mutating.py

def double_input_preserved(list,index):
    new_list = list[:index] + [list[index]*2] + list[index + 1:]
    return new_list

def double_changes_input(list, index):
    list[index] *= 2
    return list


print("preservered")
list1 = [2,5,41,-5]
print(list1)
list2 = double_input_preserved(list1, 3)
print(list1)
print(list2)

print("mutating")
list3 = [2,5,41,-5]
print(list3)
list4 = double_changes_input(list3, 3)
print(list3)
print(list4)