[Python-ideas] Adding "+" and "+=" operators to dict

[Greg Ewing]

Eric Snow wrote:
> However, the upside to
> the PEP 448 syntax is that merging could be done without requiring an
> additional intermediate dict.

It can also detect duplicate keywords and give you
a clear error message. The operator would at best
give a rather more generic error message and at
worst silently discard one of the duplicates.

-- 
Greg