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tf.nest.is_nested
Returns true if its input is a collections.abc.Sequence (except strings).
tf.nest.is_nested(
    seq
)
| Args | |
|---|---|
| seq | an input sequence. | 
| Returns | |
|---|---|
| True if the sequence is a not a string and is a collections.abc.Sequence or a dict. | 
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Code samples licensed under the Apache 2.0 License.
 https://www.tensorflow.org/versions/r2.4/api_docs/python/tf/nest/is_nested