Python File Handling Complete Guide || AI With Ali Husnain

Is your Python data vanishing when you close the program? 😱 In our "Python Zero to Hero" series, we fix this common problem!

Today, we master **File Handling**. You will learn how to make your Python programs "remember" data by saving it into Text (.txt) and CSV files. We cover everything from the basic `open()` function to the professional `with` statement and preventing crashes with Error Handling.

📂 *Source Code & Notes:* https://github.com/AiWithAlihusnain/Y...
📸 *Follow on Instagram:*   / ai_with_ali_huanain  

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⏳ *Timestamps:*
0:00 - Data Gayab? The Problem with RAM
0:40 - Why File Handling is Important?
1:40 - Types of Files (Text vs CSV)
3:00 - File Modes Explained (r, w, a)
5:00 - How to Read Files in Python
7:00 - How to Write Files (Warning! ⚠️)
9:00 - Appending Data (The Safe Way)
10:30 - The 'with' Statement (Professional Trick)
12:00 - Handling CSV Files (Excel Data)
14:30 - Common Errors (FileNotFound, etc.)
17:00 - Try/Except Error Handling
18:30 - Real World Examples (Login, To-Do)
20:00 - Conclusion & Homework

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🔥 *What you will learn in this video:*
Difference between RAM (Volatile) and HDD (Permanent).
How to create, read, and update files using Python.
The difference between `write()` and `append()`.
How to handle Excel-like data using the `csv` module.
How to write crash-proof code using `try-except`.

💡 *Homework Question:*
Write a Python program to save your best friend's name in a file called `friends.txt`. Paste your code in the comments!

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