__enter__: The enter method. It is called when the with statement is used on an object. (It is called before the with statement’s code block is executed.)__exit__: The exit method. It is called when the with statement is used on an object. (It is called even if an exception is raised inside the with statement or when the with statement ends normally.)__len__: The length method. It is called when the len() function is called on an object.__contains__: The contains method. It is called when the in operator is used on an object.__del__: The destructor method. It is called when an object is about to be destroyed and it allows the class to perform any cleanup actions. (It is rarely used.)