Module 7 Overview

Module 7: Error Handling & I/O is about making your programs “real.” Real-world data is messy, files go missing, and networks fail. A good Python programmer anticipates these issues.

In this module, we will learn how to catch crashes before they happen using exceptions, how to read from and write to the file system, and how to work with common data formats like JSON and CSV.

Learning Objectives

By the end of this module, you will be able to:

• Anticipate and handle runtime errors using try/except blocks.
• Raise your own exceptions to enforce logic rules.
• Read and write text files using the open() function.
• Serialize data objects to JSON and CSV for storage or transfer.
• Master Context Managers (with statement) to ensure resources are always closed properly.

Module Contents

Exceptions Handling errors gracefully with try, except, else, and finally.

Raising Exceptions Triggering errors intentionally when things go wrong.

File Handling Reading and writing text files.

Data Serialization Working with structured data: JSON and CSV.

Context Managers The magic of the 'with' statement.