PYTHON

Using iterable unpacking operator *

list_1 = [1, 'a']
list_2 = range(2, 4)

list_joined = [*list_1, *list_2]
print(list_joined)

Using iterable unpacking operator * with extend

list_1 = [1, 'a']
list_2 = [1, 2, 3]

list_2.extend(list_1)
print(list_2)