Modeleon – Python DSL that compiles to live Excel formulas

What it does

Financial Model Engineering — Python code compiles to live Excel formulas - modeleonai/modeleon

Variable — a value. MultiVariable — a concept, modeled as a set of Variables and sub-concepts. Excel — one cell-traceable snapshot of a MultiVariable. import modeleon as mo forecast = mo . MultiVariable ( "Forecast" ) forecast . pnl = mo . MultiVariable ( "P&L" ) with forecast . pnl as pnl : pnl . revenue = mo . Variable ( 1_000_000 , unit = "$" ) pnl . cogs_pct = mo . Variable ( 0.6 , display_name = "COGS %" ) pnl . cogs = pnl . revenue * pnl . cogs_pct pnl . profit = pnl . revenue - pnl . cogs forecast . to_excel ( "forecast.xlsx" ) The resulting forecast.xlsx : B3 is =B1*B2 — a real Excel formula, not the baked value 600000 . The lower stack writes spreadsheets. Modeleon writes the model…from github.com

In the maker’s words, at launch

Hi HN. Modeleon is an open-source Python DSL for financial models. You write models in Python with named variables and operator-overloaded arithmetic, and it compiles to a real .xlsx with live formulas — not values, but formulas like =B4*B5 that the CFO can audit in Excel. The architectural bet is "model is the…

• AV
  A virtual machine made with Google Sheets formulas (no script)2017 · ▲620

  In a popular post today[1] the title claims "VM in Google Sheets", but it's actually in Google Script, which is basically Javascript and not an interesting technical accomplishment (definitely a useful educational tool, though). Disappointed, I set out to fix it. Voila! https://docs.google.com/spreadsheets/d/1g3-FZBnkDuLqFYOmk457... A Brainfk interpreter in pure Google Sheets formulas. The hard part was parentheses matching, so I think other VMs would be even easier. [1] https://news.ycombinator.com/item?id=14701460

• SE
  Script Excel with Python2012 · ironspread.com · ▲280
• 
  RizzCalc2025 · rizzcalc.com · ▲313

  The 1st AI Financial Modeling Agent in Google Sheets

• 
  Excel to Python Compiler2024 · pyoneer.ai · ▲79

  We (me and @aarondia) built a tool to help you turn psuedo-software Excel files into real-software Python. Ideally, Pyoneer helps you automate your manual Excel processes. You can try it today here: https://pyoneer.ai. How it works: 1. You upload an Excel file 2. We statically parse the Excel file and build a dependency graph of all the cells, tables, formulas, and pivots. 3. We do a graph traversal, and translate nodes as we hit them. We use OpenAI APIs to translate formulas. There’s a bunch of extra work here — because even with the best prompt engineering a fella like me can do,…

• AW
  Alphasheets – Write Python, R, and SQL in your spreadsheets2016 · alphasheets.com · ▲72
• 
  A simple lazy Python calculation engine, with spreadsheet demo2021 · github.com · ▲123

  Simple Python Calculation Engine. Contribute to bsdz/calcengine development by creating an account on GitHub.

• 
  /dev/null▲487

  a social network for devs

  Dev tools · 3d ago · dev-null.sh

• 
  Whiteboard (YC W26) – an open-source IDE for thoughtful software design▲423

  open-source IDE for thoughtful software design. Contribute to devdotfast/whiteboard development by creating an account on GitHub.

  Dev tools · 28d ago · github.com

• 
  Reladraw – A diagram language where you decide where to place things▲411

  Contribute to reladraw/reladraw development by creating an account on GitHub.

  Dev tools · 26d ago · github.com

• 
  OpenBot▲362

  Grok Bot alternative: free, local, open-source, multiplayer

  Dev tools · 23d ago · openbot.run

• 
  Talanoa▲346

  Hi HN, I’m a fullstack developer, and honestly, I’ve lost count of how many side projects I’ve worked on over the years. But one idea kept coming back to me: a different kind of email client. It first came to me in 2014: “What if we could handle emails more like conversations?” Every year, I’d revisit this concept in my “Build Notes.” Ten years later, no one had built exactly what I had in mind — so I finally decided to do it myself. That’s how Talanoa was born. I wanted something focused on people, not timelines. I was tired of marking messages as unread just to remember to reply later, or…

  Dev tools · 21d ago · talanoa.email

• 
  CoreSpeed▲332

  One MCP for everything your agents need: apps, memory, tools

  Dev tools · 28d ago · corespeed.io

• 
  Brew ▲900

  Like Claude design for email marketing

  AI · May 2026 · brew.new

• 
  Kilo Code for VS Code▲896

  Parallel agents, diff reviewer, and multi-model comparisons

  Dev tools · May 2026 · kilo.ai

• 
  StoreClaw▲806

  Grow your store profits with agents that know how to sell

  AI · May 2026 · storeclaw.ai

• 
  PollyReach▲795

  Give your agent a real number and voice to make calls.

  AI · May 2026 · pollyreach.ai

• 
  Needle: We Distilled Gemini Tool Calling into a 26M Model▲776

  Hey HN, Henry here from Cactus. We open-sourced Needle, a 26M parameter function-calling (tool use) model. It runs at 6000 tok/s prefill and 1200 tok/s decode on consumer devices. We were always frustrated by the little effort made towards building agentic models that run on budget phones, so we conducted investigations that led to an observation: agentic experiences are built upon tool calling, and massive models are overkill for it. Tool calling is fundamentally retrieval-and-assembly (match query to tool name, extract argument values, emit JSON), not reasoning. Cross-attention…

  Life & fun · May 2026 · github.com

• 
  Files.md – Open-source alternative to Obsidian▲730

  🌱 Private, quiet space for thinking. Simple app for .md files. - zakirullin/files.md

  Dev tools · May 2026 · github.com