def initialize(self, shape):
"""Initializes the uninitialized variable.
Uninitialized variable is a variable created with the data array set to
None. This method creates and initializes the data array. The shape of
the variable can be left unknown until this method is called.
Args:
shape (tuple of int): Shape of the data array.
"""
xp = numpy if self._initial_backend != 'cuda' else cuda.cupy
with cuda.get_device_from_id(self._initial_device):
data = initializers.generate_array(self.initializer, shape, xp)
ginit = self._grad_initializer
grad = None if ginit is None else initializers.generate_array(
ginit, shape, xp)
self.data = data
self.grad = grad
# Convert the array for iDeep.
if self._initial_backend == 'intel64':
self.to_intel64()
def initialize(self, shape):
"""Initializes the uninitialized variable.
Uninitialized variable is a variable created with the data array set to
None. This method creates and initializes the data array. The shape of
the variable can be left unknown until this method is called.
Args:
shape (tuple of int): Shape of the data array.
"""
xp = numpy if self._initial_backend != 'cuda' else cuda.cupy
with cuda.get_device_from_id(self._initial_device):
data = initializers.generate_array(self.initializer, shape, xp)
ginit = self._grad_initializer
grad = None if ginit is None else initializers.generate_array(
ginit, shape, xp)
self.array = data
self.grad = grad
# Convert the array for iDeep.
if self._initial_backend == 'intel64':
self.to_intel64()
def __init__(self,
sample_rate=16000,
window_size_sec=0.02,
window_stride_sec=0.01,
n_fft=512,
n_filters=64,
preemph=0.97,
dither=1.0e-05):
super(NemoMelSpecExtractor, self).__init__()
self.log_zero_guard_value = 2**-24
win_length = int(window_size_sec * sample_rate)
self.hop_length = int(window_stride_sec * sample_rate)
self.n_filters = n_filters
from scipy import signal as scipy_signal
from librosa import stft as librosa_stft
window_arr = scipy_signal.hann(win_length, sym=True)
self.stft = lambda x: librosa_stft(x,
n_fft=n_fft,
hop_length=self.hop_length,
win_length=win_length,
window=window_arr,
center=True)
self.dither = dither
self.preemph = preemph
self.pad_align = 16
from librosa.filters import mel as librosa_mel
self.fb_arr = librosa_mel(sample_rate,
n_fft,
n_mels=n_filters,
fmin=0,
fmax=(sample_rate / 2))
with self.init_scope():
self.window = initializers.generate_array(initializer=Constant(
0, dtype="float32"),
shape=window_arr.shape,
xp=self.xp,
dtype=np.float32)
self.register_persistent("window")
self.fb = initializers.generate_array(
initializer=Constant(0, dtype="float32"),
shape=np.expand_dims(self.fb_arr, axis=0).shape,
xp=self.xp,
dtype="float32")
self.register_persistent("fb")
def _init_array(self, initializer, default_value, size):
if initializer is None:
initializer = default_value
initializer = initializers._get_initializer(initializer)
return initializers.generate_array(
initializer, size, self.xp, dtype=self._highprec_dtype,
device=self.device)
def check_shaped_initializer(self, backend_config):
initializer = self.target(dtype=self.dtype, **self.target_kwargs)
xp = backend_config.xp
w = initializers.generate_array(initializer, self.shape, xp)
self.assertIs(backend.get_array_module(w), xp)
self.assertTupleEqual(w.shape, self.shape)
self.assertEqual(w.dtype, self.dtype)
def __init__(self,
in_channels,
out_channels,
ksize,
stride,
pad,
groups):
super(CondenseComplexConv, self).__init__()
with self.init_scope():
self.bn = L.BatchNormalization(size=in_channels)
self.activ = F.relu
self.conv = L.Convolution2D(
in_channels=in_channels,
out_channels=out_channels,
ksize=ksize,
stride=stride,
pad=pad,
nobias=True,
groups=groups)
self.c_shuffle = ChannelShuffle(
channels=out_channels,
groups=groups)
self.index = initializers.generate_array(
initializer=initializers._get_initializer(0),
shape=(in_channels,),
xp=self.xp,
