polars::series::arrow_export::categorical

Struct CategoricalToArrowConverter

pub struct CategoricalToArrowConverter {
    pub converters: IndexMap<usize, CategoricalArrayToArrowConverter, RandomState>,
    pub persist_remap: bool,
}

Available on crate feature dtype-categorical only.

Expand description

Categorical converter that prunes unused categories.

Fields§

§converters: IndexMap<usize, CategoricalArrayToArrowConverter, RandomState>

Converters keyed by the Arc address of Arc<CategoricalMapping>.

§Safety

The usize key remains valid as CategoricalArrayToArrowConverter holds a ref-count to the Arc<> that the key is derived from.

§persist_remap: bool

Persist the key remap to ensure consistent mapping across multiple calls.

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impl CategoricalToArrowConverter

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pub fn initialize(&mut self, dtype: &DataType)

Initializes categorical converters for all categorical mappings present in this dtype.

Auto Trait Implementations§

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impl !UnwindSafe for CategoricalToArrowConverter

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impl<T> Any for T
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fn borrow_mut(&mut self) -> &mut T

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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided [Span], returning an Instrumented wrapper. Read more

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fn in_current_span(self) -> Instrumented<Self>

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fn into(self) -> U

Calls U::from(self).

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self> ⓘ

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self> ⓘ
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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