[Python-ideas] Allow using ** twice

[Oscar Benjamin]

On 6 June 2013 16:08, Zachary Ware <zachary.ware+pyideas at gmail.com> wrote:
>> However you can make a class that will try several mappings sequentially e.g.:
>
> That sounds rather like collections.ChainMap.

So it does. Thanks for pointing this out; I wasn't aware of it. So as
of PYthon 3.3 you can do:

from collections import ChainMap

func(**ChainMap(dict1, dict2))

Although this does not have the behaviour suggested by the OP (an
error when a key is duplicated).


Oscar