Python tensorflow.tuple方法代碼示例

# 需要導入模塊: import tensorflow [as 別名]
# 或者: from tensorflow import tuple [as 別名]
def testWhile_NestedInput(self):
    with self.test_session() as sess:
      named = collections.namedtuple("named", ("a", "b"))
      loop_vars = [named(a=tf.constant(0.0), b=tf.constant(1.0)),
                   (tf.constant(2.0), tf.constant(3.0)),
                   tf.constant(4.0)]
      c = lambda lv0, _1, _2: lv0.a < 100.0
      def b(lv0, lv1, lv2):
        lv0 = named(a=lv0.a + 1, b=lv0.b)
        lv1 = (lv1[0] + 1, lv1[1])
        lv2 += 2
        return [lv0, lv1, lv2]
      r = tf.while_loop(c, b, loop_vars)

      self.assertTrue(isinstance(r, list))
      self.assertTrue(isinstance(r[0], named))
      self.assertTrue(isinstance(r[1], tuple))
      self.assertTrue(isinstance(r[2], tf.Tensor))

      r_flattened = nest.flatten(r)
      self.assertEqual(
          [100.0, 1.0, 102.0, 3.0, 4.0 + 100*2.0],
          sess.run(r_flattened)) 

# 需要導入模塊: import tensorflow [as 別名]
# 或者: from tensorflow import tuple [as 別名]
def _get_state_variables(self, batch_size, cell):
        """For each layer, get the initial state and make a variable out of it
        to enable updating its value.

        Args:
            batch_size (int): Batch size.
            cell (tf.BasicLSTMCell): LSTM cell to get the initial state for.

        Returns:
            tupel: Tupel of the state variables and there zero states.

        """
        # For each layer, get the initial state and make a variable out of it
        # to enable updating its value.
        zero_state = cell.zero_state(batch_size, tf.float32)
        state_variables = []
        for state_c, state_h in zero_state:
            state_variables.append(
                tf.contrib.rnn.LSTMStateTuple(
                    tf.Variable(state_c, trainable=False),
                    tf.Variable(state_h, trainable=False)))
        # Return as a tuple, so that it can be fed to dynamic_rnn as an initial state
        return tuple(state_variables), zero_state 

# 需要導入模塊: import tensorflow [as 別名]
# 或者: from tensorflow import tuple [as 別名]
def _get_state_update_op(self, state_variables, new_states):
        """Add an operation to update the train states with the last state tensors

        Args:
            state_variables (tf.Variable): State variables to be updated
            new_states (tf.Variable): New state of the state variable.

        Returns:
            tf.Operation: Return a tuple in order to combine all update_ops into a
            single operation. The tuple's actual value should not be used.

        """
        # Add an operation to update the train states with the last state tensors
        update_ops = []
        for state_variable, new_state in zip(state_variables, new_states):
            # Assign the new state to the state variables on this layer
            update_ops.extend([
                state_variable[0].assign(new_state[0]),
                state_variable[1].assign(new_state[1])
            ])
        # Return a tuple in order to combine all update_ops into a single operation.
        # The tuple's actual value should not be used.
        return tf.tuple(update_ops) 

# 需要導入模塊: import tensorflow [as 別名]
# 或者: from tensorflow import tuple [as 別名]
def expand_bboxes(xmin, xmax, ymin, ymax, cfg):
    """
    Expand the bboxes.
    """

    w = xmax - xmin
    h = ymax - ymin

    w = w * cfg.WIDTH_EXPANSION_FACTOR
    h = h * cfg.HEIGHT_EXPANSION_FACTOR

    half_w = w / 2.
    half_h = h / 2.

    xmin = tf.clip_by_value(xmin - half_w, 0, 1)
    xmax = tf.clip_by_value(xmax + half_w, 0, 1)
    ymin = tf.clip_by_value(ymin - half_h, 0, 1)
    ymax = tf.clip_by_value(ymax + half_h, 0, 1)

    return tf.tuple([xmin, xmax, ymin, ymax]) 

# 需要導入模塊: import tensorflow [as 別名]
# 或者: from tensorflow import tuple [as 別名]
def _precision_recall(n_gbboxes, n_detections, scores, tp, fp, scope=None):
    """Compute precision and recall from scores, true positives and false
    positives booleans arrays
    """
    # Sort by score.
    with tf.name_scope(scope, 'prec_rec', [n_gbboxes, scores, tp, fp]):
        # Sort detections by score.
        scores, idxes = tf.nn.top_k(scores, k=n_detections, sorted=True)
        tp = tf.gather(tp, idxes)
        fp = tf.gather(fp, idxes)
        # Computer recall and precision.
        dtype = tf.float64
        tp = tf.cumsum(tf.cast(tp, dtype), axis=0)
        fp = tf.cumsum(tf.cast(fp, dtype), axis=0)
        recall = _safe_div(tp, tf.cast(n_gbboxes, dtype), 'recall')
        precision = _safe_div(tp, tp + fp, 'precision')

        return tf.tuple([precision, recall]) 

