code: def __init__(self, billing_project):
      super().__init__(
          f"Billing project {billing_project} does not exist.", "error"
      )
  
imports: from aiohttp import web
label_desc: Use image node_id 1 to create a new NonExistentBillingProjectError object from inherited base classes: BatchUserError with example: obj = NonExistentBillingProjectError(billing_project)