Struct polars::prelude::CsvWriter

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pub struct CsvWriter<W> where
    W: Write, { /* private fields */ }

Expand description

Write a DataFrame to csv.

Don’t use a Buffered writer, the CsvWriter internally already buffers writes.

Implementations

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impl<W> CsvWriter<W> where
W: Write,

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pub fn has_header(self, has_header: bool) -> CsvWriter<W>

Set whether to write headers

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pub fn with_delimiter(self, delimiter: u8) -> CsvWriter<W>

Set the CSV file’s column delimiter as a byte character

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pub fn with_batch_size(self, batch_size: usize) -> CsvWriter<W>

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pub fn with_date_format(self, format: Option<String>) -> CsvWriter<W>

Set the CSV file’s date format

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pub fn with_time_format(self, format: Option<String>) -> CsvWriter<W>

Set the CSV file’s time format

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pub fn with_datetime(self, format: Option<String>) -> CsvWriter<W>

Set the CSV file’s timestamp format array in

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pub fn with_quoting_char(self, char: u8) -> CsvWriter<W>

Set the single byte character used for quoting

Trait Implementations

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impl<W> SerWriter<W> for CsvWriter<W> where
W: Write,

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fn new(buffer: W) -> CsvWriter<W>

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

Auto Trait Implementations

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

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

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

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

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

Blanket Implementations

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

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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,

const: unstable · source

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,

const: unstable · source

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

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

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

const: unstable · source

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

impl<T> Pointable for T

const ALIGN: usize = mem::align_of::<T>()

The alignment of pointer.

type Init = T

The type for initializers.

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

Initializes a with the given initializer. Read more

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

Dereferences the given pointer. Read more

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

Mutably dereferences the given pointer. Read more

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.

const: unstable · source

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.

const: unstable · source

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

Performs the conversion.

Struct polars::prelude::CsvWriter

Implementations

impl<W> CsvWriter<W> where W: Write,

pub fn has_header(self, has_header: bool) -> CsvWriter<W>

pub fn with_delimiter(self, delimiter: u8) -> CsvWriter<W>

pub fn with_batch_size(self, batch_size: usize) -> CsvWriter<W>

pub fn with_date_format(self, format: Option<String>) -> CsvWriter<W>

pub fn with_time_format(self, format: Option<String>) -> CsvWriter<W>

pub fn with_datetime(self, format: Option<String>) -> CsvWriter<W>

pub fn with_quoting_char(self, char: u8) -> CsvWriter<W>

Trait Implementations

impl<W> SerWriter<W> for CsvWriter<W> where W: Write,

fn new(buffer: W) -> CsvWriter<W>

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

Auto Trait Implementations

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

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

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

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

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

Blanket Implementations

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

fn type_id(&self) -> TypeId

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

fn borrow(&self) -> &T

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

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

impl<T> From<T> for T

fn from(t: T) -> T

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

fn into(self) -> U

impl<T> Pointable for T

const ALIGN: usize = mem::align_of::<T>()

type Init = T

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

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

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

unsafe fn drop(ptr: usize)

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

type Error = Infallible

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

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

impl<V, T> VZip<V> for T where V: MultiLane<T>,

fn vzip(self) -> V

impl<W> CsvWriter<W> where
W: Write,

impl<W> SerWriter<W> for CsvWriter<W> where
W: Write,

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

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

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

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

impl<W> UnwindSafe for CsvWriter<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>,

impl<V, T> VZip<V> for T where
V: MultiLane<T>,