def sample(key):
result = primitive.initial_style_bind(
random_variable_p,
batch_ndims=0,
distribution_name=dist.__class__.__name__)(
_sample_distribution)(key, dist)
return result
def bijector_bind(bijector, x, **kwargs):
return primitive.initial_style_bind(
bijector_p,
direction=kwargs['direction'],
num_bijector=len(tree_util.tree_leaves(bijector)),
bijector_name=bijector.__class__.__name__)(_bijector)(bijector, x,
**kwargs)
def wrapped(key):
result = primitive.initial_style_bind(
random_variable_p,
distribution_name=dist.__class__.__name__)(_sample_distribution)(
key, dist)
if name is not None:
result = ppl.random_variable(result, name=name)
return result
def call_and_update(self, *args, rng=None, **kwargs):
"""Uses the `layer_cau` primitive to call `self._call_and_update."""
if rng is None:
has_rng = False
else:
# The layer_cau primitive expects RNG as the first argument if `has_rng`
# kwarg is True.
args = (rng, ) + args
has_rng = True
kwargs = dict(kwargs, has_rng=has_rng)
return primitive.initial_style_bind(layer_cau_p, kwargs=kwargs)(
Layer._call_and_update)(self, *args, **kwargs)
def init(self, init_key, *args, name=None, **kwargs):
"""Initializes a Template into a Layer."""
specs = jax.tree_map(state.make_array_spec, args)
kwargs = dict(
cls=self.cls,
specs=specs,
init_args=self.init_args,
init_kwargs=self.init_kwargs,
)
layer = primitive.initial_style_bind(template_init_p)(
_template_build)(init_key, name=name, **kwargs)
if name is not None:
layer = state.variable(layer, name=name)
else:
layer_params = {k: state.variable(v, name=k)
for k, v in layer.variables().items()}
layer = layer.replace(**layer_params)
return layer
def __call__(self, *args, **kwargs):
return primitive.initial_style_bind(self.prim)(self.func)(*args,
**kwargs)
def bijector_bind(bijector, x, **kwargs):
return primitive.initial_style_bind(
bijector_p,
direction=kwargs['direction'],
bijector_name=bijector.__class__.__name__)(_bijector)(bijector, x,
**kwargs)
