How to Comment in PyCharm for Efficiency

Commenting in PyCharm streamlines and elevates your Python programming workflow. Whether you’re a seasoned developer or newly navigating PyCharm, understanding how to comment in PyCharm is crucial for code readability and maintenance.
Comments serve as an essential aspect of code documentation, helping you and others quickly grasp the functionality of the code blocks.
With PyCharm, you have various options to comment your code—single-line comments, multiline comments, and block comments—each enhancing your script’s clarity and organization.
Employing these effectively will make your Python programming more efficient and your code easier to navigate, inspect, and review.
By the end of this article, you’ll learn:
- The fastest keyboard shortcuts for commenting.
- How to toggle comments for code snippets.
- Best practices for using comments in your Python projects.
Dive in to master commenting in PyCharm and enhance your coding experience with practical, easy-to-follow strategies. Your journey towards more organized and readable code begins here.
How To Comment In PyCharm: Quick Workflow
To comment and uncomment code in PyCharm, you can utilize several methods, primarily using keyboard shortcuts. Here’s a concise guide on how to do it effectively:
Commenting and Uncommenting Lines
Single Line Comments
- Windows/Linux: Place the cursor on the line you want to comment and press
Ctrl + /
. This will add a#
at the beginning of the line. Pressing the same combination again will uncomment it. - macOS: Use
Command + /
for the same functionality.
Multiple Lines Comments
- Select the lines you wish to comment.
- Use the same shortcut:
- Windows/Linux:
Ctrl + /
- macOS:
Command + /
- Windows/Linux:
- This will prepend a
#
to each selected line. To uncomment, repeat the same shortcut.
Alternative Method for Multiple Lines
- You can also right-click on the selected lines and choose “Comment with Line Comment” from the context menu.
Creating Documentation Comments
For documentation comments (docstrings) in Python:
- Place your cursor after a function definition and type triple quotes (
"""
). PressEnter
orSpace
, and PyCharm will generate a docstring stub for you.
Customizing Shortcuts
If you want to change or customize these shortcuts:
- Go to File > Settings (or Preferences on macOS).
- Navigate to Keymap.
- Search for “Comment with Line Comment” or “Comment with Block Comment” and assign your preferred key combination.
Methods of Commenting Out Multiple Lines in Python
Using the Hash Character (#)
Single-line comments in Python start with the hash symbol (#
). This simple character tells Python to ignore the rest of the line, making it an effective way to comment.
Single-Line Comments Explained
Single-line comments make code easy to understand, allowing for brief annotations. They are handy for quick explanations, temporary notes, or debugging.
How to Comment Out Multiple Lines with Consecutive Single-Line Comments
When you need to comment out several lines at once, you can place a #
at the beginning of each line. This method ensures that Python skips these lines during execution.
# This is a single-line comment
# This is another line being commented out
# And yet another one
def example_function():
pass
Using consecutive single-line comments is helpful when temporarily disabling parts of your code during debugging. It also keeps your code clean and maintainable.
Practical Examples and Scenarios for Using the Hash Method
The hash method is widely adopted for scenarios requiring selective commenting out of specific lines within a block of code.
Example:
def process_data(data):
# Process step 1
# cleaned_data = clean_data(data)
# Process step 2
# transformed_data = transform_data(cleaned_data)
# Process step 3
# result = analyze_data(transformed_data)
return result
In this example, each processing step is commented out for testing purposes. This approach helps isolate issues or focus on specific code parts.
Using Triple Quotes
Triple quotes in Python ('''
or """
) are typically used for multi-line strings, known as docstrings. They can also comment out blocks of code, albeit indirectly.
Explanation of Multi-line Strings (Docstrings) as Comments
Multi-line strings, enclosed in triple quotes, are primarily designed for documentation. They aren’t comments per se but can be misused to achieve a similar effect.
"""
This whole block is a multi-line string and thus ignored by Python
def function_not_executed():
pass
"""
Differences Between Comments and Docstrings
Comments (#
) are never executed by Python, whereas docstrings, though usually ignored, are stored as documentation strings for functions, methods, classes, or modules.
Examples of Using Triple Quotes for Multi-line Commenting
"""
def should_not_run():
print("This function is commented out using triple quotes and won't execute")
"""
This example shows a function commented out, which Python interprets as a multi-line string.
When to Avoid Using Triple Quotes for Commenting
Triple quotes should not replace traditional comments for multiple reasons:
- Documentation Purpose: Docstrings are for explaining code, not disabling it.
- Visibility: Using hashes makes it clear that these lines are comments.
- Performance: Interpreting large blocks of commented code as strings might impact performance.
