How to create a PlotSurface without filled the contour and select then number of levels

In matploltib there are two ways to draw contour lines without filling and by filling (contour and contourf)


But in vtk there is only the PlotContour option and I have managed to draw the contour filled in 3d but fixing the view so that only the x and y dimensions are visible.

My problem is that I can’t find any option that allows to plot without filling.

Another doubt that I have is that in matplotlib, the function has a parameter levels that allows you to choose the number of contour levels that the plot has. Is there any way to recreate it in vtk?

Thank you very much in advance