plotly.graph_objects.Contour remove smoothing factor at all?

📊 Plotly Python
1

Hello there, I am trying to point the borders of classes in numpy array.

array([[1, 1, 1, 1, 1, 1, 1, 1, 1, 1],
       [1, 1, 1, 1, 1, 1, 1, 1, 1, 1],
       [1, 1, 1, 1, 1, 1, 1, 1, 2, 2],
       [1, 1, 1, 2, 2, 2, 2, 2, 2, 2],
       [2, 2, 2, 2, 2, 2, 2, 2, 0, 0],
       [2, 2, 2, 2, 2, 2, 2, 0, 0, 0],
       [2, 2, 2, 2, 2, 0, 0, 0, 0, 0],
       [2, 2, 2, 2, 0, 0, 0, 0, 0, 0],
       [2, 2, 2, 0, 0, 0, 0, 0, 0, 0],
       [2, 2, 2, 0, 0, 0, 0, 0, 0, 0]])

I draw it with plotly heatmap and I would like to highlight its’ borders. Using contour gives me a kind of solution, but because of smoothing factor it doesn’t suit me well. Here is what do I expect:
Снимок
Could you provide me any tips how could I draw that black lines without find them in input array above? Thanks in advance!