code: def dataframe_checksum(df: pd.DataFrame):
      checksum = str_checksum(df.to_json())
      return checksum
  
imports: import os
  import time
  from abc import ABC
  from pathlib import Path
  import hashlib
  import typing
  import pandas
  import walrus
  from mindsdb.utilities.config import Config
  from mindsdb.utilities.json_encoder import CustomJSONEncoder
  from mindsdb.interfaces.storage.fs import FileLock
  from mindsdb.utilities.context import context
label_desc: Use image node_id 1 for calling a global function with example usage: dataframe_checksum(df) and returns: checksum