code: def set_default_option(defopt: Dict, opt: Dict) -> Dict:
      """return a dictionary based on the options and if no item from option,
      take it from defopt make a shallow copy to detach the results from defopt
  
      Examples
      --------
      >>> set_default_option({'a': 1, 'b': 2}, {'a': 3})
      {'a': 3, 'b': 2}
  
      Parameters
      ----------
      defopt: dict
          Default options
      opt: dict
          Options
  
      Returns
      -------
      dict
          Merged options
  
      """
      res = copy.copy(defopt)
      res.update(opt)
      return res
  
file_path: deepchem/deepchem/utils/differentiation_utils/misc.py
imports: import contextlib
  import copy
  from typing import Mapping, Callable, Union, Dict, List
label_desc: Use image node_id 1 for calling a global function with example usage: set_default_option(defopt, opt) and returns: res