Blender : Instance object using Geometry Nodes

import bpy
from math import pi
from random import random
from mathutils import Vector

bpy.ops.mesh.primitive_monkey_add()
instance_obj = bpy.context.active_object

bpy.ops.mesh.primitive_cube_add()
instancer_obj = bpy.context.active_object

instancer_mesh = instancer_obj.data
instancer_mesh.clear_geometry()
verts_amount = 10000
verts = [Vector((random(), random(), random())) * 50 for v in range(verts_amount)]
instancer_mesh.from_pydata(verts, [], [])
attributes = instancer_mesh.attributes

rotation = attributes.new(name="rotation", type="FLOAT_VECTOR", domain="POINT")
random_rots = [2 * pi * random() for v in range(verts_amount * 3)]
rotation.data.foreach_set("vector", random_rots)
scale = attributes.new(name="scale", type="FLOAT", domain="POINT")
random_scales = [(random() + 0.25) for v in range(verts_amount)]
scale.data.foreach_set("value", random_scales)

mod = instancer_obj.modifiers.new(type="NODES", name="")
bpy.ops.node.new_geometry_node_group_assign()

node_tree = mod.node_group
nodes = node_tree.nodes

instance_on_points = nodes.new(type="GeometryNodeInstanceOnPoints")
object_info = nodes.new(type="GeometryNodeObjectInfo")
object_info.inputs[0].default_value = instance_obj
object_info.location[0] -= 200

input = next(n for n in nodes if n.name == "Group Input")
output = next(n for n in nodes if n.name == "Group Output")

links = node_tree.links
links.new(input.outputs["Geometry"], instance_on_points.inputs["Points"])
links.new(input.outputs[-1], instance_on_points.inputs["Rotation"])
links.new(input.outputs[-1], instance_on_points.inputs["Scale"])
links.new(object_info.outputs["Geometry"], instance_on_points.inputs["Instance"])
links.new(instance_on_points.outputs["Instances"], output.inputs["Geometry"])

mod["Input_2_use_attribute"] = True
mod["Input_2_attribute_name"] = "rotation"
mod["Input_3_use_attribute"] = True
mod["Input_3_attribute_name"] = "scale"