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Category：Languages

Say I have list `list_a = [100, 5, 1, 2, 200, 3, 1, 300, 6, 6]`

and and another list `ind_list = [0, 4, 7]`

I want to create a third list that will contain the cumulative sum of the first list which "resets" on every index from `ind_list`

.

To clarify, the result should be `res_list = [100, 105, 106, 108, 200, 203, 204, 300, 306, 312]`

Any help would be appreciated.

how about:

`cs= np.cumsum(list_a) for i in ind_list: if i==0: continue cs[i:]-=cs[i-1] `

result:

`cs >>array([100, 105, 106, 108, 200, 203, 204, 300, 306, 312]) `