code: def cublasDtrmv(handle, uplo, trans, diag, n, A, lda, x, inx):
      
  
      status = _libcublas.cublasDtrmv_v2(handle, 
                                         _CUBLAS_FILL_MODE[uplo], 
                                         _CUBLAS_OP[trans], 
                                         _CUBLAS_DIAG[diag], 
                                         n, int(A), lda, int(x), inx)
      cublasCheckStatus(status)
docs: Matrix-vector product for real triangular matrix.