Srihari Humbarwadi

Adding support for reading and writing to multiple tfrecords in `nsl.tools.pack_nbrs`

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The current implementation of `nsl.tools.pack_nbrs` does not support reading and writing to multiple tfrecord files. Given the extensive optimizations made available by the `tf.data` API when working with multiple tfrecords,...

If I understand correctly, the code in [tensorflow2/actor_critic.py](https://github.com/philtabor/Youtube-Code-Repository/blob/master/ReinforcementLearning/PolicyGradient/actor_critic/tensorflow2/actor_critic.py) implements the `One-step Actor-Critic (episodic)` algorithm given on page 332 of RLbook2020 by Sutton/barto (picture given below).  Here we can see...

Support per sample topk loss for semantic segmentation

1

- [ ] Bug fix (non-breaking change which fixes an issue) - [ ] Documentation update - [ ] TensorFlow 2 migration - [x] New feature (non-breaking change which adds...