Side by side
autopep8 vs Fourmolu
Both stand on code formatting tools. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan APILinuxMac+1
autopep8 offers configurable PEP 8 formatting across major desktop platforms and can be used from commands, hooks, or Python code. Review aggressive changes carefully because some can affect meaning.
Visit autopep8 Free plan LinuxWebWindows
Fourmolu offers configurable Haskell formatting, with browser, editor, and CI integration options. Its experimental CPP support and LF-only output are important constraints to consider.
Visit FourmoluThe facts
| autopep8 | Fourmolu | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | API, Linux, Mac, Windows | Linux, Web, Windows |
| Lowest paid plan | Not published | Free or on request |
| Plans published | None | 1 |
| Maker | Not published | Not published |
| Website | github.com | fourmolu.github.io |
| On code formatting tools | #8 of 34 | #12 of 34 |
autopep8: what it does well
- Free and MIT licensed
- Fixes most pycodestyle-reported issues
- Supports configurable fix codes
- Works as a pre-commit hook
- Provides a Python module API
What to know first
- Requires Python 3.9 or newer
- Requires the pycodestyle dependency
- Aggressive fixes may change code meaning
- No editor integration listed
Fourmolu: what it does well
- Offers an interactive browser demo.
- Formatting options can be configured in YAML or CLI.
- Can use Cabal defaults and dependencies for fixities.
- Supports selective formatting with comments or line regions.
- Editor integration through Haskell Language Server is documented.
What to know first
- CPP handling is experimental and limited to simple cases.
- Always outputs LF line endings.
- Check mode can fail on CRLF files.
Alternatives to autopep8 Alternatives to Fourmolu The whole list