class_docstr: Argparse Action class to read from file. 
code: def __call__(self, parser, namespace, values, option_string=None):
      with values as _file:
          options = []
          for line in _file.read().splitlines():
              if len(line) <= 2 or line[0:2] != "--":
                  continue
              args_ = line.split()
              if len(args_) <= 1:
                  continue
              options.extend(args_[0:2])
          parser.parse_args(options, namespace)
  
file_path: dragonfly/dragonfly/utils/option_handler.py
imports: import argparse
  from copy import deepcopy
label_desc: Use image node_id 1 for calling the LoadFromFile obj's underlying member method code with example usage: obj.__call__(parser, namespace, values, option_string) without return types