Ben Finney <ben+pyt...@benfinney.id.au> writes: > The first one is defined (by the syntax for literals) to create a > *single* string object. Semantically, the fragments are specifying one > object in a single step. > > The second is semantically (i.e. by the semantics of how such > expressions are defined to work) creating two distinct objects, then > creating a third using an operation, then discarding the first two.
Because I know there are resident pedants who love to get into the details: I know that's not exactly how it works internally, and it doesn't matter. I'm not talking about what bytecode is produced, I'm talking about the semantics of what the language reference defines: ‘+’ implies that a new object will be created by calling ‘__add__’ or ‘__radd__’. What the optimiser decides to omit is not relevant to that point: the semantics of the ‘+’ operator imples that a third object will result from combining two other objects. -- \ Moriarty: “Forty thousand million billion dollars? That money | `\ must be worth a fortune!” —The Goon Show, _The Sale of | _o__) Manhattan_ | Ben Finney _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
