code: def keyboard(key, x=0, y=0):
      global mode, scale
      if key == "q":
          sys.exit(0)
      elif key == "I" or key == "i":
          mode = 0
      elif key == "T" or key == "t":
          mode = 1
      elif key == "S" or key == "s":
          mode = 2
      elif key == "D" or key == "d":
          mode = 3
      elif key == "-":
          scale -= 0.1
      elif key == "=":
          scale += 0.1
  
imports: from OpenGL.GL import *
  from OpenGL.GLUT import *
  from OpenGL.GLU import *
  from OpenGL.GL.ARB.vertex_buffer_object import *
  import numpy, Image
  import sys, time, os
  import pycuda.driver
  import pycuda.gl
  import pycuda
  from pycuda.compiler import SourceModule
label_desc: Use image node_id 9 for calling a global function with example usage: keyboard(key, x, y) without return types