Iam using odoo 13

Wizard is opening from button event but with same code its not opening from Action menu event why.

    sample.wizard.form
    sample.wizard
    
        
            
                

                    
                    

                    
                    

                    
                    

                    
                

            
        
    

    Change My Preferences
    ir.actions.act_window
    sample.wizard
    
    form
    
    new

 
    Update wizard ddd
    
    
    ir.actions.server
    code
    
        records.openwizarddemo()
    

def openwizarddemo(self):
    print('wizard')
    action = self.env['ir.actions.act_window'].for_xml_id('sample_wizard', 'sample_wizard_action')