def test_uniquify_str(self):
"""Tests :func:`texar.tf.utils.uniquify_str`.
"""
str_set = ['str']
unique_str = utils.uniquify_str('str', str_set)
self.assertEqual(unique_str, 'str_1')
str_set.append('str_1')
str_set.append('str_2')
unique_str = utils.uniquify_str('str', str_set)
self.assertEqual(unique_str, 'str_3')
def _build_layers(network, layers=None, layer_hparams=None):
"""Builds layers.
Either :attr:`layer_hparams` or :attr:`layers` must be
provided. If both are given, :attr:`layers` will be used.
Args:
network: An instance of a subclass of
:class:`~texar.tf.modules.networks.network_base.FeedForwardNetworkBase`
layers (optional): A list of layer instances.
layer_hparams (optional): A list of layer hparams, each to which
is fed to :func:`~texar.tf.core.layers.get_layer` to create the
layer instance.
"""
with tf.variable_scope(network.variable_scope):
if layers is not None:
network._layers = layers
else:
if layer_hparams is None:
raise ValueError(
'Either `layer` or `layer_hparams` is required.')
network._layers = []
for _, hparams in enumerate(layer_hparams):
network._layers.append(get_layer(hparams=hparams))
for layer in network._layers:
layer_name = uniquify_str(layer.name, network._layer_names)
network._layer_names.append(layer_name)
network._layers_by_name[layer_name] = layer
def append_layer(self, layer):
"""Appends a layer to the end of the network. The method is only
feasible before :attr:`_build` is called.
Args:
layer: A :tf_main:`tf.layers.Layer <layers/Layer>` instance, or
a dict of layer hyperparameters.
"""
if self._built:
raise TexarError("`FeedForwardNetwork.append_layer` can be "
"called only before `_build` is called.")
with tf.variable_scope(self.variable_scope):
layer_ = layer
if not isinstance(layer_, tf.layers.Layer):
layer_ = get_layer(hparams=layer_)
self._layers.append(layer_)
layer_name = uniquify_str(layer_.name, self._layer_names)
self._layer_names.append(layer_name)
self._layers_by_name[layer_name] = layer_
def _build_conv1d_hparams(self, pool_hparams):
"""Creates the hparams for each of the conv layers usable for
:func:`texar.tf.core.layers.get_layer`.
"""
nconv = self._hparams.num_conv_layers
if len(pool_hparams) != nconv:
raise ValueError("`pool_hparams` must be of length %d" % nconv)
filters = _to_list(self._hparams.filters, 'filters', nconv)
if nconv == 1:
kernel_size = _to_list(self._hparams.kernel_size)
if not isinstance(kernel_size[0], (list, tuple)):
kernel_size = [kernel_size]
elif nconv > 1:
kernel_size = _to_list(self._hparams.kernel_size, 'kernel_size',
nconv)
kernel_size = [_to_list(ks) for ks in kernel_size]
other_kwargs = self._hparams.other_conv_kwargs or {}
if isinstance(other_kwargs, HParams):
other_kwargs = other_kwargs.todict()
if not isinstance(other_kwargs, dict):
raise ValueError("hparams['other_conv_kwargs'] must be a dict.")
conv_pool_hparams = []
activation_fn = get_activation_fn(self._hparams.conv_activation,
self._hparams.conv_activation_kwargs)
for i in range(nconv):
hparams_i = []
names = []
for ks_ij in kernel_size[i]:
name = uniquify_str("conv_%d" % (i + 1), names)
names.append(name)
conv_kwargs_ij = {
"filters": filters[i],
"kernel_size": ks_ij,
"activation": activation_fn,
"name": name
}
conv_kwargs_ij.update(other_kwargs)
hparams_i.append({"type": "Conv1D", "kwargs": conv_kwargs_ij})
if len(hparams_i) == 1:
conv_pool_hparams.append([hparams_i[0], pool_hparams[i]])
else: # creates MergeLayer
mrg_kwargs_layers = []
for hparams_ij in hparams_i:
seq_kwargs_j = {"layers": [hparams_ij, pool_hparams[i]]}
mrg_kwargs_layers.append({
"type": "SequentialLayer",
"kwargs": seq_kwargs_j
})
mrg_hparams = {
"type": "MergeLayer",
"kwargs": {
"layers": mrg_kwargs_layers,
"name": "conv_pool_%d" % (i + 1)
}
}
conv_pool_hparams.append(mrg_hparams)
return conv_pool_hparams
