Steven D'Aprano wrote:
On 29/04/13 10:29, Ethan Furman wrote:- bool(1) # True - int('11') # 11 - str(var) # whatever var had in it, now as a strI think that's a red herring, because you're comparing the use of the object constructor with look-up by name.
How does what bool() is doing differ from a lookup? It's not constructing a new instance. Neither is int() in the cases where the argument is in the range of values that it caches. More generally, the built-in types can be thought of as coercion functions -- they take an argument and return some related value from the type's repertoire. Whether they do that by constructing a new object or not is an implementation detail. -- Greg _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
