param.reactive.reactive_ops.is_

reactive_ops.is_(other) → rx

Perform a logical “is” comparison with the given operand.

This method checks if the current object is the same object (i.e., identical in memory) as the given operand. The result is returned as a new reactive expression.

Parameters:

other (any) – The operand to compare for object identity.

Returns:

A new reactive expression representing the result of the “is” comparison.

Return type:

rx

Examples

Check if a reactive value refers to the same object:

>>> import param
>>> obj1 = object()
>>> obj2 = object()
>>> rx_obj = param.rx(obj1)
>>> rx_is = rx_obj.rx.is_(obj1)
>>> rx_is.rx.value
True

Compare with a different object:

>>> rx_is = rx_obj.rx.is_(obj2)
>>> rx_is.rx.value
False

Update the reactive value and re-check identity:

>>> rx_obj.rx.value = obj2
>>> rx_is.rx.value
False