ChargeModelTopologyKey pydantic model openff.interchange.models.ChargeModelTopologyKey[source] Bases: DefaultModel Subclass of TopologyKey for use with charge models only. Fields partial_charge_method (str) this_atom_index (int) field this_atom_index: int [Required] field partial_charge_method: str [Required] property atom_indices: tuple[int, ...] Alias for this_atom_index.