As I can solve this exercise without having ...

Question

.. to add the item None of the end list and continue to use iter and next

from random import randint
A = [x for x in range(1,9) if randint(0,2) == 1]+[None]
B = [x for x in range(1,9) if x not in A]+[None]
print(A,B)

iA, iB = iter(A), iter(B)
i,j = next (iA), next(iB)
C = []
while (i != None and j != None):
if (i < j):
C.append(i)
i = next(iA)
else:
C.append(j)
j = next(iB)

for i in iA:
C.append(i)
for j in iB:
C.append(j)

C.remove(None)
print (C)

Answer 1

If you do it this way, not using None requires you to use the try/except construct to catch the StopIteration exception that is raised after the end of the iteration. So you need to learn how to do that

Answer 2

@Amaras, Ready !!!.. Thanks you..

https://code.sololearn.com/c1CHWgpJRgYI