PyLegend

Python client library for Legend ecosystem with interactive TDS query building and execution

Release: 0.1.0 | Date: Feb 13, 2026 | License: Apache 2.0

Overview

PyLegend is a Python client library that provides seamless integration with the FINOS Legend ecosystem, enabling interactive TabularDataSet (TDS) query building and push-down execution capabilities.

Whether you’re a data analyst, data scientist, or software engineer, PyLegend bridges the gap between Legend’s powerful data modeling capabilities and Python’s rich data analysis ecosystem.

Key Features

🔗 Seamless Integration

Connect directly to Legend services and functions from Python without complex setup.

🔍 Interactive Query Building

Build TDS queries interactively with a fluent, pandas-like API.

⚡ Push-down Optimization

Execute queries with full push-down optimization for maximum performance.

🐼 Pandas Compatible

Load results directly into Pandas DataFrames for analysis and visualization.

🔄 Data Transformations

Perform powerful transformations: filter, join, group, extend, sort, and more.

📊 Type Safety

Leverage Legend’s type system for safer, more reliable data operations.

Installation

Install PyLegend using pip: pip install pylegend

Or using Poetry: poetry add pylegend

Documentation

📚 API Reference

Detailed documentation of all PyLegend classes and methods.

Getting Help

  • GitHub Issues: Report bugs or request features on our GitHub repository

  • Documentation: Browse the API Reference for detailed usage information