Struct PyScalar 

pub struct PyScalar { /* private fields */ }

A Python-facing Arrow scalar

Implementations

impl PyScalar

pub unsafe fn new_unchecked(array: ArrayRef, field: FieldRef) -> Self

Create a new PyScalar without any checks

Safety

• The array’s DataType must match the field’s DataType
• The array must have length 1

pub fn try_from_array_ref(array: ArrayRef) -> PyArrowResult<Self>

Create a new PyArray from an ArrayRef, inferring its data type automatically.

pub fn try_new(array: ArrayRef, field: FieldRef) -> PyArrowResult<Self>

Create a new PyScalar

This will error if the arrays’ data type does not match the field’s data type or if the length of the array is not 1.

pub fn try_from_arrow_pycapsule( schema_capsule: &Bound<'_, PyCapsule>, array_capsule: &Bound<'_, PyCapsule>, ) -> PyArrowResult<Self>

Import from raw Arrow capsules

pub fn array(&self) -> &ArrayRef

Access the underlying ArrayRef.

pub fn field(&self) -> &FieldRef

Access the underlying FieldRef.

pub fn into_inner(self) -> (ArrayRef, FieldRef)

Consume self to access the underlying ArrayRef and FieldRef.

pub fn to_arro3<'py>(&'py self, py: Python<'py>) -> PyResult<Bound<'py, PyAny>>

Export to an arro3.core.Scalar.

This requires that you depend on arro3-core from your Python package.

pub fn into_arro3(self, py: Python<'_>) -> PyResult<Bound<'_, PyAny>>

Export to an arro3.core.Scalar.

This requires that you depend on arro3-core from your Python package.

Trait Implementations

impl Datum for PyScalar

fn get(&self) -> (&dyn Array, bool)

Returns the value for this Datum and a boolean indicating if the value is scalar

impl Debug for PyScalar

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for PyScalar

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl From<PyScalar> for Arro3Scalar

fn from(value: PyScalar) -> Self

Converts to this type from the input type.

impl<'a> FromPyObject<'a> for PyScalar

fn extract_bound(ob: &Bound<'a, PyAny>) -> PyResult<Self>

Extracts Self from the bound smart pointer obj.

impl<'py> IntoPyObject<'py> for PyScalar

type Target = PyScalar

The Python output type

type Output = Bound<'py, <PyScalar as IntoPyObject<'py>>::Target>

The smart pointer type to use.

type Error = PyErr

The type returned in the event of a conversion error.

fn into_pyobject( self, py: Python<'py>, ) -> Result<<Self as IntoPyObject<'_>>::Output, <Self as IntoPyObject<'_>>::Error>

Performs the conversion.

impl PyClass for PyScalar

type Frozen = True

Whether the pyclass is frozen.

impl PyClassBaseType for PyScalar

type LayoutAsBase = PyClassObject<PyScalar>

type BaseNativeType = <PyScalar as PyClassImpl>::BaseNativeType

type Initializer = PyClassInitializer<PyScalar>

type PyClassMutability = <PyScalar as PyClassImpl>::PyClassMutability

impl PyClassImpl for PyScalar

const IS_BASETYPE: bool = true

#[pyclass(subclass)]

const IS_SUBCLASS: bool = false

#[pyclass(extends=…)]

const IS_MAPPING: bool = false

#[pyclass(mapping)]

const IS_SEQUENCE: bool = false

#[pyclass(sequence)]

const IS_IMMUTABLE_TYPE: bool = false

#[pyclass(immutable_type)]

const RAW_DOC: &'static CStr = /// A Python-facing Arrow scalar

Docstring for the class provided on the struct or enum.

const DOC: &'static CStr

Fully rendered class doc, including the text_signature if a constructor is defined.

type BaseType = PyAny

Base class

type ThreadChecker = SendablePyClass<PyScalar>

This handles following two situations:

type PyClassMutability = <<PyAny as PyClassBaseType>::PyClassMutability as PyClassMutability>::ImmutableChild

Immutable or mutable

type Dict = PyClassDummySlot

Specify this class has #[pyclass(dict)] or not.

type WeakRef = PyClassDummySlot

Specify this class has #[pyclass(weakref)] or not.

type BaseNativeType = PyAny

The closest native ancestor. This is PyAny by default, and when you declare #[pyclass(extends=PyDict)], it’s PyDict.

fn items_iter() -> PyClassItemsIter

fn lazy_type_object() -> &'static LazyTypeObject<Self>

fn dict_offset() -> Option<isize>

fn weaklist_offset() -> Option<isize>

impl PyClassNewTextSignature for PyScalar

const TEXT_SIGNATURE: &'static str = "(obj, /, type=...)"

impl PyClass__eq__SlotFragment<PyScalar> for PyClassImplCollector<PyScalar>

unsafe fn __eq__( self, py: Python<'_>, _raw_slf: *mut PyObject, arg0: *mut PyObject, ) -> PyResult<*mut PyObject>

Safety: _slf and _other must be valid non-null Python objects

impl<'a, 'holder, 'py> PyFunctionArgument<'a, 'holder, 'py, false> for &'holder PyScalar

type Holder = Option<PyClassGuard<'a, PyScalar>>

fn extract( obj: &'a Bound<'py, PyAny>, holder: &'holder mut Self::Holder, ) -> PyResult<Self>

impl PyMethods<PyScalar> for PyClassImplCollector<PyScalar>

fn py_methods(self) -> &'static PyClassItems

impl PyTypeInfo for PyScalar

const NAME: &'static str = "Scalar"

Class name.

const MODULE: Option<&'static str>

Module name, if any.

fn type_object_raw(py: Python<'_>) -> *mut PyTypeObject

Returns the PyTypeObject instance for this type.

fn type_object(py: Python<'_>) -> Bound<'_, PyType>

Returns the safe abstraction over the type object.

fn is_type_of(object: &Bound<'_, PyAny>) -> bool

Checks if object is an instance of this type or a subclass of this type.

fn is_exact_type_of(object: &Bound<'_, PyAny>) -> bool

Checks if object is an instance of this type.

impl DerefToPyAny for PyScalar