Chapter 18: Advanced Dictionary Functions in Python Programming
18.1 Introduction Dictionaries are one of the most powerful and flexible data structures in Python. While basic operations such as adding, removing, or updating key-value pairs are commonly used, Python also provides several advanced dictionary functions and techniques that enhance the efficiency and expressiveness of your code. This chapter explores these advanced capabilities, providing you with the tools to write more optimized and elegant Python programs. 18.2 Dictionary Comprehensions Dictionary comprehensions are a concise way to create dictionaries. Syntax: {key: value for key, value in iterable if condition} Example: squares = {x: x*x for x in range(6)} print(squares) Output: {0: 0, 1: 1, 2: 4, 3: 9, 4: 16, 5: 25} 18.3 The get() Method The get() method is used to access a dictionary value by key with a default value if the key is not found. person = {'name': 'Alice', 'age': 25} print(person.get('age')) # 25 p...