Struct polars_io::parquet::ParquetWriter[−][src]

pub struct ParquetWriter<W> { /* fields omitted */ }

This is supported on crate feature feature only.

Expand description

Write a DataFrame to parquet format

Example

Implementations

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impl<W> ParquetWriter<W> where
W: Write + Seek,

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pub fn new(writer: W) -> Self where
W: Write + Seek,

Create a new writer

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pub fn with_compression(self, compression: Compression) -> Self

Set the compression used. Defaults to Snappy.

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pub fn finish(self, df: &DataFrame) -> Result<()>

Write the given DataFrame in the the writer W.

Auto Trait Implementations

impl<W> RefUnwindSafe for ParquetWriter<W> where
W: RefUnwindSafe,

impl<W> Send for ParquetWriter<W> where
W: Send,

impl<W> Sync for ParquetWriter<W> where
W: Sync,

impl<W> Unpin for ParquetWriter<W> where
W: Unpin,

impl<W> UnwindSafe for ParquetWriter<W> where
W: UnwindSafe,

Blanket Implementations

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impl<T> Any for T where
T: 'static + ?Sized,

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pub fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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impl<T> Borrow<T> for T where
T: ?Sized,

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pub fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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impl<T> BorrowMut<T> for T where
T: ?Sized,

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pub fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

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impl<T> From<T> for T

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pub fn from(t: T) -> T

Performs the conversion.

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impl<T, U> Into for T where
U: From<T>,

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pub fn into(self) -> U

Performs the conversion.

impl<T> Pointable for T

pub const ALIGN: usize

The alignment of pointer.

type Init = T

The type for initializers.

pub unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more

pub unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more

pub unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more

pub unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more

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impl<T, U> TryFrom for T where
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

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pub fn try_from(value: U) -> Result<T, <T as TryFrom>::Error>

Performs the conversion.

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impl<T, U> TryInto for T where
U: TryFrom<T>,

type Error = >::Error

The type returned in the event of a conversion error.

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pub fn try_into(self) -> Result<U, >::Error>

Performs the conversion.

Struct polars_io::parquet::ParquetWriter[−][src]

Example

Implementations

impl<W> ParquetWriter<W> where
W: Write + Seek,

pub fn new(writer: W) -> Self where
W: Write + Seek,

pub fn with_compression(self, compression: Compression) -> Self

pub fn finish(self, df: &DataFrame) -> Result<()>

Auto Trait Implementations

impl<W> RefUnwindSafe for ParquetWriter<W> where
W: RefUnwindSafe,

impl<W> Send for ParquetWriter<W> where
W: Send,

impl<W> Sync for ParquetWriter<W> where
W: Sync,

impl<W> Unpin for ParquetWriter<W> where
W: Unpin,

impl<W> UnwindSafe for ParquetWriter<W> where
W: UnwindSafe,

Blanket Implementations

impl<T> Any for T where
T: 'static + ?Sized,

pub fn type_id(&self) -> TypeId

impl<T> Borrow<T> for T where
T: ?Sized,

pub fn borrow(&self) -> &T

impl<T> BorrowMut<T> for T where
T: ?Sized,

pub fn borrow_mut(&mut self) -> &mut T

impl<T> From<T> for T

pub fn from(t: T) -> T

impl<T, U> Into<U> for T where
U: From<T>,

pub fn into(self) -> U

impl<T> Pointable for T

pub const ALIGN: usize

type Init = T

pub unsafe fn init(init: <T as Pointable>::Init) -> usize

pub unsafe fn deref<'a>(ptr: usize) -> &'a T

pub unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

pub unsafe fn drop(ptr: usize)

impl<T, U> TryFrom<U> for T where
U: Into<T>,

type Error = Infallible

pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Struct polars_io::parquet::ParquetWriter[−][src]

Example

Implementations

impl<W> ParquetWriter<W> where W: Write + Seek,

pub fn new(writer: W) -> Self where W: Write + Seek,

pub fn with_compression(self, compression: Compression) -> Self

pub fn finish(self, df: &DataFrame) -> Result<()>

Auto Trait Implementations

impl<W> RefUnwindSafe for ParquetWriter<W> where W: RefUnwindSafe,

impl<W> Send for ParquetWriter<W> where W: Send,

impl<W> Sync for ParquetWriter<W> where W: Sync,

impl<W> Unpin for ParquetWriter<W> where W: Unpin,

impl<W> UnwindSafe for ParquetWriter<W> where W: UnwindSafe,

Blanket Implementations

impl<T> Any for T where T: 'static + ?Sized,

pub fn type_id(&self) -> TypeId

impl<T> Borrow<T> for T where T: ?Sized,

pub fn borrow(&self) -> &T

impl<T> BorrowMut<T> for T where T: ?Sized,

pub fn borrow_mut(&mut self) -> &mut T

impl<T> From<T> for T

pub fn from(t: T) -> T

impl<T, U> Into<U> for T where U: From<T>,

pub fn into(self) -> U

impl<T> Pointable for T

pub const ALIGN: usize

type Init = T

pub unsafe fn init(init: <T as Pointable>::Init) -> usize

pub unsafe fn deref<'a>(ptr: usize) -> &'a T

pub unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

pub unsafe fn drop(ptr: usize)

impl<T, U> TryFrom<U> for T where U: Into<T>,

type Error = Infallible

pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

impl<T, U> TryInto<U> for T where U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

impl<W> ParquetWriter<W> where
W: Write + Seek,

pub fn new(writer: W) -> Self where
W: Write + Seek,

impl<W> RefUnwindSafe for ParquetWriter<W> where
W: RefUnwindSafe,

impl<W> Send for ParquetWriter<W> where
W: Send,

impl<W> Sync for ParquetWriter<W> where
W: Sync,

impl<W> Unpin for ParquetWriter<W> where
W: Unpin,

impl<W> UnwindSafe for ParquetWriter<W> where
W: UnwindSafe,

impl<T> Any for T where
T: 'static + ?Sized,

impl<T> Borrow<T> for T where
T: ?Sized,

impl<T> BorrowMut<T> for T where
T: ?Sized,

impl<T, U> Into<U> for T where
U: From<T>,

impl<T, U> TryFrom<U> for T where
U: Into<T>,

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,