The Singleton pattern is one of the patterns that finds its place in the book by Gang of Four, and which can have various uses where all we want is a class to have a single instance throughout an application.
The Singleton pattern enforces that a class will have only one instance that will be used by any of the components/modules inside an application. This kind of enforcement can be useful when we want to control the access to a resource using only one object. These type of resources can be log files, databases, crash-handling mechanisms, and so on.
In most of the OOP-based languages, to implement the Singleton pattern, the first step is to make the class constructor private and then use a static method inside a class to return the same instance whenever some part of the code needs to use the functionality of the class. In Python, we do not have the functionality...
