class LinkedList:

class _Node: def __init__(self, item: any, next: '_Node' = None) -> None:

self.item = item self.next = next

def __init__(self, iterable=[]) -> None:

self._first = LinkedList._Node(None)

self._last = self._first

self._num_items = 0

for elem in iterable: self.append(elem)

def __delitem__(self, i: int) -> None:

# complete the method to remove an element at the index of i