code: def __enter__(self):
      self.save_dir = os.getcwd()
      os.chdir(self.target_dir)
  
imports: from __future__ import print_function
  import argparse
  import os
  import re
  import shutil
  import subprocess
  import sys
  import tempfile
label_desc: Use image node_id 2 for calling the Cwd obj's underlying member method code with example usage: obj.__enter__() without return types