Python list group and sum with more fields

Question

I have a list with two integer fields which I would like to sum (string,integer, integer)

myList= [[[\"26-07-2017\",2,0], [\"26-07-2017\",3,0], [\"27-07-2017\",         


        

Answer 1

You can use dict to store your unique dates and sum of the values

Code:

myList= [[["26-07-2017",2,0], ["26-07-2017",3,0], ["27-07-2017",1,0], ["27-07-2017",0,1]]]
dic = {}
for x in myList[0]:
    try:
        dic[x[0]][0] = dic[x[0]][0]+x[1]
        dic[x[0]][1] = dic[x[0]][1] + x[2]
    except:
        dic[x[0]] = [x[1], x[2]]
[[k,v[0], v[1]]for k,v in dic.items()]

Output:

[['26-07-2017', 5, 0], ['27-07-2017', 1, 1]]