Sum list of list elements in python like sql group by [duplicate]

Answer 1

from collections import defaultdict

my_list= [["apple",5],["banana",6],["orange",6],["banana",9],["orange",3],["apple",111]]

result = defaultdict(int)
for fruit, value in my_list:
    result[fruit] += value
result = result.items()

print result

Or you can keep result as dictionary