sampler_custom: Base abstract class that allows the user to customize...
In tfaddons: Interface to 'TensorFlow SIG Addons'

Base abstract class that allows the user to customize sampling.

sampler_custom(
  initialize_fn,
  sample_fn,
  next_inputs_fn,
  sample_ids_shape = NULL,
  sample_ids_dtype = NULL
)

`initialize_fn`	callable that returns (finished, next_inputs) for the first iteration.
`sample_fn`	callable that takes (time, outputs, state) and emits tensor sample_ids.
`next_inputs_fn`	callable that takes (time, outputs, state, sample_ids) and emits (finished, next_inputs, next_state).
`sample_ids_shape`	Either a list of integers, or a 1-D Tensor of type int32, the shape of each value in the sample_ids batch. Defaults to a scalar.
`sample_ids_dtype`	The dtype of the sample_ids tensor. Defaults to int32.