I suppose I was lulled into complacency by how Python makes so many things look like classes, but I'm starting to realize that they're not, are they?
I'm writing a C program which handles Python objects in different ways based on their type. I do a PyInstance_Check(PyObj) to determine if the PyObj is an instance, but it is returning 0 on a lot of stuff that I thought would be an instance. So I did the following simple test on three things that look like instances: Python 2.5.1 (r251:54863, Apr 18 2007, 08:51:08) [MSC v.1310 32 bit (Intel)] on win32 Type "help", "copyright", "credits" or "license" for more information. >>> class a: pass ... >>> type(a()) <type 'instance'> >>> type(Exception()) <type 'exceptions.Exception'> >>> class b(dict): pass ... >>> type(b()) <class '__main__.b'> I was relieved that a() returns an instance, but I was surprised that Exceptions aren't really instances at all. And what's the deal with derving a class from a standard type like a dictionary? I thought for sure, that would be an instance, but this shows it is a class?!? Can anyone explain the last one and/or give me a simple test I can do in C to determine whether a Python object is "instance-like"? Many thanks, Gre7g -- http://mail.python.org/mailman/listinfo/python-list
