code: def compile_source(source):
      os.system(
          "glslangValidator --stdin -S comp -V -o tmp_kp_shader.comp.spv << END\n"
          + source
          + "\nEND"
      )
      return open("tmp_kp_shader.comp.spv", "rb").read()
  
label_desc: Use image node_id 1 for calling a global function with example usage: compile_source(source) and returns: open