dwave.optimization.model.Symbol.id#

Symbol.id()#

Return the “identity” of the underlying node.

This identity is unique to the underlying node, rather than the identity of the Python object representing it. Therefore, symdol.id() is not the same as id(symbol)!

Examples

>>> from dwave.optimization import Model
...
>>> model = Model()
>>> a = model.binary()
>>> aa, = model.iter_symbols()
>>> assert a.id() == aa.id()
>>> assert id(a) != id(aa)

While symbols are not hashable, the .id() is.

>>> model = Model()
>>> x = model.integer()
>>> seen = {x.id()}