📁 Module 10: File & I/O

Files are how programs persist data and exchange information with the outside world. In Python, most file operations revolve around the built-in open() function and using context managers (with) to ensure files are closed properly.

Estimated Time: 4-6 hours \ Prerequisites: Module 01 (Foundations) \ Level: ⭐⭐ Beginner → Intermediate

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📚 Topics Covered

#	Topic	Description	Key Concepts
01	Reading Files	Open and read text safely	encodings, iterating lines, with open(...)
02	Writing Files	Create, overwrite, append	modes (w, a), newline handling
03	Working with JSON	Read/write structured data	json.dumps, json.load, validation
04	Working with CSV	Tabular data	csv.reader, DictReader, DictWriter
05	Binary Files	Read/write bytes	rb/wb, hashing, chunked IO

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🎯 Learning Goals

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

• Read and write text files using a context manager.
• Understand file modes (r, w, a, rb, wb) and when to use them.
• Serialize/deserialize data using JSON.
• Parse and generate CSV files in a platform-safe way (newline='').
• Work with binary data and compute checksums/hashes efficiently.

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📂 Module Structure

10_file_io/
├── README.md
├── 01_reading_files/
│   ├── README.md
│   ├── examples.py
│   ├── exercises.py
│   └── quiz.md
├── 02_writing_files/
│   ├── README.md
│   ├── examples.py
│   ├── exercises.py
│   └── quiz.md
├── 03_working_with_json/
│   ├── README.md
│   ├── examples.py
│   ├── exercises.py
│   └── quiz.md
├── 04_working_with_csv/
│   ├── README.md
│   ├── examples.py
│   ├── exercises.py
│   └── quiz.md
└── 05_binary_files/
    ├── README.md
    ├── examples.py
    ├── exercises.py
    └── quiz.md

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Start here: 01_reading_files