>>46
__slots__の事？

class C(object):
__slots__ = ["test"]

def __init__(self):
self.test = 1

>>> c = C()
>>> c.test = 2
>>> print c.test
2
>>> c.typo = 3
Traceback (most recent call last):
File "test.py", line 37, in ?
c.typo = 3
AttributeError: 'C' object has no attribute 'typo'