Re: type annotation vs working code

[Barry via Python-list]

> On 1 Oct 2023, at 19:36, Richard Damon via Python-list 
> <python-list@python.org> wrote:
> 
> Perhaps a better method would be rather than just using the name and catching 
> the exception, use a real already_initialized flag (set to True when you 
> initialize), and look it up with getattr() with a default value of False.
I would use a class variable not an instance variable.

class OnlyOne:
       sole_instance = None
       def __init__(self):
              assert OnlyOne.sole_instance is None
              OnlyOne.sole_instance = self

Barry


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