Python v1.to_int32方法代码示例

# 需要导入模块: from tensorflow.compat import v1 [as 别名]
# 或者: from tensorflow.compat.v1 import to_int32 [as 别名]
def padded_accuracy_topk(predictions,
                         labels,
                         k,
                         weights_fn=common_layers.weights_nonzero):
  """Percentage of times that top-k predictions matches labels on non-0s."""
  with tf.variable_scope("padded_accuracy_topk", values=[predictions, labels]):
    padded_predictions, padded_labels = common_layers.pad_with_zeros(
        predictions, labels)
    weights = weights_fn(padded_labels)
    effective_k = tf.minimum(k,
                             common_layers.shape_list(padded_predictions)[-1])
    _, outputs = tf.nn.top_k(padded_predictions, k=effective_k)
    outputs = tf.to_int32(outputs)
    padded_labels = tf.to_int32(padded_labels)
    padded_labels = tf.expand_dims(padded_labels, axis=-1)
    padded_labels += tf.zeros_like(outputs)  # Pad to same shape.
    same = tf.to_float(tf.equal(outputs, padded_labels))
    same_topk = tf.reduce_sum(same, axis=-1)
    return same_topk, weights 

# 需要导入模块: from tensorflow.compat import v1 [as 别名]
# 或者: from tensorflow.compat.v1 import to_int32 [as 别名]
def rouge_l_fscore(predictions, labels, **unused_kwargs):
  """ROUGE scores computation between labels and predictions.

  This is an approximate ROUGE scoring method since we do not glue word pieces
  or decode the ids and tokenize the output.

  Args:
    predictions: tensor, model predictions
    labels: tensor, gold output.

  Returns:
    rouge_l_fscore: approx rouge-l f1 score.
  """
  outputs = tf.to_int32(tf.argmax(predictions, axis=-1))
  # Convert the outputs and labels to a [batch_size, input_length] tensor.
  outputs = tf.squeeze(outputs, axis=[-1, -2])
  labels = tf.squeeze(labels, axis=[-1, -2])
  rouge_l_f_score = tf.py_func(rouge_l_sentence_level, (outputs, labels),
                               tf.float32)
  return rouge_l_f_score, tf.constant(1.0) 

# 需要导入模块: from tensorflow.compat import v1 [as 别名]
# 或者: from tensorflow.compat.v1 import to_int32 [as 别名]
def rouge_2_fscore(predictions, labels, **unused_kwargs):
  """ROUGE-2 F1 score computation between labels and predictions.

  This is an approximate ROUGE scoring method since we do not glue word pieces
  or decode the ids and tokenize the output.

  Args:
    predictions: tensor, model predictions
    labels: tensor, gold output.

  Returns:
    rouge2_fscore: approx rouge-2 f1 score.
  """

  outputs = tf.to_int32(tf.argmax(predictions, axis=-1))
  # Convert the outputs and labels to a [batch_size, input_length] tensor.
  outputs = tf.squeeze(outputs, axis=[-1, -2])
  labels = tf.squeeze(labels, axis=[-1, -2])
  rouge_2_f_score = tf.py_func(rouge_n, (outputs, labels), tf.float32)
  return rouge_2_f_score, tf.constant(1.0) 

# 需要导入模块: from tensorflow.compat import v1 [as 别名]
# 或者: from tensorflow.compat.v1 import to_int32 [as 别名]
def __init__(self, pad_mask):
    """Compute and store the location of the padding.

    Args:
      pad_mask (tf.Tensor): Reference padding tensor of shape
        [batch_size,length] or [dim_origin] (dim_origin=batch_size*length)
        containing non-zeros positive values to indicate padding location.
    """
    self.nonpad_ids = None
    self.dim_origin = None

    with tf.name_scope("pad_reduce/get_ids"):
      pad_mask = tf.reshape(pad_mask, [-1])  # Flatten the batch
      # nonpad_ids contains coordinates of zeros rows (as pad_mask is
      # float32, checking zero equality is done with |x| < epsilon, with
      # epsilon=1e-9 as standard, here pad_mask only contains positive values
      # so tf.abs would be redundant)
      self.nonpad_ids = tf.to_int32(tf.where(pad_mask < 1e-9))
      self.dim_origin = tf.shape(pad_mask)[:1] 

# 需要导入模块: from tensorflow.compat import v1 [as 别名]
# 或者: from tensorflow.compat.v1 import to_int32 [as 别名]
def bleu_score(predictions, labels, **unused_kwargs):
  """BLEU score computation between labels and predictions.

