4 Python Append mode
1. What is Append Mode?
Append mode is used to add new data at the end of a file.
In simple words:
👉 Append means add, not delete
👉 Old data stays safe
👉 New data goes at the bottom
Append mode uses "a".
2. Why Use Append Mode?
Use append mode when:
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You want to add logs
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You want to save history
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You don’t want to lose old data
3. Simple Append Example
Example
👉 Old data remains unchanged.
4. Append User Input
Example
5. Append Multiple Lines
Example
6. Append Inside a Loop
Example
7. Append and Then Read
Example
8. File Created Automatically
If the file does not exist, append mode creates the file.
Example
9. Common Beginner Mistakes
❌ Forgetting New Line
✔ Use:
❌ Using "w" Instead of "a"
❌ Deletes old data.
10. Append Mode vs Write Mode
Append ("a") |
Write ("w") |
|---|---|
| Adds data | Deletes old data |
| Safe | Risky |
| Keeps file content | Replaces file content |
11. Simple Practice Examples
Example 1: Save Scores
Example 2: Daily Log
Example 3: Add Messages
12. Summary (Python Append Mode)
✔ Append mode adds data
✔ Old data is safe
✔ Uses "a" mode
✔ Creates file if missing
✔ Very useful for logs
📘 Perfect for Beginner eBook
This chapter is ideal for:
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Python beginner books
-
School & college students
-
Self-learners
If you want next, I can write:
-
File Modes Explained
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CSV File Handling
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JSON File Handling
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Mini Python Projects
Just tell me 😊
