icosider_ASAPiT

import bpy
import bmesh
from bpy.types import Operator
from bpy.props import *
from bpy_extras.object_utils import AddObjectHelper, object_data_add
from mathutils import Vector

length = 5


class DialogOperator(bpy.types.Operator):
    bl_idname = "object.dialog_operator"
    bl_label = "Simple Dialog Operator"

    my_size = IntProperty(name="lenght", default=5)

    def execute(self, context):
        global length
        length = self.my_size
        message = "%d" % (self.my_size)
        return {'FINISHED'}

    def invoke(self, context, event):
        global length
        self.my_size = length
        return context.window_manager.invoke_props_dialog(self)


def add_object(self, context):
    global length

    mesh = bpy.data.meshes.new('Basic_Sphere')
    basic_sphere = bpy.data.objects.new("Basic_Sphere", mesh)
    bpy.context.collection.objects.link(basic_sphere)
    bpy.context.view_layer.objects.active = basic_sphere
    basic_sphere.select_set(True)
    bm = bmesh.new()
    print(bmesh.ops.create_uvsphere(bm, u_segments=5, v_segments=3, diameter=length))
    bm.to_mesh(mesh)


class OBJECT_OT_add_object(Operator, AddObjectHelper):
    """Create a new Mesh Object"""
    bl_idname = "mesh.add_object"
    bl_label = "Add ico"
    bl_options = {'REGISTER', 'UNDO'}

    def execute(self, context):
        add_object(self, context)
        return {'FINISHED'}


def add_object_button(self, context):
    self.layout.operator(
        OBJECT_OT_add_object.bl_idname,
        text="Add ico",
        icon='MESH_UVSPHERE')


def register():
    bpy.utils.register_class(DialogOperator)
    bpy.utils.register_class(OBJECT_OT_add_object)
    bpy.types.VIEW3D_MT_mesh_add.append(add_object_button)


register()
bpy.ops.object.dialog_operator('INVOKE_DEFAULT')