polars save for lazyframe
Saves a dataframe to disk. For lazy dataframes a sink operation will be used if the file type supports it (parquet, ipc/arrow, csv, and ndjson).
This command requires a plugin
The polars save command resides in the polars plugin. To use this command, you must install and register nu_plugin_polars. See the Plugins chapter in the book for more information.
Signature
> polars save {flags} (path)
Flags
--type, -t {string}: File type: csv, json, parquet, arrow/ipc. If omitted, derive from file extension--avro-compression {string}: Compression for avro supports deflate or snappy--csv-delimiter {string}: file delimiter character--csv-no-header: Indicates to exclude a header row for CSV files.
Parameters
path: Path or cloud url to write to
Input/output types:
| input | output |
|---|---|
| any | string |
Examples
Performs a streaming collect and save the output to the specified file
> [[a b];[1 2] [3 4]] | polars into-lazy | polars save test.parquetSaves dataframe to parquet file
> [[a b]; [1 2] [3 4]] | polars into-df | polars save test.parquetSaves dataframe to arrow file
> [[a b]; [1 2] [3 4]] | polars into-df | polars save test.arrowSaves dataframe to NDJSON file
> [[a b]; [1 2] [3 4]] | polars into-df | polars save test.ndjsonSaves dataframe to avro file
> [[a b]; [1 2] [3 4]] | polars into-df | polars save test.avroSaves dataframe to CSV file
> [[a b]; [1 2] [3 4]] | polars into-df | polars save test.csvSaves dataframe to CSV file using other delimiter
> [[a b]; [1 2] [3 4]] | polars into-df | polars save test.csv --csv-delimiter '|'