#### Overview of this book

Choosing the right data structure is pivotal to optimizing the performance and scalability of applications. This new edition of Hands-On Data Structures and Algorithms with Python will expand your understanding of key structures, including stacks, queues, and lists, and also show you how to apply priority queues and heaps in applications. You’ll learn how to analyze and compare Python algorithms, and understand which algorithms should be used for a problem based on running time and computational complexity. You will also become confident organizing your code in a manageable, consistent, and scalable way, which will boost your productivity as a Python developer. By the end of this Python book, you’ll be able to manipulate the most important data structures and algorithms to more efficiently store, organize, and access data in your applications.
Preface
Free Chapter
Python Data Types and Structures
Introduction to Algorithm Design
Algorithm Design Techniques and Strategies
Stacks and Queues
Trees
Heaps and Priority Queues
Hash Tables
Graphs and Algorithms
Searching
Sorting
Selection Algorithms
String Matching Algorithms
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Index

# Stacks and Queues

In this chapter, we will discuss two very important data structures: stacks and queues. Stacks and queues have many important applications, such as form operating system architecture, arithmetic expression evaluation, load balancing, managing printing jobs, and traversing data. In stack and queue data structures, the data is stored sequentially, like arrays and linked lists, but unlike arrays and linked lists, the data is handled in a specific order with certain constraints, which we will be discussing in detail in this chapter. Moreover, we will also examine how we can implement stacks and queues using linked lists and arrays.

In this chapter, we will discuss constraints and methods to handle the data in stacks and queues. We will also implement these data structures and learn how to apply different operations to these data structures in Python.

In this chapter, we will cover the following:

• How to implement stacks and queues using various methods...