>> I want to total score..
>> For example
>>>> dict1={1: 4, 3: 5}... and 2 millions element
>>>> dict2={3: 3, 8: 6}... and 3 millions element
>> result should be dict3={1:4, 3:8, 8:6}
>
> Well not sure how this will work with 5+ million elements, but here's
> one stab at it:
>
> >>> dict1={1: 4, 3: 5}
> >>> dict2={3: 3, 8: 6}
> >>> for key in set(dict1.keys() + dict2.keys()):
> ... x = dict1.get(key, 0)
> ... y = dict2.get(key, 0)
> ... dict3[key] = x + y
> ...
> >>> dict3
> {8: 6, 1: 4, 3: 8}
Or if doing it in-place is sufficient, you can use
for k,v in dict2.iteritems():
dict1[k] = dict1.get(k, 0) + v
Or, if you like stupid iterator/comprehension tricks
dict1.update(
(k,dict1.get(k, 0) + v)
for k,v in dict2.iteritems()
)
-tkc
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