/
__init__.py
60 lines (49 loc) · 2.16 KB
/
__init__.py
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import numpy
from chainer.initializers import constant # NOQA
from chainer.initializers import normal # NOQA
from chainer.initializers import orthogonal # NOQA
from chainer.initializers import uniform # NOQA
# import class and function
from chainer.initializers.constant import Constant
from chainer.initializers.constant import Identity # NOQA
from chainer.initializers.constant import NaN # NOQA
from chainer.initializers.constant import One # NOQA
from chainer.initializers.constant import Zero # NOQA
from chainer.initializers.normal import GlorotNormal # NOQA
from chainer.initializers.normal import HeNormal # NOQA
from chainer.initializers.normal import LeCunNormal
from chainer.initializers.normal import Normal # NOQA
from chainer.initializers.orthogonal import Orthogonal # NOQA
from chainer.initializers.uniform import GlorotUniform # NOQA
from chainer.initializers.uniform import HeUniform # NOQA
from chainer.initializers.uniform import LeCunUniform # NOQA
from chainer.initializers.uniform import Uniform # NOQA
def generate_array(initializer, shape, xp):
"""Return initialized array.
The algorithms used to make the new values depend on the
concrete derived classes. The dtype of a generated array depends on
``initializer.dtype``.
Args:
initializer: A callable object that takes :class:`numpy.ndarray`
or :class:`cupy.ndarray` and edits its value.
shape (tuple): Shape of a return array.
xp (module): :mod:`cupy` or :mod:`numpy`.
Returns:
numpy.ndarray or cupy.ndarray: An initialized array.
"""
dtype = numpy.float32
if hasattr(initializer, 'dtype') and initializer.dtype is not None:
dtype = initializer.dtype
array = xp.empty(shape, dtype=dtype)
initializer(array)
return array
def _get_initializer(initializer):
if initializer is None:
return LeCunNormal()
if numpy.isscalar(initializer):
return Constant(initializer)
if isinstance(initializer, numpy.ndarray):
return Constant(initializer)
if not callable(initializer):
raise TypeError('invalid type of initializer: %s' % type(initializer))
return initializer