python - Adding values of a key, based on the similarity of other key -

so have list of python dictionary this:

[{"word": 'app idea', "post" : 'i had app idea', "likes" : 22}, {"word": 'app idea', "post" : 'this great app idea', "likes" : 29}, {"word": 'app development', "post" : 'let start our app development', "likes" : 32}, {"word": 'app development', "post" : 'app development take time', "likes" : 23}, {"word": 'app data', "post" : 'delete app data', "likes" : 32}] 

i want add likes word same

so final output looks this

[{"word": 'app idea',  "likes" : 51}, {"word": 'app development',  "likes" : 55}, {"word": 'app data',  "likes" : 32}] 

in 1 line, using itertools.groupby, dictionary & list comprehension

• group dicts value of word key
• rebuild dicts using sum of likes values , value of word key, using dict comprehension in list comprehension

code:

list_of_dicts = [{"word": 'app idea', "post" : 'i had app idea', "likes" : 22}, {"word": 'app idea', "post" : 'this great app idea', "likes" : 29}, {"word": 'app development', "post" : 'let start our app development', "likes" : 32}, {"word": 'app development', "post" : 'app development take time', "likes" : 23}, {"word": 'app data', "post" : 'delete app data', "likes" : 32}]  import itertools  result = [{"word":k,"likes":sum(v["likes"] v in vl)} k,vl in itertools.groupby(list_of_dicts,key=lambda k : k["word"])] 

result:

[{'word': 'app idea', 'likes': 51}, {'word': 'app development', 'likes': 55}, {'word': 'app data', 'likes': 32}]