isclose()#

relationalai.std.math
isclose(x: Number | Producer, y: Number | Producer, tolerance: Number | Producer = 1e-9) -> Expression

Checks if two numbers are approximately equal by comparing their absolute difference to a tolerance. Must be called in a rule or query context.

Parameters#

NameTypeDescription
xNumber or ProducerThe first number to compare.
yNumber or ProducerThe second number to compare.
toleranceNumber or ProducerThe maximum difference allowed between x and y. Default is 1e-9.

Returns#

An Expression object.

Example#

import relationalai as rai
from relationalai.std import alias
from relationalai.std.math import isclose

# Create a model with a `Person` type.
model = rai.Model("people")
Person = model.Type("Person")

# Add some people to the model.
with model.rule():
    Person.add(name="Alice", height_cm=170)
    Person.add(name="Bob", height_cm=180)
    Person.add(name="Charlie", height_cm=180.0001)

# Find people who have the same height.
with model.query() as select:
    p1, p2 = Person(), Person()
    p1 < p2
    isclose(p1.height_cm, p2.height_cm, tolerance=1e-3)
    response = select(p1.name, p2.name)

print(response.results)e
# Output:
#   name    name2
# 0  Bob  Charlie