VS Code

How to Comment Out Multiple Lines in Python VSCode

November 30, 2024

Commenting out multiple lines in Python in VSCode is an essential skill for developers who need to temporarily disable sections of code or add detailed explanations.

Whether you are annotating complex sections of your script or troubleshooting issues, understanding how to efficiently manage comments can streamline your coding workflow.

In the realm of Python programming, utilizing multiline comments can improve code readability and make your scripts more maintainable.

VSCode, with its robust text editor functionalities and Python integration, offers straightforward methods to achieve this. By mastering these techniques, you will enhance your productivity and adhere to Python best practices.

By the end of this article, you’ll learn different methods for creating multiline comments in Python using VSCode’s keyboard shortcuts and built-in tools.

We will explore how to use Python’s triple quotes, dive into VSCode settings, and leverage extensions to make your coding experience seamless.

How to Comment Out Multiple Lines in Python VSCode: Quick Workflow

To comment out multiple lines of code in Python using Visual Studio Code (VSCode), you can follow these simple methods:

Keyboard Shortcuts

For Windows and Linux Users:
- Comment Out: Select the lines you want to comment and press Ctrl + /. This will add a # symbol at the beginning of each selected line, effectively commenting them out.
- Uncomment: To uncomment the lines, simply select them again and press Ctrl + / once more.
For Mac Users:
- Comment Out: Select the desired lines and press Cmd + /.
- Uncomment: Use the same shortcut (Cmd + /) to uncomment the lines.
Block Comments (Alternative):
- For Windows, you can also use Alt + Shift + A to create block comments. This will wrap the selected code in """ (triple quotes), which can serve as a multi-line comment in Python.
- On Mac, use Option + Shift + A for the same effect.

Additional Methods

Using Multi-Cursor Feature:
If you need to comment out non-contiguous lines, hold down the Alt key and click on each line you want to comment. Then, press Ctrl + / (or Cmd + / on Mac) to comment all selected lines simultaneously.
Using Docstrings:
Although not a conventional method, you can use triple quotes (""") to create a multi-line comment. This is more of a workaround since docstrings are intended for documentation purposes, but it can be useful for temporarily disabling blocks of code.

Summary

Using these shortcuts and methods in VSCode can significantly streamline your coding process by allowing you to easily manage comments in your Python scripts.

Commenting in Python

maxresdefault How to Comment Out Multiple Lines in Python VSCode

Types of Comments in Python

Single-line Comments

Python supports straightforward, single-line comments using the hash symbol (#). Place the hash symbol before any line of code or text to make Python ignore it during execution.

Multi-line Comments

Python doesn’t have a specific syntax for block comments. To comment multiple lines, you use either consecutive single-line comments or multi-line strings.

Creating Multi-line Comments in Python

Consecutive Single-line Comments with the Hash Symbol (#)

Start each line with a hash symbol (#). Python will treat each line as a separate single-line comment. Though it’s not syntactically different, it’s a practical way to comment out chunks of code.

# This is a multi-line comment
# Each line starts with a hash symbol
# And Python ignores all these lines

Using Triple Quotes (”’ or “””) as Multi-line Strings

Triple quotes can be used to create multi-line comments or strings. This method is less conventional because it’s intended for docstrings, not comments. However, it serves the purpose when needed. Use three single quotes (”’) or three double quotes (“””) to wrap the text.

"""
This is a comment spanning multiple lines.
It's actually a multi-line string, but Python ignores it
because it's not assigned to a variable.
"""

Best Practices for Python Commenting

When to Use Single-line vs. Multi-line Comments

Single-line comments are great for brief explanations or notes. Multi-line comments come in handy when explaining complex logic or code blocks. They provide a broader context, making your code easier to understand.

Keeping Comments Concise and Clear

Clarity trumps length. Concise comments communicate effectively without cluttering the code. Avoid overly detailed explanations that might confuse more than enlighten.

