polars flatten
For lazyframe.
An alias for polars explode.
warning This command requires a plugin The
polars flattencommand resides in thepolarsplugin. To use this command, you must install and registernu_plugin_polars. See the Plugins chapter in the book for more information.
Command Type
plugin
Signature
> polars flatten {flags} ...rest
Parameters
...rest: Columns to flatten, only applicable for dataframes.
Input/output types:
| input | output |
|---|---|
| polars_expression | polars_expression |
| polars_selector | polars_expression |
| polars_dataframe | polars_dataframe |
Examples
Flatten the specified dataframe
> [[id name hobbies]; [1 Mercy [Cycling Knitting]] [2 Bob [Skiing Football]]] | polars into-df | polars flatten hobbies | polars collect
╭───┬────┬───────┬──────────╮
│ # │ id │ name │ hobbies │
├───┼────┼───────┼──────────┤
│ 0 │ 1 │ Mercy │ Cycling │
│ 1 │ 1 │ Mercy │ Knitting │
│ 2 │ 2 │ Bob │ Skiing │
│ 3 │ 2 │ Bob │ Football │
╰───┴────┴───────┴──────────╯
Select a column and flatten the values
> [[id name hobbies]; [1 Mercy [Cycling Knitting]] [2 Bob [Skiing Football]]] | polars into-df | polars select (polars col hobbies | polars flatten)
╭───┬──────────╮
│ # │ hobbies │
├───┼──────────┤
│ 0 │ Cycling │
│ 1 │ Knitting │
│ 2 │ Skiing │
│ 3 │ Football │
╰───┴──────────╯
Ported from nushell/nushell.github.io. Copyright (c) 2021 Nushell Project. MIT License.