pastebin

diff_hist = [0,10,20,30,40]

prev = 0

accum_hist = []

for i in diff_hist:

    prev = prev + i

    accum_hist.append(prev)

 

print (accum_hist)

 

accum_hist2 = [sum(diff_hist[:i]) for i in range(len(diff_hist))]

print(accum_hist)