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Pyrefly is a type checker and language server for Python, which provides lightning-fast type checking along with IDE features such as code navigation, semantic highlighting, and code completion. It is available as a command-line tool and a VSCode extension.
no pycharm? no, thank you
PyCharm users can enable native Pyrefly support in the settings:
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Go to Python | Tools | Pyrefly in the Settings dialog.
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Select the Enable checkbox.
so it’s:
- https://plugins.jetbrains.com/plugin/26829-pyrefly-unofficial-
uv tool install pyrefly- feed it
USERPROFILE%\.local\bin\pyrefly.exe
and that’s it.
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I see there are a few performance comparisons, but I wonder how this compares to ty. I guess it may be a while before we can really compare the two since they’re both in alpha/beta.






