list_manipulator

from collections import deque


def list_manipulator(any_list, *args):
    command = args[0]
    position = args[1]
    nums = [int(n) for n in args[2:]]
    any_list = deque(any_list)
    if command == 'add' and position == 'beginning':
        any_list.extendleft(reversed(nums))
    elif command == 'add' and position == 'end':
        any_list.extend(nums)
    elif command == 'remove' and position == 'beginning':
        if nums:
            for _ in range(*nums):
                any_list.popleft()
        else:
            any_list.popleft()
    elif command == 'remove' and position == 'end':
        if nums:
            for _ in range(*nums):
                any_list.pop()
        else:
            any_list.pop()
    return list(any_list)


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))