Example of creating and setting a Cycles material node with the Python API

Question

I'm trying to set the properties of a Cycles material, which is linked to a Plane object, using the API.

So far this is what I've got:

1. Create a floor plane object:

   bpy.ops.mesh.primitive_plane_add(radius=3, view_align=False, enter_editmode=False, location=(0, 0, 0))
   
   my_floor = bpy.data.objects["Plane"]
   

2. Create the material for my floor, (I'm assuming it does not already exist):

   my_floors_material_name = "Material"
   
   #create the materials object
   my_floors_material_object =    bpy.data.materials.new(my_floors_material_name)
   
   #Enable 'Use nodes':
   my_floors_material_object.use_nodes = True
   

3. Add a new node type from the list [types.ShaderNode][1]. I'd like to choose the equivalent of node_groups["Shader Nodetree"].nodes["Anisotropic BSDF"]:

   #create the input node
   shinny_floor_input_node = my_floors_material_nodes.new(type='ShaderNodeBsdfAnisotropic')
   
   #create the output node
   shinny_floor_output_node = my_floors_material_nodes.new(type='ShaderNodeOutputMaterial') 
   
   #link the input and output nodes, on the node tree of my object
       my_floors_material_object.node_tree.links.new(shinny_floor_input_node.outputs[0], shinny_floor_output_node.inputs[0])
   
   
   #this runs and returns 
   bpy.data.node_groups['Shader Nodetree']...NodeLink
   

4. Assign the floor material to the floor object:

   #assign the material object, to the plane object
   my_floor.data.materials.append( my_floors_material_object )  
   

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Unfortunately it does not work? Here's the floor I want to create, (the shinny one below the statue)

Here's what I get with my current script:

Seems like it should an easy thing to do, but I'm confused? Here's the a link that I used to get started, Control Cycles material nodes and material properties in Python

Thanks a lot for any help!