maxSubtotalIndex.py

list1 = [10,20,3000,10,-1,12000,-10,20,80,300,100,-30,90,10000]
i = 1
j = 1
maxtotal = 0
index_subset = {}
total = []
result = []
for val in list1:
    
    tempmax= maxtotal+val
    if maxtotal <tempmax:
        maxtotal = tempmax
       
        result.append(maxtotal)
        index_subset[maxtotal] = [i,j]
        
        j = j+1
    else:
        
        maxtotal = 0
        j = j+1
        i = j
        
print index_subset[max(index_subset.keys())]