[Pyrex] extending a builtin type

[Robin Becker]

Greg Ewing wrote:
> Robin Becker wrote:
>> I'm a bit unclear how to carry out initialization for this case.
> 
> Pyrex will take care of calling the base class __new__
> for you. If you want to initialise C attributes of your
> own, write a __cinit__ method to do that.
> 
> Optionally you can write an __init__ that passes whatever
> arguments you want to list.__init__, which is what will
> determine the initial contents of the list.
> 
I'm still not certain about the taxonomy of methods and attributes. My 
experiments show that __cinit__ is called before __init__ and that self is 
already at least partially initialized ie


cdef class ObjectList(list):
	cdef public int debug
	def __cinit__(self,*args):
		print '__cinit__',self, args
	def __init__(self,*args):
		list.__init__(self,*args)
		print '__init__',self, args
		self.debug = 0


ObjectList([1,2,3]) produces

__cinit__ [] ([1, 2, 3],)
__init__ [1, 2, 3] ([1, 2, 3],)

Is there a reason not to do the list.__init__ initialisation from args in __cinit__?
-- 
Robin Becker