AI Coding Assistants

isort

Automatically sorts Python imports to improve code readability and maintainability.

Status
Generally available
Last checked
Checked · Oct 11, 2026
License
Open source
Pricing
Free tier · from $0
Visit isort Compare with alternatives

What it is

isort is a utility that automatically sorts, checks, and combines import statements in Python files. It helps developers adhere to style guides like PEP8 by ensuring imports are organized consistently across their projects.

isort stands out as a lightweight, yet powerful tool for automating the process of organizing Python imports, making it an essential part of any Python developer's toolkit.

When it fits — and when it doesn’t

A good fit for

  • Developers who need to maintain consistency in their Python projects and adhere to PEP8 style guidelines.

  • Projects with multiple contributors where consistent import ordering is crucial for readability.

  • Automating the process of organizing imports as part of a continuous integration/continuous deployment (CI/CD) pipeline.

Look elsewhere if

  • Developers who prefer manual control over their code organization and do not require automated tools.

  • Projects that are already well-maintained with consistent import ordering practices in place.

Known weaknesses

Each one links to the public issue, changelog or docs page it came from, where we have one.

  1. 01

    Limited language support

    isort is primarily designed for Python and does not natively support other languages, limiting its utility in polyglot projects.

  2. 02

    Configuration complexity for nuanced use cases

    Advanced users may find the configuration options cumbersome or insufficiently granular to meet all style guide requirements without manual intervention.

  3. 03

    Performance overhead on large codebases

    Processing a large number of files can introduce noticeable delays, impacting build times in CI/CD pipelines.

What it does well

  • Automatically sorts imports in Python files.

  • Checks for import order violations without modifying the file.

  • Combines multiple import statements into a single line.

  • Supports configuration via setup.cfg, pyproject.toml, or isort.cfg.

  • Integrates with popular IDEs and text editors.

Pricing

Free tier
YesOpen source — free to use
Paid from
$0
Model
Flat rate
Enterprise plan
No

Pricing not independently confirmed — check the vendor’s page.

Performance benchmarks

How Fast Is It?

Set up isort

Setup steps, common gotchas and what to check after 30 days.

Open the setup guide →