Le Thursday 31 July 2008 16:46:28 Nikolaus Rath, vous avez écrit : > Maric Michaud <[EMAIL PROTECTED]> writes: > >> > Can someone explain to me the difference between a type and a class? > >> > >> If your confusion is of a more general nature I suggest reading the > >> introduction of `Design Patterns' (ISBN-10: 0201633612), under > >> `Specifying Object Interfaces'. > >> > >> In short: A type denotes a certain interface, i.e. a set of signatures, > >> whereas a class tells us how an object is implemented (like a > >> blueprint). A class can have many types if it implements all their > >> interfaces, and different classes can have the same type if they share a > >> common interface. The following example should clarify matters: > > > > Of course, this is what a type means in certain literature about OO > > (java-ish), but this absolutely not what type means in Python. Types > > are a family of object with a certain status, and they're type is > > "type", conventionnaly named a metatype in standard OO. > > [...] > > Hmm. Now you have said a lot about Python objects and their type, but > you still haven't said what a type actually is (in Python) and in what > way it is different from a class. Or did I miss something?
This paragraph ? """ - types, or classes, are all instance of type 'type' (or a subclass of it), they can be instantiated and they produce objects (ordinary object in general) with theirslef as a type. """ Maybe it's still unclear that "types" and "classes" *are* synonyms in Python. -- _____________ Maric Michaud -- http://mail.python.org/mailman/listinfo/python-list
