Broken Links Found in Documentation

[github-actions]

Link Check Report

🚨 2 broken link(s) and 2 redirect(s) were found in the documentation.

Details:

• Repository: QuantEcon/lecture-python-programming
• Workflow: Link Checker [Anaconda, Linux]
• Run ID: 24055731322
• Commit: 43d36c7
• Branch: main
• Date: 2026-04-06T23:19:34.589Z

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Link Check Summary

• Total broken links: 2
• Total redirects found: 2

Broken Links

_site/pandas.html - 2 broken link(s):
❌ https://fred.stlouisfed.org/ - Status: 0 (Timeout)
Link text: FRED
❌ https://fred.stlouisfed.org/series/UNRATE - Status: 0 (Timeout)
Link text: unemployment rate

_site/python_advanced_features.html - 2 redirect(s):
🔄 https://mypy.readthedocs.io/ -> https://mypy.readthedocs.io/en/stable/ (1 redirects)
🔄 https://jax.readthedocs.io/ -> https://docs.jax.dev/en/latest/ (2 redirects)

AI-Powered Suggestions

_site/python_advanced_features.html - AI Suggestions:
🤖 https://mypy.readthedocs.io/
Issue: Redirected 1 times
💡 redirect_update: https://mypy.readthedocs.io/en/stable/
Reason: Update to final destination to avoid 1 redirect(s)
🤖 https://jax.readthedocs.io/
Issue: Redirected 2 times
💡 redirect_update: https://docs.jax.dev/en/latest/
Reason: Update to final destination to avoid 2 redirect(s)

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Next Steps:

1. Review the broken links listed above
2. Update or remove broken links from the source files
3. Consider applying AI suggestions for better alternatives
4. Re-run the link check to verify fixes

Note: This issue was automatically created by the AI-Powered Link Checker Action.

Please close this issue once all broken links have been addressed.

[mmcky]

Closing as a duplicate of #587, which carries the same two FRED findings.

Both FRED URLs are false positives: they return 200 in well under a second from a normal network, and the 0 (Timeout) status is FRED throttling GitHub Actions runner IPs. They are already whitelisted for Sphinx in lectures/_config.yml under linkcheck_ignore, but the link checker scans built HTML and never sees that configuration, so it re-reports them every week.

The two redirects this report additionally flagged are already resolved on main: lectures/python_advanced_features.md links the final destinations https://mypy.readthedocs.io/en/stable/ and https://docs.jax.dev/en/latest/ at lines 551 and 558. PR #518 proposed a workflow-side workaround for the FRED timeouts and was closed on 2026-04-14 as not the preferred approach.

The fix belongs in the action rather than in this repo. Tracked upstream in QuantEcon/action-link-checker#2, which requests an ignore-patterns input plus deduplication so a recurring finding updates one issue instead of opening a new one each week.

This report belongs to an older batch (2026-04-06 through 2026-05-25) that is missing from GitHub's issue search index, so it never appeared in the repository's open-issues list. That is why it is being closed a few months after the 2026-06 to 2026-07 batch rather than alongside it.