code: def clean_df(df):
      if "Wall-Clock Time" in df.keys():
          df.drop(["Wall-Clock Time"], 1, inplace=True)
      return df
  
imports: import argparse
  import glob
  import os
  import shutil
  import subprocess
  import multiprocessing
  import sys
  import signal
  import pandas
  import time
  from configparser import ConfigParser
  from importlib import import_module
  from os import path
  from rl_coach.logger import screen
label_desc: Use image node_id 3 for calling a global function with example usage: clean_df(df) and returns: df