ray.data.expressions.ColumnExpr

class ray.data.expressions.ColumnExpr(name: str)

Bases: Expr

Expression that references a column by name.

This expression type represents a reference to an existing column in the dataset. When evaluated, it returns the values from the specified column.

Parameters:

name – The name of the column to reference

Example

>>> from ray.data.expressions import col
>>> # Reference the "age" column
>>> age_expr = col("age") # Creates ColumnExpr(name="age")

DeveloperAPI: This API may change across minor Ray releases.

Methods

is_in	Check if the expression value is in a list of values.
is_not_null	Check if the expression value is not null.
is_null	Check if the expression value is null.
not_in	Check if the expression value is not in a list of values.

Attributes

name
data_type