ray.data.expressions.LiteralExpr#

class ray.data.expressions.LiteralExpr(value: Any)[source]#

Bases: Expr

Expression that represents a constant scalar value.

This expression type represents a literal value that will be broadcast to all rows when evaluated. The value can be any Python object.

Parameters:: value – The constant value to represent

Example

>>> from ray.data.expressions import lit
>>> import numpy as np
>>> # Create a literal value
>>> five = lit(5) # Creates LiteralExpr(value=5)
>>> name = lit("John") # Creates LiteralExpr(value="John")
>>> numpy_val = lit(np.int32(42)) # Creates LiteralExpr with numpy type

DeveloperAPI: This API may change across minor Ray releases.

Methods

`abs`	Compute the absolute value of the expression.
`alias`	Rename the expression.
`ceil`	Round values up to the nearest integer.
`exp`	Compute the natural exponential of the expression.
`floor`	Round values down to the nearest integer.
`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.
`ln`	Compute the natural logarithm of the expression.
`log10`	Compute the base-10 logarithm of the expression.
`log2`	Compute the base-2 logarithm of the expression.
`negate`	Compute the negation of the expression.
`not_in`	Check if the expression value is not in a list of values.
`power`	Raise the expression to the given power.
`round`	Round values to the nearest integer using PyArrow semantics.
`sign`	Compute the sign of the expression.
`to_pyarrow`	Convert this Ray Data expression to a PyArrow compute expression.
`trunc`	Truncate fractional values toward zero.

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.
`value`
`data_type`