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Add Python - Data Sources

https://github.com/defeat-beta/defeatbeta-api

An open-source alternative to Yahoo Finance's market data APIs with higher reliability.

Key features:
✅ Reliable Data:Sources market data directly from Hugging Face's yahoo-finance-data dataset, bypassing Yahoo scraping.

✅ No Rate Limits:Hugging Face's infrastructure provides guaranteed access without API throttling or quotas.

✅ High Performance:DuckDB's OLAP engine + cache_httpfs extension delivers sub-second query latency.

✅ SQL-Compatible:Python-native interface with full SQL support via DuckDB's optimized execution.

@bwzheng2010 bwzheng2010 changed the title fix #212 Update README.md(fix #212) May 12, 2025
@bwzheng2010 bwzheng2010 changed the title Update README.md(fix #212) Update README.md May 12, 2025
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