What's the Best Way to Create Singletons in Python?

Defining Singletons with Simplicity and Elegance

In the realm of Python programming, creating singletons poses a common question: Is there an optimal approach? This question has sparked numerous discussions on StackOverflow, where diverse techniques have emerged.

Among the proposed solutions, one school of thought advocates the use of modules. By encapsulating functions within a module instead of a class, one effectively creates a singleton. All variables bound to the module remain accessible, and since modules cannot be instantiated repeatedly, the singleton property is inherently preserved.

Another perspective suggests utilizing a class, acknowledging the absence of private classes or constructors in Python. While multiple instantiations are technically possible, adhering to conventions in API usage can effectively discourage such behavior. Proponents of this approach often argue that placing methods within a module and treating the module as the singleton is a viable alternative.

Ultimately, the choice between these approaches depends on individual preferences and application requirements. Both methods provide viable means to define singletons in Python, ensuring that a single instance of the desired object or functionality is accessible throughout the application.

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