code: def cublasDsymv(handle, uplo, n, alpha, A, lda, x, incx, beta, y, incy):
      
  
      status = _libcublas.cublasDsymv_v2(handle, 
                                         _CUBLAS_FILL_MODE[uplo], n, 
                                         ctypes.byref(ctypes.c_double(alpha)), 
                                         int(A), lda, int(x), incx, 
                                         ctypes.byref(ctypes.c_double(beta)), 
                                         int(y), incy)
      cublasCheckStatus(status)
docs: Matrix-vector product for real symmetric matrix.