Struct BatchedWriter

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

Available on crate features csv or json only.

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impl<W: Write> BatchedWriter<W>

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

Write a batch to the csv writer.

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The caller must ensure the chunks in the given DataFrame are aligned.

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pub fn finish(&mut self) -> PolarsResult<()>

Writes the header of the csv file if not done already. Returns the total size of the file.

Auto Trait Implementations§

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impl<W> !UnwindSafe for BatchedWriter<W>

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