import asyncio
import os
from evdev import InputDevice, categorize, ecodes

dev = InputDevice('/dev/input/event0')

async def scanner(dev):
  async for ev in dev.async_read_loop():
    if ev.type == ecodes.EV_KEY:
      if ev.code in [ecodes.KEY_PLAYCD, ecodes.KEY_PAUSECD] and ev.value == 0:
        print("Play/Pause Pressed")
        os.system("pactl set-sink-mute @DEFAULT_SINK@ toggle")

loop = asyncio.get_event_loop()
loop.run_until_complete(scanner(dev))