[Zope3-Users] Re: Checking if an interface is provided by an object or could be adapted to

[Dominik Huber]

Bernd Dorn wrote:
>
> On 01.05.2006, at 01:55, Stephan Richter wrote:
>
>> On Sunday 30 April 2006 19:34, Bernd Dorn wrote:
>>> component.queryMultiAdapter((bar,baz), IFoo) is not None or False
>
> this way you always get True or False
>
> ok, for this case it is ok
>
> but when you have a class that  uses __conform__ None may be returned 
> when you use this
>
> IFoo(context,False)
>
> or am i wrong?
No, if __conform__ return None, the registered adapters will be looked 
up afterward. If no global adapter could be found the default will be 
returned regularly

Regards,
Dominik