Aligning Comment Indentation with Code Structure

Align comments with the indented structure of your code. This practice maintains readability and keeps the code organized.

Techniques for Multi-line Comments in Python

Methods to Create Multi-line Comments in Python

Using Consecutive Hashes for Extended Explanations

One way to create multi-line comments is to use consecutive hash symbols. Each line starts with a #. Simple and effective.

# First line of the comment
# Second line of the comment
# Third line of the comment

This method maintains clarity and ensures every line is visibly marked as a comment. Ideal when jotting down extended explanations or notes.

Employing Triple Quotes for Block Comments

Triple quotes (''' or """) create what appears to be a multi-line comment, although it’s technically a string that isn’t assigned to any variable.

"""
This looks like a multi-line comment.
Python treats it as a string.
It's a useful trick to block out multiple lines at once.
"""

Useful for temporarily disabling a section of code. Triple quotes stand out but shouldn’t replace actual multiline comments or docstrings.

Alternative Commenting Approaches

Using the Backslash (\) for Visual Continuity in Single-line Comments

Split a single comment across multiple lines using a backslash (\) at the end of each line. Keeps your single comment visually continuous.

# This is a really long comment that spans multiple \
# lines by using a backslash at the end of each line.

Works well when you need to break up lengthy comments for better readability.

Avoiding Overuse of Comments by Refactoring Complex Code

Too many comments? They can clutter your code. Instead, refactor complex sections. Simplify the logic. Clear code requires fewer comments.

Restructure functions. Rename variables for clarity. Sometimes, code should speak for itself. Comments then become supplementary rather than necessary.

Docstrings for Documentation

Purpose of Docstrings in Python

Docstrings are descriptions. They explain the purpose and usage of a function, class, or module. Wrapped in triple quotes and placed immediately after definition lines.

def example_function():
    """
    This function does something.
    Here's more information about what it does.
    """
    pass

Docstrings provide an in-depth understanding of the expected behavior and parameters.

How Docstrings Differ from Standard Comments

Docstrings are meant for documentation. Comments clarify the code. While comments sit next to the code, docstrings can be accessed at runtime. Docstrings inform users, while comments guide developers.

Accessing Docstrings at Runtime for Documentation

Docstrings stay with the code. Retrieve them using the __doc__ attribute or help function. They enhance code documentation tools and IDEs. Essential for maintaining readable, well-documented codebases.

Commenting in Visual Studio Code (VS Code)

Line and Block Commenting in VS Code

Shortcut for Single-line Comments

Speed matters. In VS Code, swiftly comment a single line.

For Windows, press Ctrl + /.
For Mac, press Command + /.

No need to waste time. Just a quick combo, and you’re done.

Shortcut for Block Comments

Got a big chunk? Want to block it out at once?

For Windows, use Shift + Alt + A.
For Mac, go with Shift + Option + A.

Turn lines on or off without the hassle.

VS Code’s Multi-line Commenting Features

Using Keyboard Shortcuts for Toggling Comments

Toggle. Un-toggle. Repeat. It’s efficient.

Select the lines. Press the shortcut. Done.
Need them back? Press the same shortcut again. Easy.

Advantages of Block Comments in VS Code

Block comments help to:

Disable large segments quickly.
Maintain readability.
Avoid manual, line-by-line effort.

Great for debugging or when exploring alternative code paths.

Customizing Comment Shortcuts in VS Code

Accessing Keyboard Shortcuts in VS Code

Want to tweak things? Open the shortcuts settings.

Go to “Settings” in the menu.
Select “Keyboard Shortcuts”.
A whole world of configs awaits.

Reassigning Shortcut Keys for Comments

Not happy with the defaults? Make it personal.

Find the comment actions.
Click the pen icon.
Enter your preferred key combination.

You’re in control. Efficient coding, tailored to your style.

Multi-line Commenting in Various Integrated Development Environments (IDEs)

Using Shortcuts Across Common IDEs

PyCharm

Ah, PyCharm. It’s efficient, beloved by many. Commenting is a breeze.