# 需要導入模塊: import tensorflow [as 別名]
# 或者: from tensorflow import tuple [as 別名]
def _rev_layer_forward(xs, f, g, f_side_input, g_side_input,
                       gate_outputs=False):
  """Forward for 1 reversible layer."""
  x1, x2 = xs
  y1 = x1 + (f(x2, f_side_input) if f_side_input else f(x2))
  y2 = x2 + (g(y1, g_side_input) if g_side_input else g(y1))
  out = (y1, y2)
  if gate_outputs:
    out = tf.tuple(out)
  return out 

# 需要導入模塊: import tensorflow [as 別名]
# 或者: from tensorflow import tuple [as 別名]
def precision_recall(num_gbboxes, tp, fp, scope=None):
    """Compute precision and recall from true positives and false
    positives booleans arrays
    """

    # Sort by score.
    with tf.name_scope(scope, 'precision_recall'):
        # Computer recall and precision.
        tp = tf.reduce_sum(tf.cast(tp, tf.float32), axis=0)
        fp = tf.reduce_sum(tf.cast(fp, tf.float32), axis=0)
        recall = tfe_math.safe_divide(tp, tf.cast(num_gbboxes, tf.float32), 'recall')
        precision = tfe_math.safe_divide(tp, tp + fp, 'precision')
        return tf.tuple([precision, recall]) 

# 需要導入模塊: import tensorflow [as 別名]
# 或者: from tensorflow import tuple [as 別名]
def configure_gcs(credentials=None, block_cache=None, device=None):
  """Configures the GCS file system for a given a session.

  Warning: GCS `credentials` may be transmitted over the network unencrypted.
  Please ensure that the network is trusted before using this function. For
  users running code entirely within Google Cloud, your data is protected by
  encryption in between data centers. For more information, please take a look
  at https://cloud.google.com/security/encryption-in-transit/.

  Args:
    credentials: [Optional.] A JSON string
    block_cache: [Optional.] A BlockCacheParams to configure the block cache .
    device: [Optional.] The device to place the configure ops.
  """
  def configure(credentials, block_cache):
    """Helper function to actually configure GCS."""
    if credentials:
      if isinstance(credentials, dict):
        credentials = json.dumps(credentials)
      creds = gcs_configure_credentials(credentials)
    else:
      creds = tf.constant(0)

    if block_cache:
      cache = gcs_configure_block_cache(
          max_cache_size=block_cache.max_bytes,
          block_size=block_cache.block_size,
          max_staleness=block_cache.max_staleness)
    else:
      cache = tf.constant(0)

    return tf.tuple([creds, cache])

  if device:
    with ops.device(device):
      return configure(credentials, block_cache)
  return configure(credentials, block_cache) 

# 需要導入模塊: import tensorflow [as 別名]
# 或者: from tensorflow import tuple [as 別名]
def minimize(self, loss, variables=None):
    """"""
    
    variables = variables or tf.trainable_variables()
    gradients = tf.gradients(loss, variables,
                             colocate_gradients_with_ops=True,
                             gate_gradients=True,
                             aggregation_method=2)
    gradients = {variable: gradient for variable, gradient in zip(variables, gradients) if gradient is not None}
    
    variable_steps = {}
    variable_indices = {}
    updates = [tf.assign_add(self.global_step, 1)]
    for variable, gradient in six.iteritems(gradients):
      if isinstance(gradient, tf.Tensor):
        step, update = self.dense_update(gradient, variable)
        variable_steps[variable] = step
        updates.extend(update)
      else:
        step, indices, update = self.sparse_update(gradient, variable)
        variable_steps[variable] = step
        variable_indices[variable] = indices
        updates.extend(update)
    
    variable_steps = self.clip_by_global_norm(variable_steps)
    
    for variable, step in six.iteritems(variable_steps):
      if variable in variable_indices:
        indices = variable_indices[variable]
        updates.append(tf.scatter_sub(variable, indices, step))
      else:
        updates.append(tf.assign_sub(variable, step))
    
    return tf.tuple(updates)[0]
  
  #============================================================= 

# 需要導入模塊: import tensorflow [as 別名]
# 或者: from tensorflow import tuple [as 別名]
def average_precision(
        num_gt_boxes,
        tp,
        fp,
        score,
        class_name,
        metrics_collections=None,
        updates_collections=None,
):
    """Compute average precision.

