Traceback most recent call last File Ethreepicturethreepicturepy line 20 in module contour = axcontour3DX Y Z data levels=volume colors=blue File Ethreepicturevenvlibsite-packagesmatplotlib__init

The error message is indicating that the input variable "Z" in the line "contour = ax.contour3D(X, Y, Z, data, levels=[volume], colors='blue')" should be a 2D array, but it is currently a 3D array.

To fix this error, you need to make sure that the "Z" variable is a 2D array before passing it to the contour3D function. You can try reshaping or slicing the array to remove the extra dimension.