How to generate app id for creating Toast Notification

Question

I am developing an application using python. ToastNotificationManager.create_toast_notifier(appId) <- requires an application id. I am currently using the app id of powershell. I have to use the app id as it keeps giving me RuntimeError: Element not found if I don't. I referred to many sites including Stack overflow. I simply don't understand how I can register a script to send notifications. I already have the notification working but the problem is that if I specify the windows PowerShell as app id the notification will show the PowerShell name instead of my script's name. (I am using the WinRT package to create the notification)

I am new here couldn't find an appropriate tag