CODE EXAMPLE FOR PYTHON

chain lists

# chain lists
import itertools
st1 = [1,2,3,4,5]
st2 = [ ' A ', ' B ', ' C', ' D ' ]
chain_list = itertools.chain(st1, st2)
print(list(chain_list))					# [1, 2, 3, 4, 5, ' A ', ' B ', ' C ', ' D ' ]