On 18/12/2013 11:16, spir wrote:
On 12/18/2013 12:07 PM, eryksun wrote:
On Wed, Dec 18, 2013 at 5:40 AM, spir <[email protected]> wrote:
C.__setattr__(C, "baz", "BAZ")
which fails, for any reason, with
TypeError: can't apply this __setattr__ to type object
You need __setattr__ from the metaclass:
>>> class C: pass
...
>>> type(C).__setattr__(C, "baz", "BAZ")
>>> C.baz
'BAZ'
Oh, that makes sense: so, __setattr__ on a class is for its instances,
right? (thus, to set attrs on a class itself, we need ___setattr__ from
its own class, if I understand rightly?)
You can bind the method like this:
>>> C_setattr = type(C).__setattr__.__get__(C)
>>> C_setattr('foo', 'bar')
>>> C.foo
'bar'
But just use built-in setattr(), really.
Really, yes!
Denis
Can I be so bold as to ask how discussing metaclasses and __setattr__ on
a tutor mailing list is going to help the newbie who's having problems
with their "hello world" program?
--
My fellow Pythonistas, ask not what our language can do for you, ask
what you can do for our language.
Mark Lawrence
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