How to separate a single face of an object?

Coding Python Support
1

I’m making a script that takes an object, uses a boolean operator to make a slice, and finally separates a single face of that slice. So if I were to take a sphere, it creates a very thin slice of that sphere, and finally separates just a flat circle surface. The first part is all working, but the face separation keeps breaking.

I’m new to both Blender and Python so it’s very difficult to find out what’s going wrong…

The Code:



#######################
# Take a slice and separate a face  #		
#######################


import bpy




if bpy.context.mode == 'OBJECT': #necessary for correct selection
    bpy.context.tool_settings.mesh_select_mode=(False,False,True) #optional   
    bpy.ops.object.select_all(action='DESELECT')   
    
    list(bpy.data.objects)
    cube = bpy.data.objects["Cube"]
    if cube.type == "MESH":
            cube.select = False
            m = cube.data
            counterFaces = 0
            biggestArea = 0
            biggestAreaIndex = 0
            for face in m.polygons:
            	if counterFaces == 0:
            		biggest = face.area
            		counterFaces += 1
            	temp = face.area
            	if temp >= biggest:
            		biggestAreaIndex = face.index
                
            
            finalFace = m.polygons[biggestAreaIndex]
            print(finalFace.index)
            print(finalFace.area)
            bpy.context.scene.objects.active = cube 
            bpy.ops.object.mode_set(mode='EDIT')
            finalFace.select = True
            bpy.ops.mesh.hide(unselected=True)
            bpy.ops.mesh.separate(type='SELECTED')