[Python-ideas] add a list.swap() method

[Raymond Hettinger]

[Steven D'Aprano]
> I suggested adding extra functionality to 
> list.__new__, and Nick suggested a new constructor list.from_list(). 
> Nick suggested making from_list destructive, but I don't see the 
> advantage of doing so. I

FWIW, the constructor for list objects already has a fast path 
for copying an input list or tuple.  So the only new thing you can
add is a destructive, steal the pointer approach that breaks 
encapsulation and opens a can of worms. 


Raymond