Insert a node at a specific position in a linked list

# Complete the insertNodeAtPosition function below.

#
# For your reference:
#
# SinglyLinkedListNode:
#     int data
#     SinglyLinkedListNode next
#
#
def insertNodeAtPosition(head, data, position):

    n = head
    for _ in range(position - 1):
        n = n.next
        n_next = n.next
    n.next = SinglyLinkedListNode(data)
    n.next.next = n_next
    return head