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From: ram@zedat.fu-berlin.de (Stefan Ram)
Newsgroups: comp.lang.python
Subject: Re: type annotation vs working code
Date: 4 Oct 2023 11:56:50 GMT
Organization: Stefan Ram
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Expires: 1 Sep 2024 11:59:58 GMT
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References: <ZRhwWN29i3mskxEL@hermes.hilbert.loc> <ecc36615-1844-455f-b701-2bd41d98e9e1@DancesWithMice.info> <ZRigRwHpNReUo5rF@hermes.hilbert.loc> <4f1c9568-3850-4847-b357-740f79b0a79b@DancesWithMice.info> <ZRlelmUwOR/wcPqR@hermes.hilbert.loc> <f093d0a9-67b3-4baa-baae-3666c9847a14@DancesWithMice.info> <mailman.392.1696393517.23016.python-list@python.org>
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dn <PythonList@DancesWithMice.info> writes:
>- should the class have been called either;
> class SomethingSingleton():
>or a Singleton() class defined, which is then sub-classed, ie
A singleton is a single instance of a class that usually is
used "globally" in an application. Such as "root" in
import logging
root = logging.getLogger()
. So, when a singleton is needed in Python, I would follow
the model of "getLogger". You do not have to put in effort
to keep any client from creating more than one instance of
a class. Multiple instances of a class intended for singletons
might help when one is writing tests for this class.
(My above opinion was stolen from Brandon Rhodes.)