README.md

Module 024: Dictionaries: Advanced (Nesting, Methods, Comprehensions)

Phase: 3. Data Structures
Estimated Time: 2 hours
Milestone: No

Overview

Build on basic dictionary skills with nesting, powerful dictionary methods, comprehensions, merging, and defaultdict.

Topics

• Nested dicts
• Dict methods: keys(), values(), items(), update(), pop(), setdefault(), fromkeys()
• Dict comprehensions
• Merging dicts with | operator (Python 3.9+)
• defaultdict (brief introduction)

Learning Objectives

• Work with nested dictionaries (dicts within dicts)
• Use advanced dict methods for manipulation
• Write concise dict comprehensions
• Merge dictionaries using the | operator
• Use defaultdict for default values

Prerequisites

• Modules 000–023

Next Module

Module 025: Mutability vs Immutability