Access to items across list in python or vb in grasshopper

[athibanbalaji1997]

In the list shown above i want to add each number to all previous numbers in the list (Like a cumulative addition)
I am new into scripting in grasshopper.
Any help is appreciated.Thanks

[Baris]

Have a look at the mass addition component

[Dancergraham (Graham Knapp)]

In Python you would do this:

a=[sum(x[:i+1]) for i in range(len(x))]

[Dancergraham (Graham Knapp)]

Sorry ! I missed the +1 - corrected above!