Kind people, Using Python 3.1 I have been poking around trying to get more insight into Python's innards, and I have a couple of (marginally) related questions.
First, I've looked a fair bit and can't find how one can find the base classes of a subclass? isinstance and issubclass sort of do the opposite of what I want. Surely somewhere there is something like MyThingee.something.orOther.baseClasses() that returns a tuple of the parents? If there is, can you point me to the appropriate documentation? Second, I can subclass most builtin things like int and float and list and so on, and then override operators to play Twilight Zone if I am so inclined. But what happens if I try to subclass function? First attempt: >>> >>> class MyFunction(function): ... pass ... Traceback (most recent call last): File "<stdin>", line 1, in <module> NameError: name 'function' is not defined >>> OK.. so second attempt: >>> >>> def a(): ... pass ... >>> a <function a at 0x00B65810> >>> function Traceback (most recent call last): File "<stdin>", line 1, in <module> NameError: name 'function' is not defined >>> function=type(a) >>> function <class 'function'> >>> >>> class MyFunction(function): ... pass ... Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: type 'function' is not an acceptable base type >>> So, it appears that function is perhaps the equivalent of a Java final class? Or isn't really a class at all but something that "looks like" a class? Anyway, again can you point me to somewhere that I can learn more? In particular, is there a list somewhere of the builtin types that are not subclassable? I'm willing to root through the source code if that is what I need to do, but even there (especially there) a hint as to where to start looking would be helpful. Thank you in advance, Paul -- http://mail.python.org/mailman/listinfo/python-list