dtype=np.int32)
self.register_persistent('index')
def _init_array(self, initializer, default_value, size):
if initializer is None:
initializer = default_value
initializer = initializers._get_initializer(initializer)
return initializers.generate_array(
initializer, size, self.xp, dtype=self._highprec_dtype,
device=self.device)
def __init__(self, initializer=None, shape=None, name=None):
if initializer is None:
initializer = constant.NaN()
elif numpy.isscalar(initializer):
initializer = constant.Constant(initializer)
if shape is None:
if isinstance(initializer, (numpy.ndarray, cuda.ndarray)):
# parameter initialized by the initial array
super(Parameter, self).__init__(initializer, name=name)
else:
# uninitialized parameter
super(Parameter, self).__init__(name=name)
dtype = getattr(initializer, 'dtype', None)
self._grad_initializer = constant.NaN(dtype)
else:
# parameter initialized with a given shape
if isinstance(initializer, (numpy.ndarray, cuda.ndarray)):
xp = cuda.get_array_module(initializer)
initializer = constant.Constant(initializer)
else:
xp = numpy
data = initializers.generate_array(initializer, shape, xp)
grad = xp.full_like(data, numpy.nan)
super(Parameter, self).__init__(data, name=name, grad=grad)
self.update_rule = None
self.initializer = initializer
def load_pretrained_embedding_layer(id2unigram,
embed,
external_model,
finetuning=False):
xp = cuda.get_array_module(embed.W)
n_vocab = len(id2unigram)
dim = external_model.wv.syn0[0].shape[0]
initialW = initializers.normal.Normal(1.0)
weight = []
count = 0
for i in range(n_vocab):
key = id2unigram[i]
if key in external_model.wv.vocab:
vec = external_model.wv[key]
count += 1
else:
if finetuning:
vec = initializers.generate_array(initialW, (dim, ), xp)
else:
vec = xp.zeros(dim, dtype='f')
weight.append(vec)
weight = xp.reshape(weight, (n_vocab, dim))
embed.W = chainer.Parameter(initializer=weight)
if count >= 1:
print('Use {} pretrained embedding vectors\n'.format(count),
file=sys.stderr)
def __init__(self, initializer=None, shape=None, name=None):
if initializer is None:
initializer = constant.NaN()
elif numpy.isscalar(initializer):
initializer = constant.Constant(initializer)
if shape is None:
if isinstance(initializer, (numpy.ndarray, cuda.ndarray)):
# parameter initialized by the initial array
super(Parameter, self).__init__(initializer, name=name)
else:
# uninitialized parameter
super(Parameter, self).__init__(name=name)
self.initializer = initializer
dtype = getattr(initializer, 'dtype', numpy.float32)
self._grad_initializer = constant.NaN(dtype)
else:
# parameter initialized with a given shape
if isinstance(initializer, (numpy.ndarray, cuda.ndarray)):
xp = cuda.get_array_module(initializer)
initializer = constant.Constant(initializer)
else:
xp = numpy
data = initializers.generate_array(initializer, shape, xp)
grad = xp.full_like(data, numpy.nan)
super(Parameter, self).__init__(data, name=name, grad=grad)
self.update_rule = None
def grow_embedding_layers_with_pretrained_model(n_vocab_org,
n_vocab_grown,
rand_embed,
pretrained_embed,
external_model,
id2unigram_grown,
train=False):
diff = n_vocab_grown - n_vocab_org
d_rand = rand_embed.W.shape[1]
d_pretrained = pretrained_embed.W.shape[
1] #external_model.wv.syn0[0].shape[0]
count = 0
initialW = initializers.normal.Normal(1.0)
w2_rand = []
w2_pretrained = []
for i in range(n_vocab_org, n_vocab_grown):
if train: # resume training
vec_rand = initializers.generate_array(initialW, (d_rand, ), np)
else: # test
vec_rand = rand_embed.W[
0].data # use pretrained vector of unknown token
w2_rand.append(vec_rand)
key = id2unigram_grown[i]
if key in external_model.wv.vocab:
vec_pretrained = external_model.wv[key]
count += 1
else:
vec_pretrained = np.zeros(d_pretrained, dtype='f')
w2_pretrained.append(vec_pretrained)
w2_rand = np.reshape(w2_rand, (diff, d_rand))
