None = None, force_override: bool = False, **kwargs) → None

Add a new field, along with supplemental metadata, to the list of available fields. This respects a number of arguments, all of which are passed on to the constructor for DerivedField.

Parameters:

• name (tuple[str, str]) – field (or particle) type, field name

• function (callable) – A function handle that defines the field. Should accept arguments (field, data)

• sampling_type (str) – “cell” or “particle” or “local”

• force_override (bool) – If False (default), an error will be raised if a field of the same name already exists.

• alias (DerivedField (optional):) – existing field to be aliased

• units (str) – A plain text string encoding the unit. Powers must be in python syntax (** instead of ^). If set to “auto” the units will be inferred from the return value of the field function.

• take_log (bool) – Describes whether the field should be logged

• validators (list) – A list of FieldValidator objects

• vector_field (bool) – Describes the dimensionality of the field. Currently unused.

• display_name (str) – A name used in the plots

add_output_field(name, sampling_type, **kwargs)

alias(alias_name: tuple[str, str], original_name: tuple[str, str], units: str | None = None, deprecate: tuple[str, str | None] | None = None)

Alias one field to another field.

Parameters:

• alias_name (tuple[str, str]) – The new field name.

• original_name (tuple[str, str]) – The field to be aliased.

• units (str) – A plain text string encoding the unit. Powers must be in python syntax (** instead of ^). If set to “auto” the units will be inferred from the return value of the field function.

• deprecate (tuple[str, str | None] | None) – If this is set, then the tuple contains two string version numbers: the first marking the version when the field was deprecated, and the second marking when the field will be removed.

check_derived_fields(fields_to_check=None)

clear() → None.  Remove all items from D.

copy()

classmethod create_with_fallback(fallback, name='')

property curvilinear: bool

extra_union_fields: tuple[FieldKey, ...] = ()

fallback = None

find_dependencies(loaded)

classmethod fromkeys(iterable, value=None)

get(k[, d]) → D[k] if k in D, else d.  d defaults to None.

get_aliases_gallery() → list[str]

has_key(key)

items() → a set-like object providing a view on D's items

keys() → a set-like object providing a view on D's keys

known_other_fields: tuple[tuple[str, tuple[str, list[str], str | None]], ...] = (('density', ('code_mass/code_length**3', ['density'], None)), ('dark_matter_density', ('code_mass/code_length**3', ['dark_matter_density'], None)), ('number_density', ('1/code_length**3', ['number_density'], None)), ('pressure', ('dyne/code_length**2', ['pressure'], None)), ('specific_thermal_energy', ('erg / g', ['specific_thermal_energy'], None)), ('temperature', ('K', ['temperature'], None)), ('velocity_x', ('code_length/code_time', ['velocity_x'], None)), ('velocity_y', ('code_length/code_time', ['velocity_y'], None)), ('velocity_z', ('code_length/code_time', ['velocity_z'], None)), ('magnetic_field_x', ('gauss', [], None)), ('magnetic_field_y', ('gauss', [], None)), ('magnetic_field_z', ('gauss', [], None)), ('velocity_r', ('code_length/code_time', ['velocity_r'], None)), ('velocity_theta', ('code_length/code_time', ['velocity_theta'], None)), ('velocity_phi', ('code_length/code_time', ['velocity_phi'], None)), ('magnetic_field_r', ('gauss', [], None)), ('magnetic_field_theta', ('gauss', [], None)), ('magnetic_field_phi', ('gauss', [], None)), ('radiation_acceleration_x', ('code_length/code_time**2', ['radiation_acceleration_x'], None)), ('radiation_acceleration_y', ('code_length/code_time**2', ['radiation_acceleration_y'], None)), ('radiation_acceleration_z', ('code_length/code_time**2', ['radiation_acceleration_z'], None)), ('metallicity', ('Zsun', ['metallicity'], None)), ('metal_density', ('code_mass/code_length**3', ['metal_density'], None)), ('hi_density', ('code_mass/code_length**3', ['hi_density'], None)), ('hii_density', ('code_mass/code_length**3', ['hii_density'], None)), ('h2i_density', ('code_mass/code_length**3', ['h2i_density'], None)), ('h2ii_density', ('code_mass/code_length**3', ['h2ii_density'], None)), ('h2m_density', ('code_mass/code_length**3', ['h2m_density'], None)), ('hei_density', ('code_mass/code_length**3', ['hei_density'], None)), ('heii_density', ('code_mass/code_length**3', ['heii_density'], None)), ('heiii_density', ('code_mass/code_length**3', ['heiii_density'], None)), ('hdi_density', ('code_mass/code_length**3', ['hdi_density'], None)), ('di_density', ('code_mass/code_length**3', ['di_density'], None)), ('dii_density', ('code_mass/code_length**3', ['dii_density'], None)))

known_particle_fields: tuple[tuple[str, tuple[str, list[str], str | None]], ...] = (('particle_position', ('code_length', ['particle_position'], None)), ('particle_position_x', ('code_length', ['particle_position_x'], None)), ('particle_position_y', ('code_length', ['particle_position_y'], None)), ('particle_position_z', ('code_length', ['particle_position_z'], None)), ('particle_velocity', ('code_length/code_time', ['particle_velocity'], None)), ('particle_velocity_x', ('code_length/code_time', ['particle_velocity_x'], None)), ('particle_velocity_y', ('code_length/code_time', ['particle_velocity_y'], None)), ('particle_velocity_z', ('code_length/code_time', ['particle_velocity_z'], None)), ('particle_index', ('', ['particle_index'], None)), ('particle_gas_density', ('code_mass/code_length**3', ['particle_gas_density'], None)), ('particle_gas_temperature', ('K', ['particle_gas_temperature'], None)), ('particle_mass', ('code_mass', ['particle_mass'], None)), ('smoothing_length', ('code_length', ['smoothing_length'], None)), ('density', ('code_mass/code_length**3', ['density'], None)), ('temperature', ('code_temperature', ['temperature'], None)), ('creation_time', ('code_time', ['creation_time'], None)), ('age', ('code_time', [], None)))

load_all_plugins(ftype: str | None = 'gas') → None

load_plugin(plugin_name: str, ftype: str = 'gas', skip_check: bool = False)

pop(k[, d]) → v, remove specified key and return the corresponding value.

If key is not found, d is returned if given, otherwise KeyError is raised.

popitem() → (k, v), remove and return some (key, value) pair

as a 2-tuple; but raise KeyError if D is empty.

setdefault(k[, d]) → D.get(k,d), also set D[k]=d if k not in D

setup_extra_union_fields(ptype='all')

setup_fluid_aliases(ftype: str = 'gas') → None

setup_fluid_fields()

setup_fluid_index_fields()

setup_particle_fields(ptype, ftype='gas', num_neighbors=64)

setup_smoothed_fields(ptype, num_neighbors=64, ftype='gas')

update([E, ]**F) → None.  Update D from mapping/iterable E and F.

If E present and has a .keys() method, does: for k in E: D[k] = E[k] If E present and lacks .keys() method, does: for (k, v) in E: D[k] = v In either case, this is followed by: for k, v in F.items(): D[k] = v

values() → an object providing a view on D's values