>How about "broke" instead of "deprecated":
>
>
> >>> class Old:
>... def __init__(self):
>... self._value = 'broke'
>... value = property(lambda self: self._value)
>...
How is this broken? Properties are not supported for old-style classes.
They may not support features introduced in new-style classes, but that's
hardly the same as "broken".
What does that give you that this does not:
class Old:
def __init__(self):
self.value = 'broke'
To further illustrate, what happens when you do this:
class Old:
def __init__(self):
self._value = 'broke'
def _set_value(self, val):
print "set called"
def _get_value(self):
print "get called"
return self._value
value = property(_get_value, _set_value)
x = Old()
print x.value
x.value = "not broke"
print x.value
print type(x.value)
print x._value
This is what happens:
x = Old()
print x.value
get called
broke
x.value = "not broke"
print x.value
not broke
print type(x.value)
<type 'str'>
print x._value
broke
Now, no exceptions were raised or anything, but with old-style classes I'm
having difficulty thinking of a scenario where they might actually be
useful. I suppose you could use it to do a calculation on instance variables
and return the result. You are probably better of using a method for that
anyway though.
Matt
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