TabPy (Tableau Python Server) is external server implementation which allows expanding Tableau with executing Python scripts in table calculation.

All documentation is in the docs folder. Consider reading it in this order:

• About TabPy
• TabPy Server Download Instructions
• TabPy Server Configuration Instructions
• TabPy Server Startup Instructions
• Supported TabPy Server Configurations
• Running TabPy in Python Virtual Environment
• Authoring Python calculations in Tableau.
• TabPy Tools

More technical topics:

• Contributing Guide for TabPy developers
• TabPy REST API
• TabPy Security Considerations

Other useful resources:

• For all questions not related to the TabPy code (installation, deployment, connections, Python issues, etc.) and requests use the External Services Forum on Tableau Community.
• Building advanced analytics applications with TabPy
• Building Data Science Applications with TabPy Video Tutorial
• TabPy Tutorial on TabWiki