Generates a shallow structure from a
tf.contrib.framework.nest.get_traverse_shallow_structure( traverse_fn, structure, expand_composites=False )
traverse_fn must accept any possible subtree of
structure and return
a depth=1 structure containing
False values, describing which
of the top-level subtrees may be traversed. It may also
False "traversal is OK / not OK for all subtrees."
Examples are available in the unit tests (nest_test.py).
traverse_fn: Function taking a substructure and returning either a scalar
bool(whether to traverse that substructure or not) or a depth=1 shallow structure of the same type, describing which parts of the substructure to traverse.
structure: The structure to traverse.
expand_composites: If true, then composite tensors such as tf.SparseTensor and tf.RaggedTensor are expanded into their component tensors.
A shallow structure containing python bools, which can be passed to
traverse_fnreturns a sequence for a non-sequence input, or a structure with depth higher than 1 for a sequence input, or if any leaf values in the returned structure or scalar are not type