python combine two lists different length code example

Example 1: how to combine 2 lists in python

l1 = [1,2,3,4]
l2 = [1,1,1,1]
l3 = [l1[x//2] if x % 2 == 0 else l2[x//2] for x in range(8)]
// l3: [1, 2, 3, 4, 5, 6, 7, 8]

Example 2: how to concatenate two lists in python

listone = [1,2,3]
listtwo = [4,5,6]

joinedlist = listone + listtwo