if cuda.get_array_module(rand_embed.W) == cuda.cupy:
w2_rand = chainer.Variable(w2_rand)
w2_rand.to_gpu()
w_rand = F.concat((rand_embed.W, w2_rand), axis=0)
rand_embed.W = chainer.Parameter(initializer=w_rand.data, name='W')
w2_pretrained = np.reshape(w2_pretrained, (diff, d_pretrained))
if cuda.get_array_module(rand_embed.W) == cuda.cupy:
w2_pretrained = chainer.Variable(w2_pretrained)
w2_pretrained.to_gpu()
w_pretrained = F.concat((pretrained_embed.W, w2_pretrained), 0)
pretrained_embed.W = chainer.Parameter(initializer=w_pretrained.data,
name='W')
print('Grow embedding matrix: {} -> {}'.format(n_vocab_org,
rand_embed.W.shape[0]),
file=sys.stderr)
print('Grow pretrained embedding matrix: {} -> {}'.format(
n_vocab_org, pretrained_embed.W.shape[0]),
file=sys.stderr)
if count >= 1:
print('Add {} pretrained embedding vectors'.format(count),
file=sys.stderr)
def check_shaped_initializer(self, xp):
initializer = initializers.Identity(scale=self.scale, dtype=self.dtype)
w = initializers.generate_array(initializer, self.shape, xp)
self.assertIs(backend.get_array_module(w), xp)
self.assertTupleEqual(w.shape, self.shape)
self.assertEqual(w.dtype, self.dtype)
testing.assert_allclose(w,
self.scale * numpy.identity(len(self.shape)),
**self.check_options)
def check_shaped_initializer(self, xp):
initializer = initializers.Constant(fill_value=self.fill_value,
dtype=self.dtype)
w = initializers.generate_array(initializer, self.shape, xp)
self.assertIs(backend.get_array_module(w), xp)
self.assertTupleEqual(w.shape, self.shape)
self.assertEqual(w.dtype, self.dtype)
testing.assert_allclose(w, numpy.full(self.shape, self.fill_value),
**self.check_options)
def check_shaped_initializer(self, xp):
initializer = initializers.Identity(
scale=self.scale, dtype=self.dtype)
w = initializers.generate_array(initializer, self.shape, xp)
self.assertIs(cuda.get_array_module(w), xp)
self.assertTupleEqual(w.shape, self.shape)
self.assertEqual(w.dtype, self.dtype)
testing.assert_allclose(
w, self.scale * numpy.identity(len(self.shape)),
**self.check_options)
def check_shaped_initializer(self, xp):
initializer = initializers.Constant(
fill_value=self.fill_value, dtype=self.dtype)
w = initializers.generate_array(initializer, self.shape, xp)
self.assertIs(cuda.get_array_module(w), xp)
self.assertTupleEqual(w.shape, self.shape)
self.assertEqual(w.dtype, self.dtype)
testing.assert_allclose(
w, numpy.full(self.shape, self.fill_value),
**self.check_options)
def initialize_state(self, shape):
if self.gpu:
xp = cuda.cupy
else:
xp = np
self.s = initializers.generate_array(initializers.Normal(),
(shape[0], self.n_out),
xp,
dtype=xp.float32)
self.y = Variable(xp.zeros((shape[0], self.n_out), dtype=xp.float32))
def initialize(self, shape):
"""Initializes the uninitialized variable.
Uninitialized variable is a variable created with the data array set to
None. This method creates and initializes the data array. The shape of
the variable can be left unknown until this method is called.
Args:
shape (tuple of int): Shape of the data array.
"""
xp = numpy if self._initial_device is None else cuda.cupy
with cuda.get_device_from_id(self._initial_device):
data = initializers.generate_array(self.initializer, shape, xp)
ginit = self._grad_initializer
grad = None if ginit is None else initializers.generate_array(
ginit, shape, xp)
self._data[0] = data
self._node._grad = grad
def __init__(self, units, in_units, drop_rate=0.5):
super(CondenseLinear, self).__init__()
drop_in_units = int(in_units * drop_rate)
with self.init_scope():
self.dense = L.Linear(in_size=drop_in_units, out_size=units)
self.index = initializers.generate_array(
initializer=initializers._get_initializer(0),
shape=(drop_in_units, ),
xp=self.xp,
dtype=np.int32)
self.register_persistent('index')
def add_param(self, name, shape, dtype=numpy.float32, initializer=None):
"""Registers a parameter to the link.
