Summarize this article with:
Messy code without explanations slows everyone down. Learning how to comment in PyCharm takes about two minutes and saves hours of confusion later.
Comments turn cryptic scripts into readable documentation. They help teammates understand your logic, remind future-you what that function actually does, and make debugging far less painful.
PyCharm offers multiple ways to add code annotations: keyboard shortcuts, menu options, and auto-generated docstrings.
This guide covers single-line comments, block comments, multi-line selection, and docstring creation. You will also learn how to configure comment formatting in Editor settings and fix common issues when shortcuts stop working.
How to Comment in PyCharm
Commenting in PyCharm is the process of adding non-executable text annotations to Python code using the hash symbol (#) or triple quotes for documentation strings.
Developers need this when explaining complex logic, temporarily disabling code during debugging, or creating technical documentation for team members.
This guide covers 6 methods requiring about 2 minutes to learn. Basic familiarity with PyCharm and Python syntax is enough to get started.
Prerequisites
- PyCharm version: Community Edition 2023.x or Professional Edition (any recent version works)
- Operating system: Windows, macOS, or Linux
- Skill level: Beginner
- Time needed: 2-3 minutes
- Required: A Python project open with at least one .py file
If you need help with initial configuration, check how to setup PyCharm first.
Step 1: How Do You Add Single-Line Comments in PyCharm?
Place your cursor on any line and press Ctrl+/ (Windows/Linux) or Cmd+/ (macOS). PyCharm inserts a hash symbol at the beginning of the line, converting it to a comment that the Python interpreter ignores.
Action
- Position cursor: Click anywhere on the target line
- Press shortcut: Ctrl+/ or Cmd+/
- Result: Line starts with # and turns gray/green depending on your color scheme
Purpose
Single-line comments work best for brief code explanations and inline notes.
They help with code readability when you need quick annotations without breaking the flow of your script.
Step 2: What Is the Keyboard Shortcut for Block Comments in PyCharm?
Select multiple lines of code, then press Ctrl+Shift+/ (Windows/Linux) or Cmd+Option+/ (macOS). PyCharm wraps the selection in triple quotes, creating a block comment or docstring structure.
Action
- Select code: Click and drag to highlight the target lines
- Press shortcut: Ctrl+Shift+/ or Cmd+Option+/
- Result: Selected text appears between “”” markers
Purpose
Block comments suit longer explanations spanning multiple lines.
Use them for function descriptions, module headers, or when you need to disable entire code sections during the debugging process.
Step 3: How Do You Comment Multiple Lines at Once in PyCharm?
Select all lines you want to comment, then press Ctrl+/ (Windows/Linux) or Cmd+/ (macOS). Each selected line receives its own hash symbol prefix, letting you quickly disable or annotate several lines of code simultaneously.
Action
- Select lines: Click at the start, hold Shift, click at the end (or drag)
- Apply shortcut: Ctrl+/ or Cmd+/
- Result: Every selected line now begins with #
Purpose
Bulk commenting speeds up your workflow when testing different code versions.
It is faster than adding hash symbols manually, especially in larger Python files where you might comment out dozens of lines during code refactoring.
Step 4: Where Do You Find Comment Options in PyCharm Menus?
Open the Code menu from the top menu bar and select “Comment with Line Comment” or “Comment with Block Comment.” These menu options mirror the keyboard shortcuts and work identically.
Action
- Menu path for line comments: Code > Comment with Line Comment
- Menu path for block comments: Code > Comment with Block Comment
- Result: Selected code receives comment markers
Purpose
Menu navigation helps when you forget shortcuts or prefer mouse-based workflows.
Useful for developers transitioning from other development IDEs with different keybindings.
Step 5: How Do You Uncomment Code in PyCharm?
Select commented lines and press the same shortcut: Ctrl+/ (Windows/Linux) or Cmd+/ (macOS). PyCharm removes the hash symbols, restoring the code to executable state.
Action
- Select commented lines: Highlight code starting with # symbols
- Press shortcut: Ctrl+/ or Cmd+/
- Result: Hash symbols disappear; code becomes active again
Purpose
The toggle comment behavior means one shortcut handles both commenting and uncommenting.
No need to memorize separate commands.
Step 6: How Do You Add Docstrings in PyCharm?
Position your cursor directly below a function or class definition, type three quotation marks (“””), and press Enter. PyCharm auto-generates a docstring template with parameter placeholders.
Action
- Cursor position: Line immediately after def function_name(): or class ClassName:
- Type: “”” then press Enter
- Result: Template appears with :param and :return: fields
Purpose
Docstrings create software documentation that tools like Sphinx can extract automatically.
They follow PEP 257 conventions and appear in hover tooltips throughout your project.
Step 7: How Do You Configure Comment Style Settings in PyCharm?
