Summarize this article with:
Debugging would be painful without comments. Knowing how to comment out multiple lines in Python in VSCode turns a tedious task into a two-second shortcut.
Python lacks native block comment syntax like JavaScript or C++. This catches many developers off guard.
VSCode solves this with keyboard shortcuts and the toggle line comment function that adds hash symbols to entire code blocks instantly.
This guide covers four methods: the Ctrl + / shortcut, triple quote syntax, manual commenting, and customizing your keybindings.
You will learn which method works best for quick debugging versus long-term documentation in your Python projects.
How to Comment Out Multiple Lines in Python in VSCode
Commenting out multiple lines in Python in VSCode is the process of adding hash symbols (#) to disable code blocks without deleting them.
Developers need this when debugging scripts, testing functions, or adding documentation to their codebase.
This guide covers 4 methods requiring 2 minutes and basic familiarity with Visual Studio Code.
Prerequisites
Required software:
- VSCode version 1.60 or later
- Python extension for VSCode (Microsoft, v2024.0+)
- Python 3.x installed on your system
Before you start:
- Open a .py file in the editor
- Verify Python interpreter is selected (bottom status bar)
- Time estimate: 2 minutes
If you need help with initial setup, check how to run Python in VSCode first.
Step One: How Do You Select Multiple Lines of Code in VSCode?
Click at the start of the first line, hold Shift, then click at the end of the last line to highlight the code block you want to comment.
The selected text appears highlighted in blue. You can also click line numbers in the gutter to select entire lines instantly.
Action
Mouse method: Click and drag from line 1 to line 10 in your Python file.
Keyboard method (Windows/Linux): Ctrl + Shift + Down Arrow to extend selection line by line.
Keyboard method (macOS): Cmd + Shift + Down Arrow.
The process works the same way as when you indent multiple lines in VSCode.
Purpose
Selection must happen before the toggle comment shortcut works. No selection means only the current cursor line gets commented.
Step Two: How Do You Apply the Block Comment Shortcut?
Press Ctrl + / on Windows and Linux or Cmd + / on macOS to instantly add the hash symbol prefix to every selected line.
The keyboard shortcut triggers the editor.action.commentLine function. Each line receives a # character at the beginning, and syntax highlighting changes to show comment formatting.
Action
Windows/Linux shortcut: Ctrl + / (forward slash key)
macOS shortcut: Cmd + / (forward slash key)
Alternative menu path: Edit > Toggle Line Comment
Expected result: All selected lines now start with # and appear grayed out or in a different color depending on your theme.
Purpose
This toggle comment function lets you quickly disable code during debugging sessions without permanent deletion.
The same shortcut handles both commenting and uncommenting, making it the fastest method for Python developers. For more commenting options across different file types, see the guide on how to comment in VSCode.
Step Three: How Do You Use Multi-line String Syntax as Alternative Comments?
Wrap your code block with triple quotes (”’ or “””) to create a multiline string literal that Python’s interpreter ignores during execution.
This technique converts code into an unassigned string. Not a true comment, but it achieves the same result of disabling code.
Action
Step 1: Position cursor before the first line of code to disable.
Step 2: Type three single quotes (”’) or three double quotes (“””).
Step 3: Navigate to after the last line of code.
Step 4: Type matching triple quotes to close.
Example syntax:
“ ''' print("This line won't execute") print("Neither will this one") ''' `
Purpose
Triple quote method works best for longer documentation blocks or when you want to preserve code as a docstring reference.
Many developers prefer this for temporary disabling during the code review process since it visually groups the disabled section.
Step Four: How Do You Uncomment Multiple Lines in VSCode?
Select the commented lines and press the same Ctrl + / (Windows/Linux) or Cmd + / (macOS) shortcut to remove all hash symbols instantly.
The toggle comment action works both ways. One press adds comments, another press removes them.
Action
Step 1: Highlight all lines starting with # that you want to restore.
Step 2: Press Ctrl + / or Cmd + / depending on your operating system.
Step 3: Verify the # characters are gone and syntax highlighting returns to normal.
Purpose
Quick uncommenting saves time during debugging Python in VSCode when you need to re-enable code sections rapidly.
Verification
Run your Python file to confirm commented code is ignored by the interpreter.
Check these indicators:
- Commented lines appear grayed out or in a distinct comment color
- No syntax errors from the commented section
- Output excludes any print statements inside comments
Open the terminal in VSCode and run python filename.py to test execution.