For single-line comments, hit Ctrl + /.
Need block comments? Use Ctrl + Shift + /.

The shortcuts make toggling comments straightforward. Quickly switch between commenting styles. Simplifies code review or debugging.

Sublime Text

Sublime Text, the lightweight editor adored by many.

Single-line comments? It’s Ctrl + /.
Block comments? Go for Ctrl + Shift + /.

Its simplicity makes it powerful. Quicker edits, smoother workflow.

Python IDLE

Python IDLE – the classic.

Shortcuts vary with the operating system. It’s less consistent than modern IDEs.

Check the preferences. Find your OS-specific combination. Often a bit clunkier but gets the job done.

Comparison of Commenting Capabilities in IDEs

Feature Consistency in Code Editors vs. IDEs

Code editors like Sublime Text are simpler, lightweight. Consistent shortcuts make commenting easier.
IDEs like PyCharm or VSCode come packed with features. They offer extended functionality and customization.

Consistent shortcuts or extensive features? Each has its charm. Your choice defines your coding flow.

Enhancing Productivity through IDE Shortcut Mastery

Master those shortcuts. Know them by heart. Custom shortcuts? Yes, please.

Configure your tools. Make them work for you.

Practical Applications and Use Cases for Commenting Out Code

Commenting for Debugging and Testing

Isolating Code Blocks to Identify Issues

It’s the hunt for bugs. Dive in, comment out chunks of code.

Identify the trouble spots. Comment them out.
Run the code again. Did it work? Yes? You’re close. No? Keep digging.

Isolation helps track down issues without deleting parts of your script.

Temporarily Disabling Code for Alternative Testing

Testing alternatives? Maybe a different logic path?

Comment out the old code. Write the new one beside it.
Don’t lose your original. Compare the results. Easy switch back if needed.

Comments become a powerful debugging tool.

Using Comments for Code Documentation

Providing Detailed Explanations for Complex Functions

Complex functions need clarity. They can be a maze.

Use comments. Describe what’s happening inside.
Explain the parameters, the purpose, the process.

A well-placed comment can make a difference.

Organizing Code with Section Breaks and Labels

Code can get lengthy. Messy, even.

Break it up with comments. Sections, labels, markers.
Easy navigation. Improved readability.

Commenting for Version Control and Code Retention

Retaining Code for Future Reference

Got some code you might need later? Don’t delete it.

Comment it out. Keep it in the file. Accessible, but out of the way.
Future-you will thank present-you.

Comparing Versions Through Commented Sections

Track changes within the code. Comment out the old, write the new.

Compare results by toggling comments.
See what worked. Analyze changes.

Strategies for Effective Commenting

Optimizing Comments for Readability and Maintenance

Writing Clear, Specific Comments for Functionality Explanations

Communicate intent.

Explain why something is done, not just what it does.

# Calculate the final price with tax included

Specificity over ambiguity.

Avoiding Redundant or Excessive Commenting

Less can be more. Redundant comments clutter your code.

# Increment i by 1
i += 1  # Unnecessary comment

Focus on meaningful insights. Skip the obvious.

Indentation and Formatting Best Practices

Aligning Comments with Code for Enhanced Readability

Consistency is key. Align comments with the code’s indentation.

if condition:
    # This block handles the valid scenario
    execute_function()
else:
    # Handle the error
    log_error()

Aligned comments maintain readability.

Structuring Multi-line Comments for Consistency

Multi-line comments should flow.

"""
This is a well-structured multi-line comment.
It explains the overall concept
in a coherent manner.
"""

Keep them consistent and tidy.

Reviewing and Updating Comments

Keeping Comments Updated with Code Changes

Your code evolves. So should your comments.

Stale comments mislead. Keep them current.

# Old comment: This function validates user input
def new_function():
    validate_input()
    process_data()

Regular updates ensure relevance.

