3 Python Writing files
1. What Does Writing a File Mean?
Writing a file means saving data into a file using Python.
In simple words:
👉 Python opens a file
👉 Writes text into it
👉 Saves the data permanently
2. File Write Modes
We mainly use these modes:
| Mode | Meaning |
|---|---|
"w" |
Write (overwrite file) |
"a" |
Append (add to file) |
"x" |
Create new file |
3. Write to a File ("w" Mode)
⚠️ "w" mode deletes old data.
Example
4. Best Way: Write Using with
This is the recommended way.
Example
5. Write Multiple Lines
Example
6. Append to a File ("a" Mode)
Adds text without removing old content.
Example
7. Write List Data to File
Example
8. Write User Input to File
Example
9. Create New File ("x" Mode)
Example
10. Write File Safely Using Try Except
Example
11. Common Beginner Mistakes
❌ Forgetting New Line
✔ Use:
❌ Writing in Read Mode
❌ Error.
12. Simple Practice Examples
Example 1: Save Numbers
Example 2: Append Log
Example 3: Write Marks
13. Summary (Python Writing Files)
✔ Writing saves data to file
✔ "w" overwrites file
✔ "a" adds data
✔ "x" creates new file
✔ Use with for safety
📘 Perfect for Beginner eBook
This chapter is ideal for:
-
Python beginner books
-
School & college students
-
Self-learners
If you want next, I can write:
-
Appending Files
-
CSV File Handling
-
JSON File Handling
-
Mini Python Projects
Just tell me 😊
