A definition may also be categorised as an operational definition or theoretical definition. The concept that a definition ought to state the essence of a thing led to the excellence between nominal and real essence—a distinction originating with Aristotle. In the Posterior Analytics, he says that the that means of a made-up name can be identified (he provides the instance “goat stag”) without knowing what he calls the “important nature” of the thing that the name would denote . This led medieval logicians to tell apart between what they referred to as the quid nominis, or the “whatness of the name”, and the underlying nature frequent to all of the issues it names, which they known as the quid rei, or the “whatness of the factor”.
This attribute is certainly one of a set of specialized identifiers in Python which might be sometimes known as magic attributes or magic strategies …