Use Python programming language to implement a bubble sort function on a singly linked list by swapping the nodes. You may define functions in the Node class if necessary. Note the function bubble_sort(L) can only take in one parameter, L, the singly linked list.

The node class is given as follows.

class Node: def __init__(self,data=None,next=None): self.data = data self.next = next 

Please use this singly linked list as part of your test code:

L = Node(100,Node(96,Node(95,Node(97,Node(99,Node(98))))))