Chris Rebert a écrit :
On Mon, Jan 19, 2009 at 4:22 AM, Phillip B Oldham
<phillip.old...@gmail.com> wrote:
On Mon, Jan 19, 2009 at 12:15 PM, Chris Rebert <c...@rebertia.com> wrote:
Assuming I'm interpreting you correctly (you're going to have to use
something like a getter):
Thanks, but I'm looking for a way to do it *without* using a getter as
I don't have easy access to the class (its being generated for me
elsewhere). Essentially I'd like to overwrite (if possible) the
default behavior when returning certain attributes on certain objects.
To my knowledge, you can't really "overwrite" that behavior without
editing the class (or how it's generated).
Assuming it's really about a *class* object (not instances of it), *and*
it's a new-style class, it is possible:
class Foo(object):
def __init__(self):
self.tags = ['foo', 'bar']
def wrap_tag_access(cls):
def fset(obj, value):
obj._tags = value
def fget(obj):
print "do something here"
return obj._tags
cls.tags = property(fset=fset, fget=fget)
return cls
Foo = wrap_tag_access(Foo)
f = Foo()
print f.tags
The next closest thing would be to write a proxy class that defines a
__getattr__ method implementing the semantics you want.
If it's a "classic" class, then yes, it's probably the best thing to do.
--
http://mail.python.org/mailman/listinfo/python-list
