polars.LazyFrame.cleared

LazyFrame.cleared() → polars.internals.lazy_frame.LazyFrame

Create an empty copy of the current LazyFrame.

The copy has an identical schema but no data.

See also

clone

Cheap deepcopy/clone.

Examples

>>> df = pl.DataFrame(
...     {
...         "a": [None, 2, 3, 4],
...         "b": [0.5, None, 2.5, 13],
...         "c": [True, True, False, None],
...     }
... ).lazy()
>>> df.cleared().fetch()
shape: (0, 3)
┌─────┬─────┬──────┐
│ a   ┆ b   ┆ c    │
│ --- ┆ --- ┆ ---  │
│ i64 ┆ f64 ┆ bool │
╞═════╪═════╪══════╡
└─────┴─────┴──────┘