aioduck 2025.9.15

Python asyncio bindings for DuckDB

Python asyncio bindings for DuckDB

aioduck provides a friendly, async interface to DuckDB databases.

Usage

It replicates the standard duckdb module, but with async versions of all the standard connection and cursor methods, plus context managers for automatically closing connections and cursors:

from aioduck import AsyncConnection

async with AsyncConnection(...) as conn:
    await conn.execute("INSERT INTO some_table ...")
    await conn.commit()

    async with conn.cursor() as cursor:
        await cursor.execute("SELECT * FROM some_table")
        async for row in cursor:
            ...

It can also be used in the traditional, procedural manner:

from aioduck import AsyncConnection

db = await AsyncConnection(...)
cursor = db.cursor()
await db.execute('SELECT * FROM some_table')
row = await cursor.fetchone()
rows = await cursor.fetchall()
await cursor.close()
await db.close()

Install

aioduck is compatible with Python 3.11 and newer. You can install it from PyPI:

$ pip install aioduck

Details

aioduck allows interaction with DuckDB databases on the main AsyncIO event loop without blocking execution of other coroutines while waiting for queries or data fetches. It does this by using an agent. This agent executes all actions within a shared request queue to prevent overlapping actions.

Connection objects are proxies to the real connections through the agent. Cursors are similarly proxies to the real cursors, and provide async iterators to query results.

License

aioduck is licensed under the MIT license. I am providing code in this repository to you under an open source license. This is my personal repository; the license you receive to my code is from me and not from my employer. See the LICENSE file for details.