Thomas Lotze wrote:
[snip]
> Then let me suggest not changing the call signature of an interface at all
> but only add one or a few new methods. Firstly, this will keep backwards
> compatibility even with code that adapts a tuple, and secondly, it allows
> us to implement a simple and consistent API anyway.

That was my original proposal, right? (I only propose adding a 'name' 
argument to the IFoo() lookup if it isn't there already, otherwise it's 
all new methods).

> My favourite option under these circumstances would be something like
> 
> IFoo.query(*args, default=None, ...)
> 
> though possibly with a method name in a different color of bike shed,
> where IFoo.query(x) is equivalent to IFoo(x) but a multiadapter lookup may
> be written as IFoo.query(x, y).

It could indeed be done as a single method. See Shane's post for a 
possible implementation.

Regards,

Martijn



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