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DataExporter

Struct DataExporter 

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pub struct DataExporter { /* private fields */ }
Expand description

数据导出器

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impl DataExporter

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pub fn new() -> Self

创建新的导出器

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pub fn with_config(config: ExportConfig) -> Self

使用自定义配置创建导出器

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pub fn export( &self, df: &mut DataFrame, path: &Path, format: Option<ExportFormat>, ) -> Result<u64>

导出 DataFrame 到文件

§参数
  • df: 要导出的 DataFrame
  • path: 输出文件路径
  • format: 导出格式(如果为 None,则从文件扩展名推断)
§返回

导出的字节数

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pub fn export_streaming( &self, lf: LazyFrame, path: &Path, format: Option<ExportFormat>, ) -> Result<u64>

流式导出大文件(分块写入)

适用于 GB 级数据,内存占用低

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pub fn export_to_stdout( &self, df: &mut DataFrame, format: ExportFormat, ) -> Result<()>

导出到标准输出(用于管道)

Trait Implementations§

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impl Default for DataExporter

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fn default() -> Self

Returns the “default value” for a type. Read more

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where T: 'static + ?Sized,

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