README.md

Module 062: Context Managers and the with Statement

• Phase: 7. Modules, Stdlib & Testing
• Duration: 1.5 hours

Learning Objectives

• Understand the with statement protocol (__enter__, __exit__)
• Write custom class-based context managers
• Use the contextlib.contextmanager decorator for generator-based managers
• Apply context managers to files, locks, database connections, and settings

Topics Covered

• with statement syntax and motivation
• The context manager protocol: __enter__ and __exit__
• Class-based context managers
• contextlib.contextmanager decorator (generator-based)
• Exception handling inside __exit__
• Practical uses: file handles, threading locks, temporary settings

Prerequisites

Module 061: Working with JSON

Next Module

Module 063: Modules and Imports