Struct polars_io::csv::CsvWriter

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

Available on crate features csv-file or json only.

Write a DataFrame to csv.

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

Implementations

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

pub fn has_header(self, has_header: bool) -> Self

Set whether to write headers

pub fn with_delimiter(self, delimiter: u8) -> Self

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

pub fn with_batch_size(self, batch_size: usize) -> Self

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

Set the CSV file’s date format

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

Set the CSV file’s time format

pub fn with_datetime_format(self, format: Option<String>) -> Self

Set the CSV file’s datetime format

pub fn with_float_precision(self, precision: Option<usize>) -> Self

Set the CSV file’s float precision

pub fn with_quoting_char(self, char: u8) -> Self

Set the single byte character used for quoting

pub fn with_null_value(self, null_value: String) -> Self

Set the CSV file’s null value representation

Trait Implementations

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

fn new(buffer: W) -> Self

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