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Format Python code with proper indentation (4 spaces), spacing around operators, and consistent style following PEP 8 guidelines.
What is Python Formatter?
Python formatting follows PEP 8 style guide: 4-space indentation, consistent spacing around operators, and clear block structure. Unlike languages with braces, Python uses indentation for code blocks, making proper formatting critical for correctness. This tool normalizes spacing, fixes indentation to 4 spaces, and organizes code structure for readability and PEP 8 compliance.
How to Use
- Paste Python code (messy or with inconsistent indentation)
- Click 'Format Python' to apply PEP 8 style
- Review 4-space indentation and operator spacing
- Copy formatted output for your project
Why Use This Tool?
Tips & Best Practices
- Python requires correct indentation - errors break code
- PEP 8 mandates 4-space indentation (not tabs)
- Check for mismatched indentation after format
- Use Black for production Python formatting
- Spacing around =, +, -, etc. improves readability
- Blank lines separate logical sections
Frequently Asked Questions
Why 4 spaces for Python?
PEP 8 Python style guide mandates 4 spaces per indentation level. Tabs are discouraged because they display differently across editors. Consistent 4-space indentation is Python convention and ensures code works correctly across all environments.
Can wrong indentation break Python?
Yes! Python uses indentation for code blocks. Wrong indentation causes IndentationError or changes program logic. Always verify indentation matches intended block structure after formatting, especially for nested if/for/while blocks.
What spacing changes are made?
Adds spaces around operators (=, +, -, *, /, ==, !=, <, >). Removes extra spaces inside parentheses and brackets. Normalizes comma spacing (a, b not a,b). Ensures blank lines between functions and logical sections.
What about docstrings and comments?
Comments and docstrings are preserved and indented correctly. Triple-quoted docstrings maintain their format. The formatter focuses on code structure, not comment content. Comments stay with their associated code blocks.
Should I use Black instead?
Black is the definitive Python formatter for production. It's more thorough and handles complex syntax perfectly. This tool is for quick formatting without setup. Use Black (pip install black) for automated project formatting.
How do I format entire Python projects?
Use Black CLI: black src/ formats all Python files in src directory. Or use autopep8 for PEP 8 compliance. This tool works best for individual snippets, debugging formatting issues, and quick cleanup without tool installation.