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What is a Python Linked List and Types of Linked List?

As we all know, Python is rapidly evolving. Therefore, we need to understand many things that are very basic and that everyone should be aware of. This blog will look at what a linked list is in Python, how it works, and the functions that can be applied to it. You've probably heard a lot of basic concepts that you should understand as a student, such as data types, strings, arrays, sorting techniques, tuples in Python, and so on. In this tutorial, we'll look at how to create a linked list in Python. So, let's start from the beginning.

Linked List in python

A linked list is a linear data structure in Python that stores data in contiguous memory locations rather than arrays of data items connected by links. In Python, each node in a linked list has a data field and a reference to the linked list's next node. In linked, each element is called a node, and pointers are used to connect them. The head of the linked list is the first node. The size of the linked list is flexible. We can have an endless number of nodes unless the device has enough storage. There are two types of linked lists, which we'll go over in this tutorial one by one.

In Python, a linked list is a node chain, with each node containing data and the address or reference to the next node. The head, which stores the reference to the first node, is the starting point of the linked list.

In Python, the linked list's head.

The first architectural item of the linked list is the 'head node,' or top node in the list. The Head is set to None when the list is first generated because there are no nodes in it. (Note that the linked list doesn't always require a node to begin, and the head option will default to None if one isn't provided.)

Python's Singly Linked List.

In Python, a single pointer connects the next node in a singly linked list to the linked list's next node. The data and pointer for each node in the linked list must be saved. The next pointer in the linked list's last node is null, indicating that the linked list has reached its conclusion.

Python's Doubly Linked List

A singly linked list or a linked list is easier to implement, but traversing it in reverse is far more complicated. To get around this, we can use a Doubly Linked List, in which each node has two pointers: one to point to the previous node and one to point to the next node.

In a doubly-linked list in Python, iteration is more efficient, especially if you need to repeat in reverse, and deletion of specific nodes is more efficient.

To summarise, a doubly linked list is a more sophisticated linked list in which each node has a pointer to the preceding and following nodes in the series. In a doubly-linked list, each node has node data, a piece of information to the next node (next pointer), and a pointer to the previous node (previous pointer) (previous pointer).

Conclusion

We've gone through the linked list and two types of linked lists in Python, singly and doubly-linked lists, in this blog. Although Linked Lists can be intimidating at first, if you get them, trees, graphs, and other data structures become much more understandable! In the future, keep a watch out for more Python-related blogs.

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