How to Get Historical Stock Data for Free with Python (and Actually Use It)

Most people searching for free stock data end up in the same loop. They find Yahoo Finance. The yfinance library seems perfect — until it breaks in production, returns inconsistent data, or silently changes its response format because it's scraping an unofficial endpoint. Then they try pandas-datareader. Then Alpha Vantage with a key that throttles after 5 requests per minute. Then a random GitHub repo with 200 stars and no commits since 2022. If you're: building a backtesting engine, training a