Commenting in Integrated Development Environments (IDEs)
Benefits of Using IDEs for Commenting
Faster commenting with shortcuts makes working with code a breeze. No need to type #
repeatedly; let the IDE do the heavy lifting with a simple keypress.
Improved code organization is another huge plus. IDEs keep your comments neatly aligned with the code, enhancing readability and structure.
Popular IDEs and Their Commenting Features
Visual Studio Code
- Shortcut keys:
Ctrl + /
(Windows/Linux) andCommand + /
(Mac). - Toggle commenting for multiple lines is seamless. Highlight the lines, press the shortcut, and you’re done.
PyCharm

- Shortcut keys:
Ctrl + /
andCtrl + Shift + /
. - Supports block comments and line comments. These features make it straightforward to learn how to comment in PyCharm effectively.
Sublime Text
- Shortcut keys: Fast and intuitive for both commenting and uncommenting. The commands ensure smooth transitions between states.
Jupyter Notebook
- Shortcut keys: Quick toggling options for commenting and uncommenting code blocks. A great help when working in notebooks.
Thonny and Atom
- Additional IDE-specific features: Both offer unique shortcuts and functionalities that can speed up your commenting workflow, adding efficiency to your coding sessions.
Benefits of Commenting Out Multiple Lines
Debugging and Testing
Temporarily disabling code for error isolation is a game-changer. Commenting out chunks of code lets you pinpoint the exact source of an issue without removing it entirely. You can quickly toggle sections on and off, making error tracking more efficient.
Simplifying testing by running specific sections brings clarity. Instead of running the entire codebase, you can focus on isolated parts. It’s like dissecting the problem, bit by bit, running only what’s necessary to validate functionality.
Documentation and Collaboration
Explaining complex logic for team members is vital. Multi-line comments can break down intricate pieces of code, offering explanations that make sense to everyone involved. Think of it as adding a guide to your labyrinth of logic, helping others traverse it without confusion.
Providing context for future revisions saves time in the long run. Adding comments that explain the ‘why’ behind the code ensures that future you—or anyone else revisiting the project—understands the thought process and can continue where you left off without the guesswork.
Code Organization and Maintenance
Highlighting experimental or alternative code within your project. You might be working on several approaches to solve a problem. By commenting out different versions, you keep them all accessible without cluttering your executable code.
Keeping old code for reference without affecting functionality ensures that nothing is lost to time. When you iterate on functionality but still want to keep previous versions, commenting them out keeps them handy. This way, if something new breaks unexpectedly, you have a fallback ready to go.
Version Control
Preserving older versions of the code for easy rollback makes life easier. The ability to comment out different sections and retain them within your codebase proves invaluable. No need to dig through version control histories or backups—you have all necessary iterations right there within your file, just a few uncommented lines away from coming back to life.
Best Practices for Multi-line Commenting in Python
Conciseness and Clarity
Writing clear and relevant comments—let’s make it simple. When you comment, be direct. The goal is to ensure anyone reading the code gets it instantly.
Avoid clutter. Unnecessary phrases? Ditch them.
Avoiding unnecessary jargon is crucial. Don’t try to impress with fancy words. Keep it straightforward. Your comments should be as readable as the code itself.
Formatting and Indentation
Aligning comments with the surrounding code is more than just aesthetic. Proper alignment helps in understanding the context. It ensures that the commented lines don’t disrupt the flow when someone reads your code.
Adhere to consistency with style guides (e.g., PEP 8). Python’s PEP 8 provides a style guide that can become your best friend. Consistent formatting across a codebase is invaluable. It’s not just about readability; it’s about maintainability.
Keeping Comments Updated
Revising comments to reflect changes in code is a non-negotiable. If the code changes, so should the comments. An outdated comment is worse than no comment—it can mislead and confuse.
Avoiding outdated or misleading comments is key. Keep it relevant. Outdated comments are like landmines in your code—they can lead developers down the wrong path.
Use of Comments vs. Docstrings
Employing comments for temporary notes or code disabling makes sense. Temporary changes? Comment them out. Need to implement a quick fix but don’t want to lose the original code? Comment it.
Save docstrings for structured documentation. Docstrings provide a detailed explanation for functions, methods, classes, or modules. They’re designed for documentation, not for casual notes or quick fixes.
Advanced Techniques for Efficient Commenting
Combining Methods
Using both hash symbols and triple quotes strategically can be a lifesaver. Sometimes, a mix of single-line comments and multi-line quotes can efficiently comment out chunks of code during development.
# This function is skipped
"""
def unused_function():
pass
"""
# Back to active code
def active_function():
pass
Strategic use means more flexibility. You decide what stays readable and what hides in plain sight.
