code: def get_default_kwargs(func):
      """Get the default values of the input function.
  
      Examples:
          >>> def func(a, b=3):  pass
          >>> get_default_kwargs(func)
          {'b': 3}
  
      """
  
      def yaml_serializable(value):
          # isinstance(x, tuple) includes namedtuple, so type is used here
          if type(value) is tuple:
              return yaml_serializable(list(value))
          elif isinstance(value, set):
              return yaml_serializable(list(value))
          elif isinstance(value, dict):
              if not all(isinstance(k, str) for k in value):
                  return Invalid
              retval = {}
              for k, v in value.items():
                  v2 = yaml_serializable(v)
                  # Register only valid object
                  if v2 not in (Invalid, inspect.Parameter.empty):
                      retval[k] = v2
              return retval
          elif isinstance(value, list):
              retval = []
              for v in value:
                  v2 = yaml_serializable(v)
                  # If any elements in the list are invalid,
                  # the list also becomes invalid
                  if v2 is Invalid:
                      return Invalid
                  else:
                      retval.append(v2)
              return retval
          elif value in (inspect.Parameter.empty, None):
              return value
          elif isinstance(
              value, (float, int, complex, bool, str, bytes)
          ):
              return value
          else:
              return Invalid
  
      # params: An ordered mapping of inspect.Parameter
      params = inspect.signature(func).parameters
      data = {p.name: p.default for p in params.values()}
      # Remove not yaml-serializable object
      data = yaml_serializable(data)
      return data
  
label_desc: Use image node_id 1 for calling a global function with example usage: get_default_kwargs(func) and returns: data, yaml_serializable, yaml_serializable, retval, Invalid, retval, value, Invalid, value, Invalid