Python generator that can do cumulative sum of the previous elements

I am working with Python3 and trying to create a oneliner that creates a generator that can return the cumulative sum of members of a list.

For example, given the list [1, 2, 3, 4], the generator expression should return 1, 3, 6, 10 in each call to next.

I know how to do this with several lines of code. I would like to find a way to do it as a Python oneliner. The problem I find is how to access the previous values.

source https://stackoverflow.com/questions/73778080/python-generator-that-can-do-cumulative-sum-of-the-previous-elements

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