polars.select#

polars.select(*exprs: IntoExpr | Iterable[IntoExpr], **named_exprs: IntoExpr) → DataFrame[source]#

Run polars expressions without a context.

This is syntactic sugar for running df.select on an empty DataFrame.

Parameters:

*exprs: Column(s) to select, specified as positional arguments. Accepts expression input. Strings are parsed as column names, other non-expression inputs are parsed as literals.
**named_exprs: Additional columns to select, specified as keyword arguments. The columns will be renamed to the keyword used.

Returns:

DataFrame

Examples

>>> foo = pl.Series("foo", [1, 2, 3])
>>> bar = pl.Series("bar", [3, 2, 1])
>>> pl.select(min=pl.min_horizontal(foo, bar))
shape: (3, 1)
┌─────┐
│ min │
│ --- │
│ i64 │
╞═════╡
│ 1   │
│ 2   │
│ 1   │
└─────┘