Generates labels for candidate sampling with a learned unigram distribution.

tf.raw_ops.ThreadUnsafeUnigramCandidateSampler( true_classes, num_true, num_sampled, unique, range_max, seed=0, seed2=0, name=None )

See explanations of candidate sampling and the data formats at go/candidate-sampling.

For each batch, this op picks a single set of sampled candidate labels.

The advantages of sampling candidates per-batch are simplicity and the possibility of efficient dense matrix multiplication. The disadvantage is that the sampled candidates must be chosen independently of the context and of the true labels.

Args | |
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`true_classes` | A `Tensor` of type `int64` . A batch_size * num_true matrix, in which each row contains the IDs of the num_true target_classes in the corresponding original label. |

`num_true` | An `int` that is `>= 1` . Number of true labels per context. |

`num_sampled` | An `int` that is `>= 1` . Number of candidates to randomly sample. |

`unique` | A `bool` . If unique is true, we sample with rejection, so that all sampled candidates in a batch are unique. This requires some approximation to estimate the post-rejection sampling probabilities. |

`range_max` | An `int` that is `>= 1` . The sampler will sample integers from the interval [0, range_max). |

`seed` | An optional `int` . Defaults to `0` . If either seed or seed2 are set to be non-zero, the random number generator is seeded by the given seed. Otherwise, it is seeded by a random seed. |

`seed2` | An optional `int` . Defaults to `0` . An second seed to avoid seed collision. |

`name` | A name for the operation (optional). |

Returns | |
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A tuple of `Tensor` objects (sampled_candidates, true_expected_count, sampled_expected_count). | |

`sampled_candidates` | A `Tensor` of type `int64` . |

`true_expected_count` | A `Tensor` of type `float32` . |

`sampled_expected_count` | A `Tensor` of type `float32` . |

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Licensed under the Creative Commons Attribution License 3.0.

Code samples licensed under the Apache 2.0 License.

https://www.tensorflow.org/versions/r2.4/api_docs/python/tf/raw_ops/ThreadUnsafeUnigramCandidateSampler