Allen Fowler wrote:
> I seem to be having an issue with __getattr__() being called even if
> the proporite already exists... I thought that this was not supposed
> to happen.
I think you've misunderstood. __getattr__() should always be called, it
allows you to intercept and reimplement the behavior of a attribute
lookup to suit your needs. Typically, my __getattrs__() look like this:
def __getattr__( self, attr ):
if has_attr( usuallysomethingotherthanself, attr ):
do_one_thing()
else:
do_something_else()
>
> Is there a typo somewhere, or I do i misunderstand things?
>
> class someclass(object):
>
>
> def __init__(self, **kargs):
>
> self.valid_props = [ 'foo', 'bar', 'baz' ]
>
> for prop in self.valid_props:
> if kargs.has_key(prop):
> self.__setattr__(prop, kargs[prop])
>
> def __getattr__(self,attr):
> if attr in self.valid_props:
> # This print should throw an exception,
> # but it does not. It shows the value.
> print "Oh no.. This was not found: %s" % self.__dict__[attr]
> return 'n/a'
> else:
> raise AttributeError, attr
>
>
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