如何pandas.read在异步连接上使用www.example.com _sql？

xxhby3vn 于 2023-04-28 发布在其他

关注(0)|答案(1)|浏览(124)

我正在尝试异步运行

engine = create_engine('sqlite:///./test.db')
stmt = session.query(MyTable)
data = pd.read_sql(stmt, engine)

但它失败，错误为AttributeError: 'AsyncConnection' object has no attribute 'cursor'。
什么才是让这件事成功的正确方法？

asyn_engine = create_async_engine('sqlite+aiosqlite:///./test.db')
stmt = select(MyTable)
data = pd.read_sql(stmt, async_engine)

pandas

来源：https://stackoverflow.com/questions/70848256/how-can-i-use-pandas-read-sql-on-an-async-connection

1条答案

按热度按时间

to94eoyn1#

原则上，这个代码是有效的……

# Making pd.read_sql_query connection the first argument to make it compatible 
# with conn.run_syn()
def read_sql_query(con, stmt):
    return pd.read_sql(stmt, con)

async def get_df(stmt, engine):
    async with engine.begin() as conn:
        data = await conn.run_sync(_read_sql, stmt)
    return data

asyn_engine = create_async_engine('sqlite+aiosqlite:///./test.db')
stmt = select(MyTable)

data = get_df(stmt, asyn_engine )

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如何pandas.read在异步连接上使用www.example.com _sql？

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