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 <a name="python-general-purpose-machine-learning"></a>
 #### General-Purpose Machine Learning
 
+ * [XAD](https://pypi.org/project/xad/) -> Fast and easy-to-use backpropagation tool.
  * [Aim](https://github.com/aimhubio/aim) -> An easy-to-use & supercharged open-source AI metadata tracker.
  * [RexMex](https://github.com/AstraZeneca/rexmex) -> A general purpose recommender metrics library for fair evaluation.
  * [ChemicalX](https://github.com/AstraZeneca/chemicalx) -> A PyTorch based deep learning library for drug pair scoring