runtimed 2.0.3a202603200646

Python toolkit for Jupyter runtimes, powered by runtimed Rust binaries

runtimed

Python toolkit for Jupyter runtimes, powered by runtimed Rust binaries. Execute code, manage kernels, and interact with notebooks programmatically.

Installation

pip install runtimed

Note: The 2.0 release is currently in pre-release. Use pip install --pre runtimed (or uv pip install --prerelease allow runtimed) to get the latest 2.x build matching the nteract desktop nightly.

Quick Start

Synchronous API

import runtimed

with runtimed.Session() as session:
    session.start_kernel()
    result = session.run("print('hello')")
    print(result.stdout)  # "hello\n"

Async API

import asyncio
import runtimed

async def main():
    async with runtimed.AsyncSession() as session:
        await session.start_kernel()
        result = await session.run("print('hello async')")
        print(result.stdout)

asyncio.run(main())

Features

• Code execution via daemon-managed kernels
• Sync and async APIs for flexibility
• Document-first model with automerge sync
• Multi-client support for shared notebooks
• Rich output capture (stdout, stderr, display_data, errors)

Session API

session = runtimed.Session(notebook_id="my-notebook")
session.start_kernel()

# Simple execution
result = session.run("x = 42")

# Document-first pattern (for fine-grained control)
cell_id = session.create_cell("print(x)")
result = session.execute_cell(cell_id)

# Inspect results
print(result.success)
print(result.stdout)
print(result.error)

# Save the notebook to disk
path = session.save()                       # Save to current path
path = session.save(path="/tmp/copy.ipynb")  # Save-as

# Reorder cells
new_position = session.move_cell(cell_id, after_cell_id="other-id")

AsyncSession API

async with runtimed.AsyncSession(notebook_id="my-notebook") as session:
    await session.start_kernel()
    result = await session.run("x = 42")

    # Or document-first pattern
    cell_id = await session.create_cell("print(x)")
    result = await session.execute_cell(cell_id)

    # Save the notebook to disk
    path = await session.save()                       # Save to current path
    path = await session.save(path="/tmp/copy.ipynb")  # Save-as

    # Reorder cells
    new_position = await session.move_cell(cell_id, after_cell_id="other-id")

DaemonClient API

client = runtimed.DaemonClient()
client.ping()        # Health check
client.status()      # Pool statistics
client.list_rooms()  # Active notebooks

Requirements

• runtimed daemon running (see CLAUDE.md — use cargo xtask dev-daemon for development or cargo xtask install-daemon for the system service)
• Python 3.10+

Documentation

See docs/python-bindings.md for full documentation.