[Python-ideas] Allow using ** twice

[Serhiy Storchaka]

07.06.13 13:27, yoav glazner написав(ла):
> ChainMap does not return a copy its a view

This is its advantage. As many functions and methods in Python 3 return 
view or iterator instead of a copy. You always can get a dict with 
explicit constructor: dict(ChainMap(...)).