# tf_agents.utils.nest_utils.assert_same_structure

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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/utils/nest_utils.py#L64-L135) |

Same as tf.nest.assert_same_structure but with cleaner error messages.

    tf_agents.utils.nest_utils.assert_same_structure(
        nest1,
        nest2,
        check_types: bool = True,
        expand_composites: bool = False,
        allow_shallow_nest1: bool = False,
        message: Optional[Text] = None
    ) -> None

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| ## Args ||
|---|---|
| `nest1` | an arbitrarily nested structure. |
| `nest2` | an arbitrarily nested structure. |
| `check_types` | if `True` (default) types of sequences are checked as well, including the keys of dictionaries. If set to `False`, for example a list and a tuple of objects will look the same if they have the same size. Note that namedtuples with identical name and fields are always considered to have the same shallow structure. Two types will also be considered the same if they are both list subtypes (which allows "list" and "_ListWrapper" from trackable dependency tracking to compare equal). |
| `expand_composites` | If true, then composite tensors such as [`tf.SparseTensor`](https://www.tensorflow.org/api_docs/python/tf/sparse/SparseTensor) and [`tf.RaggedTensor`](https://www.tensorflow.org/api_docs/python/tf/RaggedTensor) are expanded into their component tensors. |
| `allow_shallow_nest1` | If `True`, `nest1` is allowed to be more shallow than `nest2`. |
| `message` | Optional error message to provide in case of failure. |

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| ## Raises ||
|---|---|
| `ValueError` | If the two structures do not have the same number of elements or if the two structures are not nested in the same way. |
| `TypeError` | If the two structures differ in the type of sequence in any of their substructures. Only possible if `check_types is True`. |

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