code: def get_base_dir():
      return os.path.abspath(
          os.path.join(
              os.path.dirname(os.path.abspath(__file__)),
              os.pardir,
              os.pardir,
              os.pardir,
              os.pardir,
          )
      )
  
label_desc: Use image node_id 1 for calling a global function with example usage: get_base_dir() and returns: os