    Args:
        num_gt_boxes(tf.Tensor): a scalar tensor. number of gt boxes.
        tp(tf.Tensor): tp vector. elements are int or bool.
        fp(tf.Tensor): fp vector. elements are int or bool.
        score(tf.Tensor): score vector.
        class_name(str): class_name

    Return:
        average precision(tf.Tensor): scalar
        presicion_array(tf.Tensor): vector of presicion.
        recall_array(tf.Tensor): vector of recall.
        presicion(tf.Tensor): scalr of presicion.
        recall(tf.Tensor): scalar of recall.
    """
    # replace non-alpha-num string.
    class_name = re.sub('[^0-9a-zA-Z]+', '_', class_name)

    (tp_value, fp_value, scores_value, num_gt_boxes_value), update_op = \
        _streaming_tp_fp_array(num_gt_boxes, tp, fp, score, class_name,
                               metrics_collections=metrics_collections, updates_collections=updates_collections)

    precision_array, recall_array, precision, recall = \
        _precision_recall(tp_value, fp_value, scores_value, num_gt_boxes_value, class_name)

    average_precision = _average_precision(precision_array, recall_array)

    return tf.tuple([average_precision, precision_array, recall_array, precision, recall]), update_op 

# 需要導入模塊: import tensorflow [as 別名]
# 或者: from tensorflow import tuple [as 別名]
def _precision_recall(
        tp,
        fp,
        scores,
        num_gt_boxes,
        class_name,
        dtype=tf.float64,
        scope=None):
    """Compute precision and recall from scores, true positives and false
    positives booleans arrays
    """
    default_name = 'precision_recall_{}'.format(class_name)
    # Sort by score.
    with tf.compat.v1.name_scope(scope, default_name, [num_gt_boxes, tp, fp, scores]):
        num_detections = tf.size(scores)
        # Sort detections by score.
        scores, idxes = tf.nn.top_k(scores, k=num_detections, sorted=True)
        tp = tf.gather(tp, idxes)
        fp = tf.gather(fp, idxes)
        # Computer recall and precision.
        tp = tf.cumsum(tf.cast(tp, dtype), axis=0)
        fp = tf.cumsum(tf.cast(fp, dtype), axis=0)

        recall = _safe_div_ones(tp, tf.cast(num_gt_boxes, dtype), 'recall')
        precision = _safe_div_zeros(tp, tp + fp, 'precision')

        scalar_precision = tf.cond(
            tf.equal(tf.size(precision), 0),
            true_fn=lambda: tf.constant(0, dtype=dtype),
            false_fn=lambda: precision[-1],
            name="scalar_precision"
        )

        scalar_recall = tf.cond(
            tf.equal(tf.size(recall), 0),
            true_fn=lambda: tf.constant(0, dtype=dtype),
            false_fn=lambda: recall[-1],
            name="scalar_recall"
        )

        return tf.tuple([precision, recall, scalar_precision, scalar_recall]) 

# 需要導入模塊: import tensorflow [as 別名]
# 或者: from tensorflow import tuple [as 別名]
def stop_gradient_tuple(self, inputs):
        """ Stop gradients through tf.tuple. """
        for i, _ in enumerate(inputs):
            inputs[i] = tf.stop_gradient(inputs[i])
        return inputs 

# 需要導入模塊: import tensorflow [as 別名]
# 或者: from tensorflow import tuple [as 別名]
def create_bbox_batch(cls, inputs, batch_size=64):
        """ Create batch indices for bboxes. """
        batch = []
        for indices in inputs:
            indices = tf.random_shuffle(indices)
            start = [0] * 2
            size = [tf.minimum(batch_size, tf.shape(indices)[0]), -1]
            sample = tf.slice(indices, start, size)
            sample.set_shape([None, 1])
            batch.append(sample)
        batch = tf.tuple(batch)
        return batch 

# 需要導入模塊: import tensorflow [as 別名]
# 或者: from tensorflow import tuple [as 別名]
def _get_rois_and_labels(self, rois, labels, indices):
        with tf.variable_scope('get_rois_and_labels'):
            output_rois = []
            output_labels = []
            for i, index in enumerate(indices):
                output_rois.append(tf.gather_nd(rois[i], index))
                output_labels.append(tf.gather_nd(labels[i], index))
            output_rois = tf.tuple(output_rois)
            output_labels = tf.tuple(output_labels)
        return output_rois, output_labels 

# 需要導入模塊: import tensorflow [as 別名]
# 或者: from tensorflow import tuple [as 別名]
def _unstack_tuple(self, inputs, tensor_sizes):
        size = len(tensor_sizes)
        start_position = tf.constant(0)
        output = []
        dim = len(inputs.get_shape().as_list())-1
        for i in range(size):
            output.append(tf.slice(inputs, begin=[start_position, *([0]*dim)], size=[tensor_sizes[i], *([-1]*dim)]))
            start_position = start_position + tensor_sizes[i]
        return tf.tuple(output)