How to get / set my_node.inputs or node.outputs .keys()?

Question

I'm trying to access the keys of a particular node of inputs and outputs. to access the use property keys:

n = my_node #(From node_tree.nodes)

for key in n.bl_rna.properties.keys():
    attributes = getattr(n, key)

now I would like to access the attributes of n.inputs and n.outputs

but this does not produce any results:

for key in n.outputs.bl_rna.properties.keys():
    attributes = getattr(n.outputs, key)

I'm pretty confused about this, I'm probably wrong

Edit: For more details, this would serve to copy the nodes and their properties. But when I have to access the inputs and outputs properties I have difficulties at the moment, post a small test that I am running, for now it does not work properly, but perhaps it makes better understand what I am trying to do

for n in bpy.context.scene.node_tree.nodes:
    tipo_di_nodo = n.bl_rna.identifier ##Ty @batFINGER
    nodo_copiato = bpy.context.scene.node_tree.nodes.new(tipo_di_nodo)

    #This copies the node exactly, with some data         
    for key in n.bl_rna.properties.keys():
        source_attribute = getattr(n, key)
        if not n.is_property_readonly(key):
            setattr(nodo_copiato, key, source_attribute)

    #I would like it to copy and assign value inputs
    #For now this is not working
    for val in n.inputs.values():
        for key in val.bl_rna.properties.keys():     
            in_source_attribute = getattr(val,key)
            if not val.is_property_readonly(key):
                setattr(nodo_copiato, key, in_source_attribute)

Note: I want to clarify, because i don't want to create further confusion, that the question is not "How to copy an entire tree of nodes" but is how to access the values n.inputs [#].default_values (and other) in complete automation, as it is done in the line of my code in the part where the attributes are set via setattr / getattr As I want to get there by myself to the copy of a tree of knots, I am trying to study the situation, trying to better understand Blender's API thanks to the help of the community