code: def __call__(self, parser, namespace, values, option_string=None):
      if getattr(namespace, self.dest) is None:
          setattr(namespace, self.dest, values)
  
file_path: hypertunity/hypertunity/scheduling/tests/script.py
imports: import argparse
  import os
  import pickle
  import sys
label_desc: Use image node_id 1 for calling the DoNotReplaceAction obj's underlying member method code with example usage: obj.__call__(parser, namespace, values, option_string) without return types