linter

A linter is a static code analysis tool that examines source code to flag potential errors, bugs, stylistic issues, and suspicious constructs. The term originated from a 1978 program called “lint” that analyzed C code, comparing the behavior to removing lint from clothing.

In Python development, linters help maintain code quality by checking for:

  • Syntax errors and potential runtime errors
  • Violations of coding style guidelines (like PEP 8)
  • Common programming mistakes
  • Code “smells” and anti-patterns

Linting occurs without executing the code, making it a crucial part of the development workflow for catching issues before runtime. While linters can enforce style rules, their primary value lies in identifying potential bugs and maintainability issues early in development.

Python Code Quality Illustration

Tutorial

Python Code Quality: Tools & Best Practices

In this article, you'll see how to improve the quality of your Python code. We'll analyze and compare tools you can use to take your code to the next level and make it more Pythonic. Whether you've been using Python for a while, or just beginning, you can benefit from the practices and tools talked about here.

best-practices tools

For additional information on related topics, take a look at the following resources:

By Dan Bader • Updated Jan. 8, 2025
Python Glossary Share Feedback