Here's how you can implement a simple wizard in Odoo. This example allows you to change the status of multiple records at once.

Python Code – example_batch_update_wizard.py
from odoo import api, fields, models
class ExampleBatchUpdateWizard(models.TransientModel):
​_name = 'example.batch.update.wizard'
  ​_description = 'Example Batch Update Wizard'

  ​new_status = fields.Selection([ ('new', 'New'), ('processed', 'Processed'), ​ ​ ​ ('archived', 'Archived'), ], string="Set Status To", required=True) ​ def action_apply_update(self):
  ​""" Batch update 'status' field on selected example.model records. The ​ ​active_ids come from context (selected records). """
​active_ids = self.env.context.get('active_ids', [])
  ​if active_ids:
  ​ ​records = self.env['example.model'].browse(active_ids)​  ​ ​ ​ ​ ​records.write({'status': self.new_status})
​ ​records.write({'status': self.new_status})
  ​ ​return {'type': 'ir.actions.act_window_close'}

XML Code – example_batch_update_wizard_view.xml 

        example.batch.update.wizard.view.form

        example.batch.update.wizard

        Batch Update Status

        example.batch.update.wizard

        form

        new

Remember to replace 'example.model' with the actual name of your model. This code provides a basic functional wizard; you can extend it with more fields and logic as needed.