ak.contents.RecordArray ======================= Defined in `awkward.contents.recordarray `__ on `line 114 `__. .. py:class:: ak.contents.RecordArray(contents: collections.abc.Iterable[awkward.contents.content.Content], fields: collections.abc.Iterable[str] | None, length: int | type[awkward._nplikes.shape.unknown_length] | None = None, length_generator: awkward._typing.Callable[[], awkward._nplikes.shape.ShapeItem] | None = None, *, parameters=None, backend=None) RecordArray represents an array of tuples or records, all with the same type. Its ``contents`` is an ordered list of arrays. * If ``fields`` is None, the data are tuples, indexed only by their order. * Otherwise, ``fields`` is an ordered list of names with the same length as the ``contents``, associating a field name to every content. The length of the RecordArray, if not given, is the length of its shortest content; all are aligned element-by-element. If a RecordArray has zero contents, it may still represent a non-empty array. In that case, its length is specified by a ``length`` parameter. RecordArrays correspond to Apache Arrow's `struct type `__. To illustrate how the constructor arguments are interpreted, the following is a simplified implementation of ``__init__``, ``__len__``, and ``__getitem__``:: class RecordArray(Content): def __init__(self, contents, fields, length): assert isinstance(contents, list) assert isinstance(length, int) for x in contents: assert isinstance(x, Content) assert len(x) >= length assert fields is None or isinstance(fields, list) if isinstance(fields, list): assert len(fields) == len(contents) for x in fields: assert isinstance(x, str) self.contents = contents self.fields = fields self.length = length def __len__(self): return self.length def __getitem__(self, where): if isinstance(where, int): if where < 0: where += len(self) assert 0 <= where < len(self) record = [x[where] for x in self.contents] if self.fields is None: return tuple(record) else: return dict(zip(self.fields, record)) elif isinstance(where, slice) and where.step is None: if len(self.contents) == 0: start = min(max(where.start, 0), self.length) stop = min(max(where.stop, 0), self.length) if stop < start: stop = start return RecordArray([], self.fields, stop - start) else: return RecordArray( [x[where] for x in self.contents], self.fields, where.stop - where.start, ) elif isinstance(where, str): if self.fields is None: try: i = int(where) except ValueError: pass else: if i < len(self.contents): return self.contents[i][0 : len(self)] else: try: i = self.fields.index(where) except ValueError: pass else: return self.contents[i][0 : len(self)] raise ValueError("field " + repr(where) + " not found") else: raise AssertionError(where) .. py:attribute:: _contents .. py:attribute:: _fields .. py:attribute:: _length :value: None .. py:attribute:: _length_generator :value: None .. py:attribute:: form_cls :type: awkward._typing.Final .. py:method:: copy(contents=UNSET, fields=UNSET, length=UNSET, length_generator=UNSET, *, parameters=UNSET, backend=UNSET) .. py:method:: __copy__() .. py:method:: __deepcopy__(memo) .. py:method:: __getstate__() .. py:method:: simplified(contents, fields, length=None, length_generator=None, *, parameters=None, backend=None) :classmethod: .. py:method:: to_tuple() -> awkward._typing.Self .. py:method:: _form_with_key(getkey: awkward._typing.Callable[[awkward.contents.content.Content], str | None]) -> awkward.forms.recordform.RecordForm .. py:method:: _form_with_key_path(path: awkward.forms.form.FormKeyPathT) -> awkward.forms.recordform.RecordForm .. py:method:: _to_buffers(form: awkward.forms.form.Form, getkey: awkward._typing.Callable[[awkward.contents.content.Content, awkward.forms.form.Form, str], str], container: collections.abc.MutableMapping[str, awkward._nplikes.array_like.ArrayLike], backend: awkward._backends.backend.Backend, byteorder: str) .. py:method:: _to_typetracer(forget_length: bool) -> awkward._typing.Self .. py:method:: _touch_data(recursive: bool) .. py:method:: _touch_shape(recursive: bool) .. py:property:: length :type: awkward._nplikes.shape.ShapeItem .. py:method:: __repr__() .. py:method:: _repr(indent, pre, post) .. py:method:: content(index_or_field: str | awkward._typing.SupportsIndex) -> awkward.contents.content.Content .. py:method:: maybe_content(index_or_field) -> awkward.contents.content.Content .. py:method:: _getitem_nothing() -> awkward.contents.content.Content .. py:method:: _is_getitem_at_placeholder() -> bool .. py:method:: _is_getitem_at_virtual() -> bool .. py:method:: _getitem_at(where: awkward._nplikes.numpy_like.IndexType) .. py:method:: _getitem_range(start: awkward._nplikes.numpy_like.IndexType, stop: awkward._nplikes.numpy_like.IndexType) -> awkward.contents.content.Content .. py:method:: _getitem_field(where: str | awkward._typing.SupportsIndex, only_fields: tuple[str, Ellipsis] = ()) -> awkward.contents.content.Content .. py:method:: _getitem_fields(where: list[str | awkward._typing.SupportsIndex], only_fields: tuple[str, Ellipsis] = ()) -> awkward.contents.content.Content .. py:method:: _carry(carry: awkward.index.Index, allow_lazy: bool) -> awkward.contents.content.Content .. py:method:: _getitem_next_jagged(slicestarts: awkward.index.Index, slicestops: awkward.index.Index, slicecontent: awkward.contents.content.Content, tail) -> awkward.contents.content.Content .. py:method:: _getitem_next(head: awkward._slicing.SliceItem | tuple, tail: tuple[awkward._slicing.SliceItem, Ellipsis], advanced: awkward.index.Index | None) -> awkward.contents.content.Content .. py:method:: _offsets_and_flattened(axis: int, depth: int) -> tuple[awkward.index.Index, awkward.contents.content.Content] .. py:method:: _mergeable_next(other: awkward.contents.content.Content, mergebool: bool, mergecastable: awkward._typing.Literal[same_kind, equiv, family]) -> bool .. py:method:: _mergemany(others: collections.abc.Sequence[awkward.contents.content.Content]) -> awkward.contents.content.Content .. py:method:: _fill_none(value: awkward.contents.content.Content) -> awkward.contents.content.Content .. py:method:: _local_index(axis, depth) .. py:method:: _numbers_to_type(name, including_unknown) .. py:method:: _is_unique(negaxis, starts, parents, offsets, outlength) .. py:method:: _unique(negaxis, starts, parents, offsets, outlength) :abstractmethod: .. py:method:: _argsort_next(negaxis, starts, shifts, parents, offsets, outlength, ascending, stable) :abstractmethod: .. py:method:: _sort_next(negaxis, starts, parents, offsets, outlength, ascending, stable) .. py:method:: _combinations(n, replacement, recordlookup, parameters, axis, depth) .. py:method:: _reduce_next(reducer, negaxis, starts, shifts, parents, offsets, outlength, mask, keepdims, behavior) .. py:method:: _validity_error(path) .. py:method:: _nbytes_part() .. py:method:: _pad_none(target, axis, depth, clip) .. py:method:: _to_arrow(pyarrow: awkward._typing.Any, mask_node: awkward.contents.content.Content | None, validbytes: awkward.contents.content.Content | None, length: int, options: awkward.contents.content.ToArrowOptions) .. py:method:: _to_cudf(cudf: awkward._typing.Any, mask: awkward.contents.content.Content | None, length: int) .. py:method:: _to_backend_array(allow_missing, backend) .. py:method:: _remove_structure(backend: awkward._backends.backend.Backend, options: awkward.contents.content.RemoveStructureOptions) -> list[awkward.contents.content.Content] .. py:method:: _recursively_apply(action: awkward.contents.content.ImplementsApplyAction, depth: int, depth_context: collections.abc.Mapping[str, awkward._typing.Any] | None, lateral_context: collections.abc.Mapping[str, awkward._typing.Any] | None, options: awkward.contents.content.ApplyActionOptions) -> awkward.contents.content.Content | None .. py:method:: _to_packed(recursive: bool = True) -> awkward._typing.Self .. py:method:: _to_list(behavior, json_conversions) .. py:method:: _to_backend(backend: awkward._backends.backend.Backend) -> awkward._typing.Self .. py:method:: _materialize(type_) -> awkward._typing.Self .. py:property:: _is_all_materialized :type: bool .. py:property:: _is_any_materialized :type: bool .. py:method:: _is_equal_to(other: awkward._typing.Self, index_dtype: bool, numpyarray: bool, all_parameters: bool) -> bool