Employing IDE shortcuts alongside manual commenting is another trick. Imagine using a tool like PyCharm, which makes it a breeze.
Ctrl + / comments out lines quickly, while Ctrl + Shift + / handles block comments. Knowing how to comment in PyCharm can turn you into a code ninja. Don’t waste time; let the shortcuts work their magic.
Leveraging Plugins and Extensions
Exploring third-party tools for advanced commenting features opens up new possibilities. IDEs like Visual Studio Code or Sublime Text have a plethora of extensions ready to make your life easier.
Check out plugins that offer:
- Color-coded comments
- Hierarchical commenting
- Advanced toggling options
Automating repetitive commenting tasks saves those precious minutes. Plugins can pre-format your comments, append templates, or even integrate with version control systems.
Automation tools can do the heavy lifting, leaving you with more time to focus on the creative aspects of coding.
Avoiding Common Pitfalls
Misusing docstrings for comments is a minefield. Docstrings are for documentation, not for temporarily taking out code. They’re stored as multi-line strings and can confuse if used incorrectly.
Keep docstrings for explaining classes, methods, and functions. Use hash symbols for coding notes.
Overloading code with redundant or excessive comments is just… no. It creates noise. More comments don’t equal better understanding. Aim for quality over quantity.
FAQ on How To Comment In PyCharm
How do I comment a single line in PyCharm?
Use the keyboard shortcut Ctrl + /
on Windows/Linux or Cmd + /
on macOS. This quick combo toggles a single-line comment in PyCharm. It’s an essential tool for adding inline comments and ensuring your Python code is clear and easy to understand.
How do I comment multiple lines in PyCharm?
Highlight the lines you want to comment, then use Ctrl + Shift + /
on Windows/Linux or Cmd + Option + /
on macOS. This adds block comments, streamlining code annotation and aiding in code maintenance and documentation.
Can I uncomment code in PyCharm easily?
Yes, the same shortcuts for commenting, Ctrl + /
or Cmd + /
, also work for uncommenting. Highlight the portion and use the combo to toggle between commented and uncommented states. This feature helps maintain code clarity and organization.
How do I use docstrings to comment in PyCharm?
Docstrings are enclosed in triple quotes '''
or """
. Place them at the start of your functions, classes, or modules to describe their purpose. Docstrings are a key part of code documentation and Python coding practices.
Are there plugins to enhance commenting in PyCharm?
Yes, several plugins like “Comments Highlighter” can enhance the commenting features in PyCharm, making it easier to identify and manage comments in your code. These tools can improve programming efficiency.
How can I make my comments more effective in PyCharm?
Keep comments concise and informative. Use them to explain why, not necessarily what, the code does. Good commenting practices align with maintaining high code quality and readability.
Can I customize the comment style in PyCharm?
Yes, navigate to Settings > Editor > Code Style. Here, you can configure the appearance of comments to better fit your code formatting standards and preferences, enhancing your overall software development experience.
How do I comment out a block of code quickly in PyCharm?
Highlight the block, then use Ctrl + Shift + /
(Windows/Linux) or Cmd + Option + /
(macOS). This shortcut is invaluable for temporarily disabling sections of your Python script during code inspection or testing.
Does PyCharm support different comment formats for various languages?
Absolutely. PyCharm automatically recognizes and implements the correct comment syntax for different programming languages, whether you’re writing in Python, JavaScript, or any other supported language, ensuring proper code annotation.
How do I find all comments in a PyCharm project?
Use the Find in Path feature (Ctrl + Shift + F
on Windows/Linux, Cmd + Shift + F
on macOS). Search for the comment symbol #
to locate all instances of comments within your project, aiding in comprehensive code reviewing and editing.
Conclusion
Mastering how to comment in PyCharm is essential for maintaining an organized and readable codebase in Python projects.
- Use the keyboard shortcuts
Ctrl + /
on Windows/Linux orCmd + /
on macOS for single-line comments. - For multiline comments, simply highlight the desired lines and press
Ctrl + Shift + /
orCmd + Option + /
. These shortcuts streamline your coding process and code maintenance tasks. - Customizing your comment style, adopting plugins like “Comments Highlighter,” and understanding the use of docstrings further enhance your code documentation efforts. This comprehensive approach improves overall code quality and readability.
By leveraging PyCharm’s efficient commenting features, you ensure that your code annotation aligns with best programming practices. Whether you’re pinpointing bugs during code inspection, or enabling seamless code reviewing, these tools are integral.
In summary, apply the described techniques to maximize your productivity and maintain excellence in your Python programming with PyCharm. Your enhanced ability to comment effectively in PyCharm begins now.
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