  An approximate BLEU scoring method since we do not glue word pieces or
  decode the ids and tokenize the output. By default, we use ngram order of 4
  and use brevity penalty. Also, this does not have beam search.

  Args:
    predictions: tensor, model predictions
    labels: tensor, gold output.

  Returns:
    bleu: int, approx bleu score
  """
  outputs = tf.to_int32(tf.argmax(predictions, axis=-1))
  # Convert the outputs and labels to a [batch_size, input_length] tensor.
  outputs = tf.squeeze(outputs, axis=[-1, -2])
  labels = tf.squeeze(labels, axis=[-1, -2])

  bleu = tf.py_func(compute_bleu, (labels, outputs), tf.float32)
  return bleu, tf.constant(1.0) 

# 需要导入模块: from tensorflow.compat import v1 [as 别名]
# 或者: from tensorflow.compat.v1 import to_int32 [as 别名]
def noise_from_step_num():
  """Quantization noise equal to (phi * (step_num + 1)) mod 1.0.

  Not using random_uniform here due to a problem on TPU in that random seeds
  are not respected, which may cause the parameters on different replicas
  to go out-of-sync.

  Returns:
    a float32 scalar
  """
  step = tf.to_int32(tf.train.get_or_create_global_step()) + 1
  phi = ((5 ** 0.5) - 1) / 2
  # Naive computation tf.mod(phi * step, 1.0) in float32 would be disastrous
  # due to loss of precision when the step number gets large.
  # Computation in doubles does not work on TPU, so we use this complicated
  # alternative computation which does not suffer from these roundoff errors.
  ret = 0.0
  for i in range(30):
    ret += (((phi * (2 ** i)) % 1.0)  # double-precision computation in python
            * tf.to_float(tf.mod(step // (2 ** i), 2)))
  return tf.mod(ret, 1.0) 

# 需要导入模块: from tensorflow.compat import v1 [as 别名]
# 或者: from tensorflow.compat.v1 import to_int32 [as 别名]
def xception_exit(inputs):
  """Xception exit flow."""
  with tf.variable_scope("xception_exit"):
    x = inputs
    x_shape = x.get_shape().as_list()
    if x_shape[1] is None or x_shape[2] is None:
      length_float = tf.to_float(tf.shape(x)[1])
      length_float *= tf.to_float(tf.shape(x)[2])
      spatial_dim_float = tf.sqrt(length_float)
      spatial_dim = tf.to_int32(spatial_dim_float)
      x_depth = x_shape[3]
      x = tf.reshape(x, [-1, spatial_dim, spatial_dim, x_depth])
    elif x_shape[1] != x_shape[2]:
      spatial_dim = int(math.sqrt(float(x_shape[1] * x_shape[2])))
      if spatial_dim * spatial_dim != x_shape[1] * x_shape[2]:
        raise ValueError("Assumed inputs were square-able but they were "
                         "not. Shape: %s" % x_shape)
      x = tf.reshape(x, [-1, spatial_dim, spatial_dim, x_depth])

    x = common_layers.conv_block_downsample(x, (3, 3), (2, 2), "SAME")
    return tf.nn.relu(x) 

