[Python] Polars - How to add two series that contain lists as elements

Trying to add, subtract, two Series that contains datatype List[i64]. The operation seems to be not supported.

a = pl.Series("a",[[1,2],[2,3]])
b = pl.Series("b",[[4,5],[6,7]])
c = a+b


this gives the error:

PanicException: `add` operation not supported for dtype `list[i64]`


I would expect a element-wise sum, like would happen with numpy array for example:

c = [[5,7],[8,10]]


What's the correct syntax to add two series of lists?

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