Try D language, with its numerical library you can get both productivity and performance that is even better than the OpenBLAS (Numpy and Julia library are based on) [1].

In D you get the consistency of a single unified language semantic unlike the impedance mismatched approach that is inherent in Python and Numpy programming combination.

[1]http://blog.mir.dlang.io/glas/benchmark/openblas/2016/09/23/...