ray.data.expressions.UnaryExpr#

class ray.data.expressions.UnaryExpr(op: Operation, operand: Expr)[source]#

Bases: Expr

Expression that represents a unary operation on a single expression.

This expression type represents an operation with one operand. Common unary operations include logical NOT, IS NULL, IS NOT NULL, etc.

Parameters:

op – The operation to perform (from Operation enum)
operand – The operand expression

Example

>>> from ray.data.expressions import col
>>> # Check if a column is null
>>> expr = col("age").is_null()  # Creates UnaryExpr(IS_NULL, col("age"))
>>> # Logical not
>>> expr = ~(col("active"))  # Creates UnaryExpr(NOT, col("active"))

DeveloperAPI: This API may change across minor Ray releases.

Methods

`alias`	Rename the expression.
`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.
`to_pyarrow`	Convert this Ray Data expression to a PyArrow compute expression.

Attributes

`dt`	Access datetime operations for this expression.
`list`	Access list operations for this expression.
`name`	Get the name associated with this expression.
`str`	Access string operations for this expression.
`struct`	Access struct operations for this expression.
`op`
`operand`
`data_type`