On Sep 12, 4:30 pm, Bojan Mihelac <[EMAIL PROTECTED]> wrote:
> On Sep 12, 5:21 pm, Christian Heimes <[EMAIL PROTECTED]> wrote:
>
> > Bojan Mihelac wrote:
> > > I guess A class not yet exists in line 4. Is it possible to achive
> > > adding dynamic attributes without using exec?
>
> > Correct, the class doesn't exist until the end of the class body. You
> > can either do it outside the class definition or you can use a metaclass.
>
> > Christian
>
> thanks, can you give example on using a metaclass?
class MoreMeta(type):
def __init__(self, name, bases, attrs):
more = attrs.get('moreattrs')
if more:
for attr, val in more.iteritems():
setattr(self, attr, val)
class MoreObject(object):
__metaclass__ = MoreMeta
class A(MoreObject):
moreattrs = {}
for i in '12':
moreattrs['title_' + i] = int(i)
>>> A.title_1
1
>>> A.title_2
2
>>>
--
Arnaud
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