list_manipulator_2

def list_manipulator(list_, com1, com2, *args):
    result = []
    if com1 == 'remove' and com2 == "end":
        num = args[0] if args else 1
        result = list_[:-num]
    elif com1 == 'remove':
        num = args[0] if args else 1
        result = list_[num:]
    elif com1 == 'add' and com2 == 'end':
        result = list_ + list(args)
    elif com1 == 'add':
        result = list(args) + list_
    return result


print(list_manipulator([1,2,3], "remove", "end"))
print(list_manipulator([1,2,3], "remove", "beginning"))
print(list_manipulator([1,2,3], "add", "beginning", 20))
print(list_manipulator([1,2,3], "add", "end", 30))
print(list_manipulator([1,2,3], "remove", "end", 2))
print(list_manipulator([1,2,3], "remove", "beginning", 2))
print(list_manipulator([1,2,3], "add", "beginning", 20, 30, 40))
print(list_manipulator([1,2,3], "add", "end", 30, 40, 50))