code: def get_nested_attribute(obj, attribute):
      
      parent, attr = resolve_nested_attribute(obj, attribute)
      if not parent is None:
          attr_value = getattr(parent, attr)
      else:
          attr_value = None
      return attr_value
docs: Returns the value of the given (possibly dotted) attribute for the given
      object.
  
      If any of the parents on the nested attribute's name path are `None`, the
      value of the nested attribute is also assumed as `None`.
  
      :raises AttributeError: If any attribute access along the attribute path
        fails with an `AttributeError`.