Troubleshooting
Issue: Shortcut Not Working
Solution: Open File > Preferences > Keyboard Shortcuts, search for “Toggle Line Comment”, verify the binding is Ctrl + / or reset to default.
You can also check your keybindings directly in settings.json in VSCode.
Issue: Wrong Comment Style Applied
Solution: Check the bottom status bar to confirm the file is recognized as Python, not plain text.
If it shows “Plain Text”, click it and select Python. You may need to change the Python interpreter in VSCode if language detection fails.
Issue: Indentation Problems After Commenting
Solution: Use Shift + Alt + F (Windows/Linux) or Shift + Option + F (macOS) to format the document.
Learn more about how to format code in VSCode for consistent styling.
Alternative Methods Comparison
| Method | Time | Best For | | — | — | — | | Ctrl + / shortcut | 2 seconds | Quick toggling, any line count | | Triple quotes (”’ or “””) | 5 seconds | Docstrings, documentation blocks | | Manual # on each line | 10+ seconds | Single lines, precision control |
Choose the keyboard shortcut method for daily coding tasks. Reserve triple quotes for code you want to preserve as documentation.
The toggle line comment approach aligns with software development best practices for clean, maintainable code.
Related Processes
Once you master commenting, explore these related VSCode skills:
- Find and replace in VSCode for bulk code changes
- Autoformat in VSCode to maintain consistent style
- Compare two files in VSCode when reviewing changes
- Run pytest in VSCode for unit testing your code
For larger projects, proper commenting supports code refactoring and keeps your technical documentation clear.
FAQ on How To Comment Out Multiple Lines In Python In VSCode
What is the keyboard shortcut to comment multiple lines in Python in VSCode?
Press Ctrl + / on Windows and Linux or Cmd + / on macOS. Select the lines first, then apply the shortcut. This toggle line comment function adds or removes hash symbols from every selected line instantly.
Does Python have a native multiline comment syntax?
No. Python only supports single-line comments using the hash symbol (#). Unlike JavaScript or C++ with block comment syntax, Python requires commenting each line individually or using triple quotes as a workaround.
What is the difference between triple quotes and hash comments in Python?
Hash comments (#) are true comments ignored by the interpreter. Triple quotes (”’ or “””) create multiline string literals that Python processes but does not execute unless assigned to a variable.
Can I customize the comment shortcut in VSCode?
Yes. Open File > Preferences > Keyboard Shortcuts and search for “Toggle Line Comment.” Click the existing binding and press your preferred key combination. Changes apply immediately to your production environment and local setup.
Why does Ctrl + / add slashes instead of hash symbols?
VSCode is not recognizing your file as Python. Check the language mode in the bottom status bar. Click it and select “Python” to enable correct comment syntax with the hash character prefix.
How do I uncomment multiple lines in VSCode?
Select the commented lines and press the same shortcut: Ctrl + / or Cmd + /. The toggle action removes all hash symbols. This works regardless of how you originally added the comments.
Is there a way to comment non-consecutive lines at once?
Hold Alt (Windows/Linux) or Option (macOS) and click each line to create multiple cursors. Then press Ctrl + / or Cmd + /. Each cursor position receives the comment toggle independently.
What is the menu path for commenting if shortcuts fail?
Navigate to Edit > Toggle Line Comment for single-line style or Edit > Toggle Block Comment for block style. The menu path works when keyboard shortcuts conflict with other extensions or system settings.
Do comments affect Python script performance?
No. The Python interpreter ignores all comments during execution. Comments exist only in your source code for readability. They do not impact runtime speed, memory usage, or software reliability.
Which commenting method is best for temporary debugging?
Use the Ctrl + / keyboard shortcut for debugging. It toggles quickly and maintains proper Python syntax. Reserve triple quotes for docstrings and permanent documentation blocks in your software development process.
Conclusion
Learning how to comment out multiple lines in Python in VSCode takes minutes but saves hours during debugging sessions.
The Ctrl + / and Cmd + / shortcuts handle most situations. Triple quotes work better for docstrings and longer documentation blocks.
Customize your keybindings if the defaults conflict with other extensions.
Clean commenting habits improve code readability and maintainability across your projects.
They also make collaboration easier when teammates review your Python scripts.
Practice the multi-cursor technique for non-consecutive lines. Master the toggle action for rapid uncommenting.
These small efficiencies compound over time, especially when paired with linting and source control workflows.
Your future self will thank you for writing well-commented code.
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