code: def _add_print_to_last_line(code):
      """Add print() to the last line of a string."""
      # 1. check if there is already a print statement
      if "print(" in code:
          return code
      # 2. extract the last line, enclose it in print() and return the new string
      lines = code.splitlines()
      last_line = lines[-1]
      if "\t" in last_line or "=" in last_line:
          return code
      if "=" in last_line:
          last_line = "print(" + last_line.split(" = ")[0] + ")"
          lines.append(last_line)
      else:
          lines[-1] = "print(" + last_line + ")"
      # 3. join the lines back together
      return "\n".join(lines)
  
imports: import re
  import os
  from pydantic import BaseModel, Extra, root_validator
  from typing import Any, Callable, Dict, List, Optional, Union, Tuple
  from time import sleep
  from autogen._pydantic import PYDANTIC_V1
  from autogen.agentchat import Agent, UserProxyAgent
  from autogen.code_utils import UNKNOWN, extract_code, execute_code, infer_lang
  from autogen.math_utils import get_answer
label_desc: Use image node_id 2 for calling a global function with example usage: _add_print_to_last_line(code) and returns: str, code, code