[Python-Dev] (no subject)

[Ian Lee]

+1 for adding "+" or "|" operator for merging dicts. To me this operation:

>>> {'x': 1, 'y': 2} + {'z': 3}
{'x': 1, 'y': 2, 'z': 3}

Is very clear.  The only potentially non obvious case I can see then is
when there are duplicate keys, in which case the syntax could just be
defined that last setter wins, e.g.:

>>> {'x': 1, 'y': 2} + {'x': 3}
{'x': 3, 'y': 2}

Which is analogous to the example:

new_dict = dict1.copy()
new_dict.update(dict2)


~ Ian Lee

On Tue, Feb 10, 2015 at 12:11 AM, Serhiy Storchaka <storchaka at gmail.com>
wrote:

> On 10.02.15 04:06, Ethan Furman wrote:
>
>>      return func(*(args + fargs), **{**keywords, **fkeywords})
>>
>
> We don't use [*args, *fargs] for concatenating lists, but args + fargs.
> Why not use "+" or "|" operators for merging dicts?
>
>
>
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