John Connor SandersStreaming Systems · Data Platforms · Agentic AI

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YahooFinancials (Python)

Open-source Python library for retrieving market data from Yahoo Finance, used by developers for quick research and automation.

  • python
  • open-source
  • finance
PyPI
Market quote retrieval flow for the YahooFinancials Python package.

Highlights

  • Built an easy-to-use API for quote, fundamentals, and historical pricing retrieval.
  • Maintained package quality through release automation and dependency updates.
  • Supported community adoption with examples and contributor-friendly documentation.

Screenshots

Python workflow retrieving Yahoo Finance market data.
Package usage flow from API call to structured output.

What it is

An open-source Python library that retrieves market and reference data from Yahoo Finance, built to be easy to drop into scripts and small automation workflows.

What I contributed

  • Created and open-sourced the initial library and API surface.
  • Focused on an ergonomic developer experience: sensible defaults, simple configuration, and quick iteration.

Outcome / impact

  • Provided a lightweight option for developers who need accessible financial data for prototyping, analysis, and automation.
  • Demonstrates a practical “package-to-prod” workflow: shipping, maintaining, and supporting a real-world Python library.

Tech (high-level)

Python · Packaging · HTTP data retrieval · Data normalization