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asyncpg：高效的基于 Python/asyncio 的 PostgreSQL 客户端库

asyncpg -- A fast PostgreSQL Database Client Library for Python/asyncio

asyncpgis a database interface library designed specifically for PostgreSQL and Python/asyncio. asyncpg is an efficient, clean implementation of PostgreSQL server binary protocol for use with Python's asyncio framework. You can read more about asyncpg in an introductory blog post here .

Documentation

The project documentation can be found here .

Performance

In our testing asyncpg is, on average, 3x faster than psycopg2 (and its asyncio variant -- aiopg).

asyncpg：高效的基于 Python/asyncio 的 PostgreSQL 客户端库

The above results are a geometric mean of benchmarks obtained with PostgreSQL client driver benchmarking toolbench .

Features

asyncpg implements PostgreSQL server protocol natively and exposes its features directly, as opposed to hiding them behind a generic facade like DB-API.

This enables asyncpg to have easy-to-use support for:

prepared statements
scrollable cursors
partial iteration on query results
automatic encoding and decoding of composite types, arrays, and any combination of those
straightforward support for custom data types

Installation

asyncpg requires Python 3.5 and is available on PyPI. Use pip to install it:

$ pip install asyncpg

Basic Usage

import asyncio
import asyncpg

async def run():
    conn = await asyncpg.connect(user='user', password='password',
                                 database='database', host='127.0.0.1')
    values = await conn.fetch('''SELECT * FROM mytable''')
    await conn.close()

loop = asyncio.get_event_loop()
loop.run_until_complete(run())