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I suspect performance will not be very good though; creating a set out of each dict then only iterating through the keys means another lookup for the value each time (though relatively fast, still increases the order of the function for scaling)
– Breezer
Commented Feb 16, 2017 at 14:57
3

it all depends on the version of the python we are using. In 3.5 and above {**x,**y} gives the concatenated dictionary
– Rashid Mv
Commented Dec 23, 2017 at 15:50

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