# 需要导入模块: from tensorflow.compat import v1 [as 别名]
# 或者: from tensorflow.compat.v1 import to_int32 [as 别名]
def bytenet_internal(inputs, targets, hparams):
  """ByteNet, main step used for training."""
  with tf.variable_scope("bytenet"):
    # Flatten inputs and extend length by 50%.
    inputs = tf.expand_dims(common_layers.flatten4d3d(inputs), axis=2)
    extend_length = tf.to_int32(0.5 * tf.to_float(tf.shape(inputs)[1]))
    inputs_shape = inputs.shape.as_list()
    inputs = tf.pad(inputs, [[0, 0], [0, extend_length], [0, 0], [0, 0]])
    inputs_shape[1] = None
    inputs.set_shape(inputs_shape)  # Don't lose the other shapes when padding.
    # Pad inputs and targets to be the same length, divisible by 50.
    inputs, targets = common_layers.pad_to_same_length(
        inputs, targets, final_length_divisible_by=50)
    final_encoder = residual_dilated_conv(inputs, hparams.num_block_repeat,
                                          "SAME", "encoder", hparams)

    shifted_targets = common_layers.shift_right(targets)
    kernel = (hparams.kernel_height, hparams.kernel_width)
    decoder_start = common_layers.conv_block(
        tf.concat([final_encoder, shifted_targets], axis=3),
        hparams.hidden_size, [((1, 1), kernel)],
        padding="LEFT")

    return residual_dilated_conv(decoder_start, hparams.num_block_repeat,
                                 "LEFT", "decoder", hparams) 

# 需要导入模块: from tensorflow.compat import v1 [as 别名]
# 或者: from tensorflow.compat.v1 import to_int32 [as 别名]
def _import_feature(self, features, mesh, key):
    """Import a feature from the features dictionary into a mtf.Tensor.

    Args:
      features: a features dictionary
      mesh: a Mesh
      key: a string

    Returns:
      a mtf.Tensor with dtype int32 and shape self.batch_dims + self.length_dim
    """
    if key not in features:
      return None
    x = tf.to_int32(features[key])
    x = common_layers.expand_squeeze_to_nd(x, 2)
    batch_size = mtf.Shape(self.batch_dims).size
    x = x[:, :self.length_dim.size]
    extra_length = self.length_dim.size - tf.shape(x)[1]
    extra_batch = batch_size - tf.shape(x)[0]
    x = tf.pad(x, [[0, extra_batch], [0, extra_length]])
    mtf_shape = mtf.Shape(self.batch_dims + [self.length_dim])
    x = tf.reshape(x, mtf_shape.to_integer_list)
    return mtf.import_fully_replicated(mesh, x, mtf_shape, name=key) 

# 需要导入模块: from tensorflow.compat import v1 [as 别名]
# 或者: from tensorflow.compat.v1 import to_int32 [as 别名]
def ctc_symbol_loss(top_out, targets, model_hparams, vocab_size, weight_fn):
  """Compute the CTC loss."""
  del model_hparams, vocab_size  # unused arg
  logits = top_out
  with tf.name_scope("ctc_loss", values=[logits, targets]):
    # For CTC we assume targets are 1d, [batch, length, 1, 1] here.
    targets_shape = targets.get_shape().as_list()
    assert len(targets_shape) == 4
    assert targets_shape[2] == 1
    assert targets_shape[3] == 1
    targets = tf.squeeze(targets, axis=[2, 3])
    logits = tf.squeeze(logits, axis=[2, 3])
    targets_mask = 1 - tf.to_int32(tf.equal(targets, 0))
    targets_lengths = tf.reduce_sum(targets_mask, axis=1)
    sparse_targets = tf.keras.backend.ctc_label_dense_to_sparse(
        targets, targets_lengths)
    xent = tf.nn.ctc_loss(
        sparse_targets,
        logits,
        targets_lengths,
        time_major=False,
        preprocess_collapse_repeated=False,
        ctc_merge_repeated=False)
    weights = weight_fn(targets)
    return tf.reduce_sum(xent), tf.reduce_sum(weights) 

# 需要导入模块: from tensorflow.compat import v1 [as 别名]
# 或者: from tensorflow.compat.v1 import to_int32 [as 别名]
def top_1_tpu(inputs):
  """find max and argmax over the last dimension.

