* Enable to stack Batch instances. Add Batch cat static method. Rename cat in cat_ since inplace.
* Properly handle Batch init using np.array of dict.
* WIP
* Get rid of metadata.
* Update UT. Replace cat by cat_ everywhere.
* Do not sort Batch keys anymore for efficiency. Add items method.
* Fix cat copy issue.
* Add unit test to chack cat and stack methods.
* Remove used import.
* Fix linter issues.
* Fix unit tests.
Co-authored-by: Alexis Duburcq <alexis.duburcq@wandercraft.eu>
* add sum_tree.py
* add prioritized replay buffer
* del sum_tree.py
* fix some format issues
* fix weight_update bug
* simply replace replaybuffer in test_dqn without weight update
* weight default set to 1
* fix sampling bug when buffer is not full
* rename parameter
* fix formula error, add accuracy check
* add PrioritizedDQN test
* add test_pdqn.py
* add update_weight() doc
* add ref of prio dqn in readme.md and index.rst
* restore test_dqn.py, fix args of test_pdqn.py