Go to File > Settings > Editor > Code Style > Python (Windows/Linux) or PyCharm > Preferences > Editor > Code Style > Python (macOS). Adjust spacing, alignment, and formatting rules for comments here.
Action
- Open settings: File > Settings (or PyCharm > Preferences on Mac)
- Navigate to: Editor > Code Style > Python
- Modify options: Check “Add a space at comment start” and similar toggles
Purpose
Custom settings ensure your comment style matches team coding standards.
Consistent formatting matters when multiple developers share a codebase.
Verification
After adding comments, verify they work correctly:
- Visual check: Comments appear in a distinct color (typically gray or green)
- Run the code: Execute your Python file and confirm commented lines produce no output or errors
- Hover test: For docstrings, hover over the function name elsewhere in your code; the documentation should appear in a tooltip
If comments execute as code, you likely missed the hash symbol or have a syntax error in your triple quotes.
Troubleshooting
Issue: Keyboard Shortcut Not Working
Solution: Check your keymap at File > Settings > Keymap. Search for “Comment” to see assigned shortcuts. Another plugin or system shortcut might conflict.
Issue: Wrong Comment Style Applied
Solution: Go to Editor > Code Style > Python and verify your formatting preferences. Reset to defaults if settings were accidentally changed.
Issue: Docstring Template Not Appearing
Solution: Confirm cursor placement is directly after the function definition line. Check Settings > Editor > General > Smart Keys and enable “Insert documentation comment stub.”
Issue: Comments Breaking Code Execution
Solution: Look for unclosed triple quotes or hash symbols inside strings. Use linting tools to catch syntax problems before running.
Related Processes
After mastering comments, explore these connected PyCharm skills:
- How to use PyCharm for general IDE navigation
- How to create a new project in PyCharm for workspace setup
- How to connect PyCharm to GitHub for source control integration
- Code review process fundamentals for team collaboration
FAQ on How To Comment In PyCharm
What Is the Shortcut to Comment in PyCharm?
Press Ctrl+/ on Windows and Linux or Cmd+/ on macOS. This keyboard shortcut adds a hash symbol (#) at the beginning of the current line, converting it to a single-line comment instantly.
How Do I Comment Multiple Lines in PyCharm?
Select all target lines by clicking and dragging, then press Ctrl+/ or Cmd+/. PyCharm adds a hash symbol to each selected line simultaneously. This bulk commenting method works faster than editing lines individually.
How Do I Uncomment Code in PyCharm?
Use the same toggle comment shortcut: Ctrl+/ or Cmd+/. Select commented lines and press the shortcut. PyCharm removes the hash symbols automatically, restoring code to its executable state.
What Is the Difference Between Line Comments and Block Comments?
Line comments use a single hash symbol (#) for one line. Block comments use triple quotes (“””) to wrap multiple lines. Line comments suit quick notes; block comments work better for longer explanations or docstrings.
How Do I Add a Docstring in PyCharm?
Place your cursor below a function or class definition. Type three quotation marks (“””) and press Enter. PyCharm generates a documentation string template with parameter fields following PEP 257 conventions.
Why Is My Comment Shortcut Not Working in PyCharm?
Check your keymap settings at File > Settings > Keymap. Search for “Comment” to verify assignments. A conflicting plugin or system shortcut might override the default. You can also update PyCharm to fix bugs.
Can I Customize Comment Shortcuts in PyCharm?
Yes. Navigate to File > Settings > Keymap and search for “Comment with Line Comment.” Right-click the action and select “Add Keyboard Shortcut” to assign your preferred key combination for the IDE.
How Do I Comment Out Code Using the Menu?
Click Code in the top menu bar. Select “Comment with Line Comment” or “Comment with Block Comment” from the dropdown. This menu-based approach mirrors keyboard shortcuts for developers who prefer mouse navigation.
What Is the Shortcut for Block Comments in PyCharm?
Press Ctrl+Shift+/ on Windows and Linux or Cmd+Option+/ on macOS. This wraps selected code in triple quotes, creating a block comment structure useful for multi-line annotations or temporarily disabling code sections.
How Do I Add a Space After the Hash Symbol Automatically?
Go to File > Settings > Editor > Code Style > Python. Enable “Add a space at comment start” under the Other tab. PyCharm then inserts a space after every hash symbol for cleaner code formatting.
Conclusion
Knowing how to comment in PyCharm improves your daily coding workflow. The JetBrains IDE makes code annotation fast with simple keyboard shortcuts and menu options.
You now have the tools to add single-line comments, block comments, and Python docstrings. Toggle commenting on and off with one keystroke. Customize your comment style in the Settings dialog.
Good code documentation habits pay off during code maintenance and team collaboration. Comments clarify Python syntax for anyone reading your .py files later.
Start using these techniques in your next project. Quick comments take seconds but save hours of confusion. Your future self (and your teammates) will thank you.
Keep practicing until the shortcuts become muscle memory.
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