Does Numpy automatically detect and use GPU?

Does Numpy/Python automatically detect the presence of GPU and utilize it to speed up matrix computation (e.g. numpy.multiply, numpy.linalg.inv, … etc)?

No.

Or do I have code in a specific way to exploit the GPU for fast computation?

Yes. Search for Numba, CuPy, Theano, PyTorch or PyCUDA for different paradigms for accelerating Python with GPUs.

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