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

[Steven D'Aprano]

Larry Hastings wrote:

>> [...]
>> "Changes to the Signature object, or to any of its data members,
>> do not affect the function itself."
>>
>> which leaves the possibility that __signature__ may no longer match 
>> the actual argument spec, for some reason. If you remove 
>> getfullargspec, people will have to reinvent it to deal with such cases.
> 
> There's no reason why they should disagree.  The "some reason" would be 
> if some doorknob decided to change it--the objects are mutable, because 
> there's no good reason to make them immutable.

Nevertheless, the world is full of doorknobs, and people will have to deal 
with their code.

The case for deprecating getfullargspec is weak. The case for deprecating it 
*right now* is even weaker. Let's not rush to throw away working code.


-- 
Steven