extmath.py 文件源码

def _have_blas_gemm():
    try:
        linalg.get_blas_funcs(['gemm'])
        return True
    except (AttributeError, ValueError):
        warnings.warn('Could not import BLAS, falling back to np.dot')
        return False


# Only use fast_dot for older NumPy; newer ones have tackled the speed issue.