[Python-Dev] Updated PEP 362 (Function Signature Object)

[Terry Reedy]

On 6/6/2012 6:38 PM, Steven D'Aprano wrote:

> redundant. Even so, getfullargspec is not doing any harm. We're not
> *adding* complexity, it's already there, and breaking currently working
> code by deprecating and then removing it is not a step we should take
> lightly. API churn is itself a cost.

The 3.x versions of idlelib.CallTips.get_argspec() uses
    inspect.formatargspec(*inspect.getfullargspec(fob))
to create the first line of a calltip for Python coded callables 
(functions and (bound) instance methods, including class(.__init__), 
static and class methods and (with pending patch) instance(.__call__)).

Any new class would have to have a identical formatter to replace this. 
I do not quite see the point of deprecating these functions. It seems to 
that a new presentation object should build on top of the existing 
getfullargspec, when it is requested.

I agree with Stephen that building the seldom-needed redundant 
representation upon creation of every function object is a bad idea.

-- 
Terry Jan Reedy