Broken Links Found in Documentation

# Link Check Report 🚨 **3 broken link(s)** and **0 redirect(s)** were found in the documentation. **Details:** - **Repository:** QuantEcon/lecture-python-programming - **Workflow:** Link Checker [Anaconda, Linux] - **Run ID:** [23464561647](https://github.com/QuantEcon/lecture-python-programming/actions/runs/23464561647) - **Commit:** f0661c5ba9339de0e8e56d2f5f1696232fedc997 - **Branch:** main - **Date:** 2026-03-23T23:15:17.884Z --- ## Link Check Summary - **Total broken links**: 3 - **Total redirects found**: 0 ## Broken Links **./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 **./python_advanced_features.html** - 1 broken link(s): ❌ https://raw.githubusercontent.com/QuantEcon/lecture-python-programming/master/source/_static/lecture_specific/python_advanced_features/test_table.csv - Status: 404 Link text: this csv file --- **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](https://github.com/QuantEcon/meta/.github/actions/link-checker). Please close this issue once all broken links have been addressed.