Datons Dev #1 — python-esios Updates | Chat with I90 Files, No Coding Required

What we’ll demo

Our open-source library for working with Spanish electricity market data — no slides, no setup walkthrough, just real queries answered in seconds with ESIOS data and I90 files.

The problem

I90 files are the richest public dataset of the Spanish electricity market at the programming unit level, yet most analysts still download them manually from ESIOS
Parsing the multi-sheet Excel format (PBF, constraints, real-time) requires repetitive, error-prone code
There’s no way to ask in plain language “which programming units were curtailed in January and by how many MWh?” and get an answer backed by real data

What you’ll see

I90 download in one command: esios archives download 34 --start 2025-05-05 --end 2025-06-08
Automatic parsing: multi-sheet Excel format (PBF, market constraints, real-time)
Curtailment analysis: by technology and programming unit
Generation mix: from the Base Operating Program (PBF)
Smart caching: only downloads missing days, re-running is instant

Architecture

VSCode + Claude Code

Conversational electricity market queries

Agent skills

python-esios

github.com/datons/python-esios

•ESIOS indicators

•I90 files

•Parquet cache

•Integrated CLI

ESIOS / REE

Prices, generation, demand, settlements

Stack

Claude Code (Anthropic) in VSCode · python-esios · Parquet

Who is this for

Electricity market analysts who want to access I90 files and ESIOS data without writing boilerplate code
Developers building energy analysis tools on top of REE data
AI enthusiasts curious about how agent skills turn natural language into structured data queries

Resources

python-esios - Spanish electricity market data (ESIOS/REE)