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.string tensor.
 | 
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).
 |