tree 414a5fc82e2fc7098f149f0e7c777d02410aa9bb
parent c34fbb319253b6de309b2ebfe74a284995ec701c
author Edward Loper <edloper@google.com> 1586373490 -0700
committer TensorFlower Gardener <gardener@tensorflow.org> 1586373670 -0700

Updated tf.nest to be more consistent in its treatment of namdetuples.  Prior to this, some tf.nest functions treated a type T as a namedtuple only when it was a *direct* subclass of `tuple`, while others treated T as a namedtuple if as long as it was a direct or indirect subclass of `tuple`.  (E.g., tf.nest.assert_same_structure required direct subclasses, but tf.nest.assert_shallow_structure allowed indirect subclasses.)

Now, all tf.nest methods treat T as a namedtuple if it is a direct or indirect subclass of tuple (along with a few other conditions, such as having a _fields attribute).

Removed a check in function deserialization that was made redundant by this change.

PiperOrigin-RevId: 305528863
Change-Id: I7d90d06f5b20a1deb2767bfc6d575e8c3c448569