Hi! Seems like a question for python-ideas mailing list, not for python-dev.
On Fri, Apr 29, 2011 at 10:27:46AM -0400, Roy Hyunjin Han wrote:
> It would be convenient if replacing items in a dictionary returns the
> new dictionary, in a manner analogous to str.replace(). What do you
> think?
> ::
>
> # Current behavior
> x = {'key1': 1}
> x.update(key1=3) == None
> x == {'key1': 3} # Original variable has changed
>
> # Possible behavior
> x = {'key1': 1}
> x.replace(key1=3) == {'key1': 3}
> x == {'key1': 1} # Original variable is unchanged
You can implement this in your own subclass of dict, no?
Oleg.
--
Oleg Broytman http://phdru.name/ p...@phdru.name
Programmers don't die, they just GOSUB without RETURN.
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