Expr.slice

methodView source ↗

def slice(offset: int | Expr, length: int | Expr | None = None) -> Expr

Categories: filters

Compute a slice of the TableFrame for the specified columns.

Parameters

parameter

offset

the offset to start the slice.

parameter

length

the length of the slice.

Examples

>>> import tabsdata as td
>>>
>>> tf: td.TableFrame ...
>>>
┌──────┬──────┐
│ x    ┆ y    │
│ ---  ┆ ---  │
│ f64  ┆ f64  │
╞══════╪══════╡
│ 1.0  ┆ 2.0  │
│ 2.0  ┆ 2.0  │
│ NaN  ┆ NaN  │
│ 4.0  ┆ NaN  │
│ 5.0  ┆ null │
│ null ┆ null │
└──────┴──────┘
>>>
>>> tf.select(tf.all().slice(1,2))
>>>
┌─────┬─────┐
│ x   ┆ y   │
│ --- ┆ --- │
│ f64 ┆ f64 │
╞═════╪═════╡
│ 2.0 ┆ 2.0 │
│ NaN ┆ NaN │
└─────┴─────┘