👉 A singleton is a type of data structure in many programming languages that consists of a single element. In other words, it represents a unique object or value with no others sharing its properties. Singletons are often used to store immutable values like numbers, strings, or objects without any need for modification or reuse. For example: ```python class Singleton(object): __instance = None def getInstance(self): if self.__instance is None: self.__instance = Singleton() return
