from Xlib.display import Display
from Xlib.ext.xtest import fake_input
from Xlib import X
from os import environ

_display = Display(environ['DISPLAY'])

def tap(keycode):
   down(keycode)
   up(keycode)

def down(keycode):
   fake_input(_display, X.KeyPress, keycode)
   _display.sync()

def up(keycode):
   fake_input(_display, X.KeyRelease, keycode)
   _display.sync()

def __init_keys__():
   import subprocess 
   _p = subprocess.run(
      "xmodmap -pke".split(),
      capture_output=True,
   )
   assert(_p.returncode == 0)
   stdout = _p.stdout
   result = []
   for line in stdout.split("\n".encode()):
      if line:
         words = line.split()
         key = int(words[1])
         if len(words) < 4:
            result.append(key)
   return result
keys = __init_keys__()