The Role of super() in Python

In Python, super() is used to call methods (including the constructor __init__()) from a parent or sibling class. This is particularly useful in multiple inheritance scenarios where the method resolution order (MRO) determines the order in which parent classes are searched for a method. Using super() avoids explicitly naming the parent class, making the code more flexible and easier to maintain [[2]].

However, correctly using super() with different argument signatures in __init__() methods can be tricky. Some examples demonstrating the “correct” way of calling super when handling __init__ methods that expect different arguments may not work as was to be expected [[1]]. Understanding the MRO and how super() interacts with it is essential for avoiding unexpected behavior.

Using super() avoids explicitly naming the parent class, making the code more flexible.

super() in Java: Calling the Parent Constructor

In Java, super() is primarily used to call the constructor of the parent class. This is necessary to ensure that the parent class’s initialization logic is executed before the subclass’s initialization. If a subclass constructor doesn’t explicitly call super(), the Java compiler automatically inserts a call to the parent class’s no-argument constructor. However, if the parent class doesn’t have a no-argument constructor, the subclass must explicitly call one of the parent’s constructors using super(arguments) [[3]].