|---| | [ View source on GitHub](https://github.com/tensorflow/agents/blob/v0.19.0/tf_agents/utils/object_identity.py#L194-L240) | Like the built-in set, but compares objects with "is". tf_agents.utils.object_identity.ObjectIdentitySet( *args ) ## Methods ### `add` [View source](https://github.com/tensorflow/agents/blob/v0.19.0/tf_agents/utils/object_identity.py#L215-L216) add( key ) Add an element. ### `clear` [View source](https://github.com/tensorflow/agents/blob/v0.19.0/tf_agents/utils/object_identity.py#L221-L222) clear() This is slow (creates N new iterators!) but effective. ### `difference` [View source](https://github.com/tensorflow/agents/blob/v0.19.0/tf_agents/utils/object_identity.py#L229-L232) difference( items ) ### `discard` [View source](https://github.com/tensorflow/agents/blob/v0.19.0/tf_agents/utils/object_identity.py#L212-L213) discard( key ) Remove an element. Do not raise an exception if absent. ### `intersection` [View source](https://github.com/tensorflow/agents/blob/v0.19.0/tf_agents/utils/object_identity.py#L224-L227) intersection( items ) ### `isdisjoint` isdisjoint( other ) Return True if two sets have a null intersection. ### `pop` pop() Return the popped value. Raise KeyError if empty. ### `remove` remove( value ) Remove an element. If not a member, raise a KeyError. ### `update` [View source](https://github.com/tensorflow/agents/blob/v0.19.0/tf_agents/utils/object_identity.py#L218-L219) update( items ) ### `__and__` __and__( other ) ### `__contains__` [View source](https://github.com/tensorflow/agents/blob/v0.19.0/tf_agents/utils/object_identity.py#L209-L210) __contains__( key ) ### `__eq__` __eq__( other ) Return self==value. ### `__ge__` __ge__( other ) Return self\>=value. ### `__gt__` __gt__( other ) Return self\>value. ### `__iter__` [View source](https://github.com/tensorflow/agents/blob/v0.19.0/tf_agents/utils/object_identity.py#L237-L240) __iter__() ### `__le__` __le__( other ) Return self\<=value. ### `__len__` [View source](https://github.com/tensorflow/agents/blob/v0.19.0/tf_agents/utils/object_identity.py#L234-L235) __len__() ### `__lt__` __lt__( other ) Return self\