Destructor in Python | Python Tutorial

Destructor in a program plays the role of reversing the operations performed by the constructor that is used for clearing the object of the class that was created by the constructor program. Like any other object oriented programming language applied for the development of a system or web based application, Python allows almost all the functional features dealt with classes and objects. Destructors are primarily employed as a tidying method in the programs, as a way to organize the code and implement the coding standards. Destructors are defined with ‘__del__()’ as the keyword in the python code

Take into mind that destroying an object with del is optional, you can create objects and never delete them. They are then only deleted when the program closes. However, this can eat up a lot of memory in large programs.

Generally, Python’s garbage collector which is used to detect these types of cyclic references would remove it but in this example the use of custom destructor marks this item as “uncollectable”.
Simply, it doesn’t know the order in which to destroy the objects, so it leaves them. Therefore, if your instances are involved in circular references they will live in memory for as long as the application run.

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