AI-Guided Tutorial: File Input/Output in Python

Learn how to read from and write to files in Python through interactive AI guidance. File operations are essential for data processing and persistence.

Learning Objectives

By the end of this tutorial, you should understand:

• How to open, read, and close files in Python
• Different file modes and when to use them
• Writing data to files safely
• Working with different file formats (text, CSV)
• Error handling for file operations
• Best practices for file management

Tutorial Instructions

Part 1: File Basics

1. Open VS Code and create file_io_tutorial.py
2. Ask Copilot Chat:

   How do I read and write files in Python? Show me the basics of opening files, reading content, and properly closing files.
   

Part 2: Reading Files

Ask Copilot Chat:

What are the different ways to read files in Python? Show me read(), readline(), readlines(), and reading with for loops. When should I use each method?

Practice Task: Create a text file and practice different reading methods.

Part 3: Writing Files

Ask Copilot Chat:

How do I write data to files in Python? Show me write() and writelines() methods, and explain the difference between 'w', 'a', and 'x' modes.

Practice Task: Create programs that write different types of data to files.

Part 4: File Modes and Context Managers

Ask Copilot Chat:

What are Python file modes and why should I use 'with' statements? Show me examples of different modes and proper file handling with context managers.

Practice Task: Rewrite your file operations using with statements.

Part 5: Working with CSV Files

Ask Copilot Chat:

How do I work with CSV files in Python? Show me how to read and write CSV data both manually and using the csv module.

Practice Task: Create a CSV file with student data and practice reading/writing it.

Part 6: File Path Operations

Ask Copilot Chat:

How do I work with file paths in Python? Show me how to check if files exist, create directories, and handle cross-platform paths.

Practice Task: Create a program that safely checks for and creates files/directories.

Part 7: Error Handling with Files

Ask Copilot Chat:

What errors can occur with file operations and how do I handle them? Show me try/except blocks for file operations.

Practice Task: Add error handling to your previous file programs.

Part 8: Advanced File Operations

Ask Copilot Chat:

Show me advanced file operations: reading binary files, working with JSON files, and processing large files efficiently.

Assessment Challenge

Create a Python program that:

• Reads data from a text file
• Processes the data (counting, filtering, transforming)
• Writes results to a new file
• Handles errors gracefully
• Uses proper file management techniques
• Works with both text and CSV formats

Reflection Questions

Ask Copilot Chat:

1. “What are the most common file operation mistakes and how can I avoid them?”
2. “When should I use different file reading methods?”
3. “How can I make my file operations more robust?”

Take a look at the FileIO lab and make sure you are prepared to work on this in class.