# tf_agents.specs.bandit_spec_utils.drop_arm_observation

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| [![](https://www.tensorflow.org/images/GitHub-Mark-32px.png) View source on GitHub](https://github.com/tensorflow/agents/blob/v0.19.0/tf_agents/specs/bandit_spec_utils.py#L108-L112) |

Drops the per-arm observation from a given trajectory/trajectory spec.

    tf_agents.specs.bandit_spec_utils.drop_arm_observation(
        trajectory: https://www.tensorflow.org/agents/api_docs/python/tf_agents/typing/types#Trajectory
    ) -> https://www.tensorflow.org/agents/api_docs/python/tf_agents/typing/types#Trajectory