  Works well on TPU

  Args:
    inputs: A tensor with shape [..., depth]

  Returns:
    values: a Tensor with shape [...]
    indices: a Tensor with shape [...]
  """
  inputs_max = tf.reduce_max(inputs, axis=-1, keepdims=True)
  mask = tf.to_int32(tf.equal(inputs_max, inputs))
  index = tf.range(tf.shape(inputs)[-1]) * mask
  return tf.squeeze(inputs_max, -1), tf.reduce_max(index, axis=-1) 

# 需要导入模块: from tensorflow.compat import v1 [as 别名]
# 或者: from tensorflow.compat.v1 import to_int32 [as 别名]
def bit_to_int(self, x_bit, num_bits, base=2):
    """Turn x_bit representing numbers bitwise (lower-endian) to int tensor.

    Args:
        x_bit: Tensor containing numbers in a particular base to be
        converted to
        int.
        num_bits: Number of bits in the representation.
        base: Base of the representation.

    Returns:
        Integer representation of this number.
    """
    x_l = tf.stop_gradient(tf.to_int32(tf.reshape(x_bit, [-1, num_bits])))
    # pylint: disable=g-complex-comprehension
    x_labels = [
        x_l[:, i] * tf.to_int32(base)**tf.to_int32(i) for i in range(num_bits)]
    res = sum(x_labels)
    return tf.to_int32(tf.reshape(res, common_layers.shape_list(x_bit)[:-1])) 

# 需要导入模块: from tensorflow.compat import v1 [as 别名]
# 或者: from tensorflow.compat.v1 import to_int32 [as 别名]
def int_to_bit(self, x_int, num_bits, base=2):
    """Turn x_int representing numbers into a bitwise (lower-endian) tensor.

    Args:
        x_int: Tensor containing integer to be converted into base
        notation.
        num_bits: Number of bits in the representation.
        base: Base of the representation.

    Returns:
        Corresponding number expressed in base.
    """
    x_l = tf.to_int32(tf.expand_dims(x_int, axis=-1))
    # pylint: disable=g-complex-comprehension
    x_labels = [
        tf.floormod(
            tf.floordiv(tf.to_int32(x_l),
                        tf.to_int32(base)**i), tf.to_int32(base))
        for i in range(num_bits)]
    res = tf.concat(x_labels, axis=-1)
    return tf.to_float(res) 

# 需要导入模块: from tensorflow.compat import v1 [as 别名]
# 或者: from tensorflow.compat.v1 import to_int32 [as 别名]
def int_to_bit(x_int, num_bits, base=2):
  """Turn x_int representing numbers into a bitwise (lower-endian) tensor.

  Args:
    x_int: Tensor containing integer to be converted into base notation.
    num_bits: Number of bits in the representation.
    base: Base of the representation.

  Returns:
    Corresponding number expressed in base.
  """
  x_l = tf.to_int32(tf.expand_dims(x_int, axis=-1))
  x_labels = [tf.floormod(
      tf.floordiv(tf.to_int32(x_l), tf.to_int32(base)**i), tf.to_int32(base))
              for i in range(num_bits)]
  res = tf.concat(x_labels, axis=-1)
  return tf.to_float(res) 

# 需要导入模块: from tensorflow.compat import v1 [as 别名]
# 或者: from tensorflow.compat.v1 import to_int32 [as 别名]
def serving_input_receiver_fn():
  """Creates an input function for serving."""
  seq_len = FLAGS.max_seq_length
  serialized_example = tf.placeholder(
      dtype=tf.string, shape=[None], name="serialized_example")
  features = {
      "input_ids": tf.FixedLenFeature([seq_len], dtype=tf.int64),
      "input_mask": tf.FixedLenFeature([seq_len], dtype=tf.int64),
      "segment_ids": tf.FixedLenFeature([seq_len], dtype=tf.int64),
  }
  feature_map = tf.parse_example(serialized_example, features=features)
  feature_map["is_real_example"] = tf.constant(1, dtype=tf.int32)
  feature_map["label_ids"] = tf.constant(0, dtype=tf.int32)

  # tf.Example only supports tf.int64, but the TPU only supports tf.int32.
  # So cast all int64 to int32.
  for name in feature_map.keys():
    t = feature_map[name]
    if t.dtype == tf.int64:
      t = tf.to_int32(t)
    feature_map[name] = t

  return tf.estimator.export.ServingInputReceiver(
      features=feature_map, receiver_tensors=serialized_example)