Removes all the elements from a linked list python
def deleteAllNodes(self):
#1 & 2. create a temp node, if the head is not
# null make temp as head and move head to head
# next, then delete the temp, continue the
# process till head becomes null
while (self.head != None):
temp = self.head
self.head = self.head.next
temp = None
print("All nodes are deleted successfully.")