polars selector by-name for expression
Creates a selector that selects columns by name.
Signature
> polars selector by-name {flags} ...rest
Flags
-
--strict: If set, the selector will error if any specified column names do not exist.
Parameters
-
...rest: Names of columns to select.
Input/output types:
| input | output |
|---|---|
| any | polars_selector |
Examples
Create a selector for columns by name
> polars selector by-name foo bar
Add 10 to specific columns using with-column
> [[a b c]; [1 2 3] [4 5 6]]
| polars into-df
| polars with-column ((polars selector by-name a c) + 10)
| polars collect
╭───┬────┬───┬────╮
│ # │ a │ b │ c │
├───┼────┼───┼────┤
│ 0 │ 11 │ 2 │ 13 │
│ 1 │ 14 │ 5 │ 16 │
╰───┴────┴───┴────╯
Copyright © 2019–2026 The Nushell Project DevelopersLicensed under the MIT License.
https://www.nushell.sh/commands/docs/polars_selector_by-name.html
