code: def generate_occlum_quote():
      QUOTE_PATH = "/etc/occlum_attestation/quote"
      if not os.path.isfile(QUOTE_PATH):
          print(f"File {QUOTE_PATH} not found.")
          return ""
      with open(QUOTE_PATH, "rb") as f:
          quote = f.read()
      return quote
  
imports: import ctypes
  import base64
  import os
label_desc: Use image node_id 3 for calling a global function with example usage: generate_occlum_quote() and returns: quote, str