join three lists python code example

Example 1: python compine multiple lists

import itertools
ab = itertools.chain(['it'], ['was'], ['annoying'])
list(ab)

Example 2: join lists python

first_list = ["1", "2"]
second_list = ["3", "4"]

# Multiple ways to do this:
first_list += second_list
first_list = first_list + second_list
first_list.extend(second_list)