polars.LazyFrame.select¶
- LazyFrame.select(exprs: Union[str, polars.internals.expr.Expr, Sequence[str], Sequence[polars.internals.expr.Expr], polars.internals.series.Series]) polars.internals.lazy_frame.LDF ¶
Select columns from this DataFrame.
- Parameters
- exprs
Column or columns to select.
Examples
>>> df = pl.DataFrame( ... { ... "foo": [1, 2, 3], ... "bar": [6, 7, 8], ... "ham": ["a", "b", "c"], ... } ... ).lazy() >>> df.select("foo").collect() shape: (3, 1) ┌─────┐ │ foo │ │ --- │ │ i64 │ ╞═════╡ │ 1 │ ├╌╌╌╌╌┤ │ 2 │ ├╌╌╌╌╌┤ │ 3 │ └─────┘