Singleton: This creates only one instance of a class during the application's lifecycle. Every time you request this class, you get the same instance. Use it for classes that are expensive to create or maintain a common state throughout the application, like a database connection. Transient: Every time you request a transient class, a new instance is created. This is useful for lightweight, stateless services where each operation requires a clean and independent instance. Scoped: Scoped instances are created once per client request. In a web application, for example, a new instance is created for each HTTP request but is shared across that request. Use it for services that need to maintain state within a request but not beyond it, like shopping cart in an e-commerce site. More on reddit.com

Here's how you can check: The is identity check. No matter where you compare against a boolean value, it will report not just that it equals that boolean, but it will BE that boolean. An experiment: in multiple places in your code, print id(True). I'm willing to bet (cannot confirm, fully accept that I might be wrong) that the return values are consistent within the same interpreter session. More on reddit.com