FastAPI creator here.

If you've used FastAPI you'll probably like Thinc.

It uses Python type hints extensively and even includes a Mypy plugin. So, you'll get nice and clear errors right in your editor for many operations that before were Numpy/Tensor "black magic". All before even running your code.

And you can wrap TensorFlow, PyTorch, and MXNet with it, mix them with Thinc layers, etc.