In python, you can view enum values using the dir function.

from pynput import keyboard
print(dir(keyboard.Key))  # show full enum list

Output

['__class__', '__doc__', '__members__', '__module__', 'alt', 'alt_l', 'alt_r', 
 'backspace', 'caps_lock', 'cmd', 'cmd_r', 'ctrl', 'ctrl_l', 'ctrl_r', 'delete', 
 'down', 'end', 'enter', 'esc', 'f1', 'f10', 'f11', 'f12', 'f13', 'f14', 'f15', 
 'f16', 'f17', 'f18', 'f19', 'f2', 'f20', 'f3', 'f4', 'f5', 'f6', 'f7', 'f8', 'f9',
 'home', 'insert', 'left', 'media_next', 'media_play_pause', 'media_previous', 
 'media_volume_down', 'media_volume_mute', 'media_volume_up', 'menu', 'num_lock', 
 'page_down', 'page_up', 'pause', 'print_screen', 'right', 'scroll_lock', 'shift', 
 'shift_r', 'space', 'tab', 'up']

You can see up, down, left, right in the list. Try those keys.

I think you're looking for pynput.keyboard.Listener, which allows you to monitor the keyboard and to take different actions depending on the key that is pressed. It is available for Python 2.7.

This example is a good way to get started:

from pynput import keyboard

def on_press(key):
    try:
        print('alphanumeric key {0} pressed'.format(
            key.char))
    except AttributeError:
        print('special key {0} pressed'.format(
            key))

def on_release(key):
    print('{0} released'.format(
        key))
    if key == keyboard.Key.esc:
        # Stop listener
        return False

# Collect events until released
with keyboard.Listener(
        on_press=on_press,
        on_release=on_release) as listener:
    listener.join()

# ...or, in a non-blocking fashion:
listener = keyboard.Listener(
    on_press=on_press,
    on_release=on_release)
listener.start()