Joins all strings into a single string, or joins along an axis.
tf.compat.v1.reduce_join(
    inputs,
    axis=None,
    keep_dims=None,
    separator='',
    name=None,
    reduction_indices=None,
    keepdims=None
)
  This is the reduction operation for the elementwise tf.strings.join op.
tf.strings.reduce_join([['abc','123'],
                        ['def','456']]).numpy()
b'abc123def456'
tf.strings.reduce_join([['abc','123'],
                        ['def','456']], axis=-1).numpy()
array([b'abc123', b'def456'], dtype=object)
tf.strings.reduce_join([['abc','123'],
                        ['def','456']],
                       axis=-1,
                       separator=" ").numpy()
array([b'abc 123', b'def 456'], dtype=object)
  
| Args | |
|---|---|
| inputs | A tf.stringtensor. | 
| axis | Which axis to join along. The default behavior is to join all elements, producing a scalar. | 
| keepdims | If true, retains reduced dimensions with length 1. | 
| separator | a string added between each string being joined. | 
| name | A name for the operation (optional). | 
| Returns | |
|---|---|
| A tf.stringtensor. | 
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Licensed under the Creative Commons Attribution License 4.0.
Code samples licensed under the Apache 2.0 License.
    https://www.tensorflow.org/versions/r2.9/api_docs/python/tf/compat/v1/reduce_join