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

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].

I tried the following:

t1 = time_interval[0]
t2 = time_interval[1] + t1
t3 = time_interval[2] + t2
print(t1, t2, t3) # -> 4 10 22

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