Function _GetMember

fire/core.py:622–649

Returns a subcomponent of component by consuming an arg from args. Given a starting component and args, this function gets a member from that component, consuming one arg in the process. Args: component: The component from which to get a member. args: Args from which to consume in th

(component, args)

def _GetMember(component, args):
  """Returns a subcomponent of component by consuming an arg from args.

  Given a starting component and args, this function gets a member from that
  component, consuming one arg in the process.

  Args:
    component: The component from which to get a member.
    args: Args from which to consume in the search for the next component.
  Returns:
    component: The component that was found by consuming an arg.
    consumed_args: The args that were consumed by getting this member.
    remaining_args: The remaining args that haven't been consumed yet.
  Raises:
    FireError: If we cannot consume an argument to get a member.
  """
  members = dir(component)
  arg = args[0]
  arg_names = [
      arg,
      arg.replace('-', '_'),  # treat '-' as '_'.
  ]

  for arg_name in arg_names:
    if arg_name in members:
      return getattr(component, arg_name), [arg], args[1:]

  raise FireError('Could not consume arg:', arg)


def _CallAndUpdateTrace(component, args, component_trace, treatment='class',