On Wed, Feb 11, 2015 at 12:35 AM, Ian Lee <ianlee1...@gmail.com> wrote:
> +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) > > > Well looking at just list a + b yields new list a += b yields modified a then there is also .extend in list. etc. so do we want to follow list's footstep? I like + because + is more natural to read. Maybe this needs to be a separate thread. I am actually amazed to remember dict + dict is not possible... there must be a reason (performance??) for this...
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