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3 questions
1vote
3answers
988views
Storing multiple instances on a Singleton?
RefactoringGuru's example Singleton in Python has an _instances dictionary field class Singleton(type): _instances = {} def __call__(cls, *args, **kwargs): if cls not in cls....
4votes
2answers
4kviews
What's wrong with using a Singleton?
I'm working on a Python application in which there are two Singleton classes: App and Configuration. The former seems straight forward, only ever instantiate one App instance; the latter seems ...
- 1,047
5votes
1answer
12kviews
Using singletons in Python (Django)
I was suggested to define a singleton in Python in the following way: class Controller: pass # ... controller = Controller() However, this way, controller cannot be replaced with a derived ...
- 791
