How to find the cumulative sum of numbers in a list?

Question

time_interval = [4, 6, 12]

I want to sum up the numbers like [4, 4+6, 4+6+12] in order to get the list t = [4, 10, 22].

Answer 1

values = [4, 6, 12]
total  = 0
sums   = []

for v in values:
  total = total + v
  sums.append(total)

print 'Values: ', values
print 'Sums:   ', sums

Running this code gives

Values: [4, 6, 12]
Sums:   [4, 10, 22]