The registered parameter is saved and loaded on serialization and
deserialization, and involved in the optimization. The data and
gradient of the variable are initialized by NaN arrays.
If ``initializer`` is not ``None``, the data is initialized by
``initializer``.
If the supplied ``name`` argument corresponds to an uninitialized
parameter (that is, one that was added with the
:meth:`add_uninitialized_param` method), ``name`` will be removed
from the set of uninitialized parameters.
The parameter is set to an attribute of the link with the given name.
Args:
name (str): Name of the parameter. This name is also used as the
attribute name. Any uninitialized parameters with the same
name will be removed.
shape (int or tuple of ints): Shape of the parameter array.
dtype: Data type of the parameter array.
initializer(chainer.initializer.Initializer): If it is not
``None``, the data is initialized with the given initializer.
Note that in this case ``dtype`` argument is ignored.
"""
d = self.__dict__
if name in d:
raise AttributeError(
'cannot register a new parameter %s: attribute exists'
% name)
if initializer is None:
data = self.xp.full(shape, numpy.nan, dtype=dtype)
else:
data = initializers.generate_array(initializer, shape, self.xp)
u = self._uninitialized_params.get(name)
if u is None:
grad = self.xp.full_like(data, numpy.nan)
else:
if u._cleared:
grad = None
elif u._zeroed:
grad = self.xp.zeros_like(data)
else:
grad = self.xp.full_like(data, numpy.nan)
var = variable.Variable(data, volatile='auto', name=name)
var.grad = grad
self._params.append(name)
d[name] = var
if name in self._uninitialized_params:
del self._uninitialized_params[name]
def initialize(self, shape):
"""Initializes the uninitialized variable.
Uninitialized variable is a variable created with the data array set to
None. This method creates and initializes the data array. The shape of
the variable can be left unknown until this method is called.
Args:
shape (tuple of int): Shape of the data array.
"""
data = initializers.generate_array(self.initializer, shape, numpy)
ginit = self._grad_initializer
grad = None if ginit is None else initializers.generate_array(
ginit, shape, numpy)
if self._initial_device >= 0:
data = cuda.to_gpu(data, device=self._initial_device)
if grad is not None:
grad = cuda.to_gpu(grad, device=self._initial_device)
self._data[0] = data
self._node._grad = grad
def initialize(self, shape):
"""Initializes the uninitialized variable.
Uninitialized variable is a variable created with the data array set to
None. This method creates and initializes the data array. The shape of
the variable can be left unknown until this method is called.
Args:
shape (tuple of int): Shape of the data array.
"""
data = initializers.generate_array(self.initializer, shape, numpy)
ginit = self._grad_initializer
grad = None if ginit is None else initializers.generate_array(
ginit, shape, numpy)
if self._initial_device >= 0:
data = cuda.to_gpu(data, device=self._initial_device)
if grad is not None:
grad = cuda.to_gpu(grad, device=self._initial_device)
self._data[0] = data
self._node._grad = grad
def grow_embedding_layer_without_pretrained_model(n_vocab_org,
n_vocab_grown,
rand_embed,
train=False):
xp = cuda.get_array_module(rand_embed.W)
diff = n_vocab_grown - n_vocab_org
d_rand = rand_embed.W.shape[1]
initialW = initializers.normal.Normal(1.0)
if train:
w2_rand = initializers.generate_array(initialW, (diff, d_rand), xp)
else:
w2_rand = xp.zeros((diff, d_rand), dtype='f')
w_rand = F.concat((rand_embed.W, w2_rand), axis=0)
rand_embed.W = chainer.Parameter(initializer=w_rand.data, name='W')
print('Grow embedding matrix: {} -> {}'.format(n_vocab_org,
rand_embed.W.shape[0]),
