Subclass of int and initialisation with not integer values

[Boris Boutillier]

Hi all,

I've got a little problem with subclass of int.

Here is a sample of what I want to do :

class toto(int):
	true  = 'O'
	false = 'N'
	def __init__(self,str):
		self.str = str
		if str=='O':
			int.__init__(self,1)
		elif str == 'N':
			int.__init__(self,0)
		else:
			raise ValueError, 'Not valid value %s'%(str)
	def __str__(self):
		return self.str
>>> x = toto('N')
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
ValueError: invalid literal for int(): N
>>> x = toto(1)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "<stdin>", line 11, in __init__
ValueError: Not valid value 1

In some way it seems that the int initialisation is called before __init__
I want toto to be a subclass of int because I need toto objects to be
used as index for lists.

Do you know some way to solve the problem ? Here true and false are 'O'
and 'N' for the example but in my example I use a metaclass to create
numerous classes of this kind, with different true letter and false
letter.

Boris
.