On Tue, Nov 2, 2010 at 10:59 PM, Stefan Behnel <[email protected]> wrote: > Robert Bradshaw, 02.11.2010 23:21: >> On Tue, Nov 2, 2010 at 3:11 PM, Vitja Makarov wrote: >>> http://docs.python.org/reference/datamodel.html#basic-customization >>> >>> """Called to create a new instance of class cls. __new__() is a static >>> method (special-cased so you need not declare it as such) that takes >>> the class of which an instance was requested as its first argument. >>> The remaining arguments are those passed to the object constructor >>> expression (the call to the class). The return value of __new__() >>> should be the new object instance (usually an instance of cls).""" >> >> I was actually thinking about cdef classes, where __new__ is much more >> subtle. I didn't realize it was a static method that takes the class >> as a first argument rather than just a class method. > > It needs to be to support inheritance. You usually call the __new__ method > of the superclass to create the instance that you return. So you must be > able to pass the required class through the hierarchy explicitly.
Good point, I hadn't thought about that. - Robert _______________________________________________ Cython-dev mailing list [email protected] http://codespeak.net/mailman/listinfo/cython-dev
