code: def main(_):
      names = os.listdir(os.path.join(path, "img_3d_mean"))
      os.mkdir(os.path.join(path, "combined_"))
      for name in names:
          in1 = os.path.join(path, "img", name.split("_")[-1])
          in2 = os.path.join(path, "img_2d_mean", name)
          in3 = os.path.join(path, "img_3d_mean", name)
          cmd = [
              "convert",
              in1,
              in2,
              in3,
              "+append",
              os.path.join(path, "combined_", name),
          ]
          subprocess.call(cmd)
  
label_desc: Use image node_id 1 for calling a global function with example usage: main(_) without return types