Function isInstalled

packages/python/src/version.ts:384–397

(pv: PythonVersion)

}

function isInstalled(pv: PythonVersion): boolean {
  try {
    const installed = getInstalledPythons();
    const version = pythonVersionString(pv);
    if (!version) return false;
    return installed.has(version);
  } catch (err) {
    throw new NowBuildError({
      code: 'UV_ERROR',
      link: 'https://vercel.link/python-version',
      message: err instanceof Error ? err.message : String(err),
    });
  }
}