polars::prelude

Struct CsvReader

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pub struct CsvReader<R>
where R: MmapBytesReader,
{ /* private fields */ }
Available on crate feature polars-io only.
Expand description

Create a new DataFrame by reading a csv file.

§Example

use polars_core::prelude::*;
use polars_io::prelude::*;
use std::fs::File;

fn example() -> PolarsResult<DataFrame> {
    CsvReadOptions::default()
            .with_has_header(true)
            .try_into_reader_with_file_path(Some("iris.csv".into()))?
            .finish()
}

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Trait Implementations§

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impl<R> SerReader<R> for CsvReader<R>
where R: MmapBytesReader,

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fn new(reader: R) -> CsvReader<R>

Create a new CsvReader from a file/stream using default read options. To use non-default read options, first construct CsvReadOptions and then use any of the (try)_into_ methods.

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fn finish(self) -> Result<DataFrame, PolarsError>

Read the file and create the DataFrame.

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fn set_rechunk(self, _rechunk: bool) -> Self
where Self: Sized,

Make sure that all columns are contiguous in memory by aggregating the chunks into a single array.

Auto Trait Implementations§

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impl<R> Freeze for CsvReader<R>
where R: Freeze,

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impl<R> !RefUnwindSafe for CsvReader<R>

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impl<R> Send for CsvReader<R>

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impl<R> Sync for CsvReader<R>

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impl<R> Unpin for CsvReader<R>
where R: Unpin,

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impl<R> !UnwindSafe for CsvReader<R>

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

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Gets the TypeId of self. Read more
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where T: ?Sized,

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Immutably borrows from an owned value. Read more
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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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where U: From<T>,

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Calls U::from(self).

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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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where F: FnOnce(&Self) -> bool,

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Initializes a with the given initializer. Read more
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Dereferences the given pointer. Read more
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Mutably dereferences the given pointer. Read more
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where U: TryFrom<T>,

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

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

Performs the conversion.
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where S: Into<Dispatch>,

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