def test_display():
a = Linked_List()
a.display()
a.insert('a')
a.insert(1)
a.display()
assert a.display_prep() == "(1, 'a')"
def test_display():
"""Test Linked_List display method."""
from linked_list import Linked_List
test_list = Linked_List()
test_list.insert(data[0])
test_list.insert(data[1])
assert test_list.display() == "(123, 456)"
curr = head
run = head
for i in range(n):
if run == None:
return None
run = run.next
while run != None:
curr = curr.next
run = run.next
return curr.data
ll = Linked_List()
ll.insert_at_head(1)
ll.insert_at_head(2)
ll.insert_at_head(3)
ll.insert_at_head(4)
ll.insert_at_head(5)
ll.insert_at_head(6)
ll.insert_at_head(7)
ll.insert_at_head(8)
ll.insert_at_head(9)
ll.insert_at_head(10)
ll.display()
print()
print(nth_from_end(ll.head, 3))
