Steven D'Aprano <steve+comp.lang.pyt...@pearwood.info> writes: > LJ wrote: > > > def gt(l): > > a["1"] = a["1"] | set([l]) > > The difference between this example and your second one: > > > def gt2(l): > > b=b+l > > > is that the second is a "binding operation" and the first is not.
I disagree; they're both binding operations (and they both use the binding operator ‘=’ to express this). The difference between the two is: what reference is being bound? * In the first example, the reference is ‘a["1"]’. That reference is re-bound to a different object; whatever object it was previously bound to is forgotten. * In the second example, the reference is ‘b’. That reference is re-bound to a different object; whatever object it was previously bound to is forgotten. So, both of them bind (or re-bind) a reference to an object. The only difference between the operations is the parameters. -- \ “People always ask me, ‘Where were you when Kennedy was shot?’ | `\ Well, I don't have an alibi.” —Emo Philips | _o__) | Ben Finney -- https://mail.python.org/mailman/listinfo/python-list
