Question: ( Python ) Define a function makeTwoWay that expects a singly linked structure as its argument. The function builds and returns a doubly linked structure

(Python) Define a function makeTwoWay that expects a singly linked structure as its argument. The function builds and returns a doubly linked structure that contains the items in the singly linked structure. (Note: The function should not alter the arguments structure.)
def makeTwoWay(head):

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