Re: decorator to prevent adding attributes to class?

[rbossy]

>class Foo(Freezeable):

>def __init__(self):
self.bar = 42
self.freeze() # ok, we set all variables, no more from here
x = Foo()
print x.bar
x.bar = -42
print x.bar
x.baz = "OMG! A typo!"

Pretty nice, but unfortunately the subclass has to remember to call freeze
in it's init. Too bad that can't be automated.

Not to mention that subclasses constructors could be bit, like that:

class Foo(Freezeable):
...

class Bar(Foo):
def __init__(self, *args, **kw):
Foo.__init__(self, *args, **kw)
self.something_bar = 42 # this should raise AttributeError
Cheers
RB