file=sys.stderr)
def grow_embedding_layer_with_pretrained_model(n_vocab_org,
n_vocab_grown,
rand_embed,
external_model,
id2unigram_grown,
train=False,
fasttext=False):
diff = n_vocab_grown - n_vocab_org
d_rand = rand_embed.W.shape[1]
count = 0
initialW = initializers.normal.Normal(1.0)
w2_rand = []
# [MEMO] the following error happened if fasttext=True:
# cupy.cuda.cudnn.CuDNNError: CUDNN_STATUS_INTERNAL_ERROR: b'CUDNN_STATUS_INTERNAL_ERROR'
wv_vocab = external_model.wv if fasttext else external_model.wv.vocab
for i in range(n_vocab_org, n_vocab_grown):
key = id2unigram_grown[i]
if key in wv_vocab:
vec_rand = external_model.wv[key]
count += 1
elif train:
vec_rand = initializers.generate_array(initialW, (d_rand, ), np)
else:
vec_rand = rand_embed.W[
0].data # use pretrained vector of unknown token
w2_rand.append(vec_rand)
w2_rand = np.reshape(w2_rand, (diff, d_rand))
if cuda.get_array_module(rand_embed.W) == cuda.cupy:
w2_rand = chainer.Variable(w2_rand)
w2_rand.to_gpu()
w_rand = F.concat((rand_embed.W, w2_rand), axis=0)
rand_embed.W = chainer.Parameter(initializer=w_rand.data, name='W')
print('Grow embedding matrix: {} -> {}'.format(n_vocab_org,
rand_embed.W.shape[0]),
file=sys.stderr)
if count >= 1:
print('Add {} pretrained embedding vectors'.format(count),
file=sys.stderr)
def check_shaped_initializer(self, xp):
initializer = self.target(scale=0.1, dtype=self.dtype)
w = initializers.generate_array(initializer, self.shape, xp)
self.assertIs(cuda.get_array_module(w), xp)
self.assertTupleEqual(w.shape, self.shape)
self.assertEqual(w.dtype, self.dtype)
def _generate_array(self, xp, dtype=None, device=None):
initializer = initializers.Zero(dtype)
return initializers.generate_array(initializer, (), xp, device=device)
def check_shaped_initializer(self, xp):
initializer = self.target(scale=0.1, dtype=self.dtype)
w = initializers.generate_array(initializer, self.shape, xp)
self.assertIs(cuda.get_array_module(w), xp)
self.assertTupleEqual(w.shape, self.shape)
self.assertEqual(w.dtype, self.dtype)
def _init_array(initializer, default_value, size, dtype):
if initializer is None:
initializer = default_value
initializer = initializers._get_initializer(initializer)
return initializers.generate_array(initializer, size, numpy, dtype=dtype)
def check_shaped_initializer(self, xp):
initializer = initializers.Orthogonal(scale=2.0, dtype=self.dtype)
w = initializers.generate_array(initializer, self.shape, xp)
self.assertIs(backend.get_array_module(w), xp)
self.assertTupleEqual(w.shape, self.shape)
self.assertEqual(w.dtype, self.dtype)
def _generate_array(self, xp, dtype=None, device=None):
initializer = initializers.Zero(dtype)
return initializers.generate_array(initializer, (), xp, device=device)
def check_shaped_initializer(self, xp):
initializer = self.target(dtype=self.dtype, **self.target_kwargs)
w = initializers.generate_array(initializer, self.shape, xp)
self.assertIs(backend.get_array_module(w), xp)
self.assertTupleEqual(w.shape, self.shape)
self.assertEqual(w.dtype, self.dtype)
def _generate_array(self, dtype=None):
initializer = initializers.Zero(dtype)
return initializers.generate_array(initializer, (), numpy)
def _init_array(initializer, default_value, size, dtype):
if initializer is None:
initializer = default_value
initializer = initializers._get_initializer(initializer)
return initializers.generate_array(initializer, size, numpy, dtype=dtype)
def check_shaped_initializer(self, xp):
initializer = initializers.Orthogonal(scale=2.0, dtype=self.dtype)
w = initializers.generate_array(initializer, self.shape, xp)
self.assertIs(backend.get_array_module(w), xp)
self.assertTupleEqual(w.shape, self.shape)
self.assertEqual(w.dtype, self.dtype)