Regularly Reviewing Code for Outdated or Irrelevant Comments

Spring cleaning for your code.

Review comments often. Remove what’s outdated.

# This API integration was deprecated

Continuous review keeps everything fresh.

FAQ on How To Comment Out Multiple Lines In Python In VSCode

How do I comment out multiple lines in Python using VSCode?

To comment out multiple lines, select the lines you want to comment, then press Ctrl + / on Windows or Cmd + / on macOS. This keyboard shortcut toggles the comment status of the selected lines, making code annotation quick and straightforward.

Can I use triple quotes for commenting out multiple lines in Python?

Yes, triple quotes (''' or """) can be used to comment out multiple lines. However, they are typically used for docstrings. They disable the code temporarily, but remember that they are technically treated as multiline strings, not comments.

Is there a way to customize keyboard shortcuts in VSCode for commenting?

Absolutely. You can customize keyboard shortcuts by going to File > Preferences > Keyboard Shortcuts. Look for the command "Toggle Line Comment" and set your preferred keys. This allows you to tailor the editor to fit your coding habits better.

What extensions can help me with commenting in Python?

Check out the Python extension for Visual Studio Code by Microsoft. It offers features like syntax highlighting and code analysis, which simplify commenting. Another helpful extension is Better Comments, which enhances code readability by adding different colors and styles to comments.

How can I improve the readability of my comments in Python?

Use consistent formatting and clear documentation. For block comments, make sure each comment explains the relevant section of code.

Avoid using too many inline comments; instead, structure your comments to provide context where necessary, improving overall readability and maintainability.

Are there different types of comments I should use?

Yes, Python supports single-line comments using # and multiline comments using triple quotes. Single-line comments are more common for brief explanations, while block comments or docstrings are used for detailed descriptions or documentation within functions and classes.

How do I uncomment multiple lines in Python in VSCode?

To uncomment multiple lines, select the lines you want to uncomment, then press Ctrl + / on Windows or Cmd + / on macOS again. This action toggles the comment state, enabling or disabling comments as needed.

Does commenting out code affect performance in VSCode?

Commented-out code does not execute, so it has no impact on performance. However, excessive commented-out code can lead to clutter, making your scripts harder to navigate and maintain. It’s a good habit to remove obsolete comments from your final code.

Why are my comments not showing in the integrated terminal?

Comments are a part of your code, not output. They are visible only in the editor and serve as notes or documentation for you or other developers working on the code. They will not show up in the terminal unless part of a print statement.

What are the best practices for commenting Python code in VSCode?

Keep comments clear and concise. Use them to explain why certain decisions were made in your code rather than what the code does. Ensure your comments are up to date with any code changes. Using tools like pylint can help enforce good commenting practices.

Conclusion

Learning how to comment out multiple lines in Python in VSCode is an invaluable skill for any developer working with Python in this powerful text editor. Throughout this guide, we’ve explored various methods available in VSCode such as using triple quotes for block comments and employing keyboard shortcuts for quick commenting.

Key takeaways:

Triple Quotes: Use ''' or """ to effectively disable sections of your Python code.
Keyboard Shortcuts: Ctrl + / on Windows or Cmd + / on macOS to toggle comments.
Extensions: Utilize tools like Better Comments to enhance comment readability.
Customization: Customize your keyboard shortcuts in VSCode for even more control.
Best Practices: Keep your comments clear and relevant.

By mastering these techniques, you can ensure your Python code is well-documented, easier to navigate, and maintainable. Whether you’re debugging, annotating, or simply making your code reader-friendly, these methods are essential for efficient coding in VSCode. Happy coding!

Author
Recent Posts

Bogdan Sandu

Bogdan is a seasoned web designer and tech strategist, with a keen eye on emerging industry trends.

With over a decade in the tech field, Bogdan blends technical expertise with insights on business innovation in technology.

A regular contributor to TMS Outsource's blog, where you'll find sharp analyses on software development, tech business strategies, and global tech dynamics.