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Martin Hope
subUser
Asked: 2022-09-02 02:08:12 +0000 UTC
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我怎样才能只定义一次异步客户端 - 一个与服务器的连接然后使用它，但我不知道如何将此客户端定义为类的全局。我只是猜测在每次使用之前创建一个新连接，但这当然是浪费时间。布德欢迎任何建议。图书馆：https ://pypi.org/project/python-binance/

工作代码：

import asyncio
from binance import AsyncClient

class Binance:
    async def get_trades(self):
        client = await AsyncClient.create() # define two times(two connections) need only one
        aggregate_trades = await client.get_all_tickers()
        print(aggregate_trades)
        await client.close_connection()

    async def exchange_info(self):
        client = await AsyncClient.create() # define two times(two connections) need only one
        exchange_info = await client.get_exchange_info()
        print(exchange_info)
        await client.close_connection()

async def main():
    b = Binance()
    await asyncio.gather(b.get_trades(), b.exchange_info())
 
if __name__ == "__main__":
    asyncio.run(main())

应该是（但不起作用）：

import asyncio
from binance import AsyncClient

class Binance:
    def __init__(self):
        asyncio.run(self.async_init())

    async def async_init(self):
        self.client = await AsyncClient.create() # define only one time because use much time

    async def get_trades(self):
        aggregate_trades = await self.client.get_all_tickers()
        print(aggregate_trades)

    async def exchange_info(self):
        exchange_info = await self.client.get_exchange_info()
        print(exchange_info)

async def main():
    b = Binance()
    await asyncio.gather(b.get_trades(), b.exchange_info())
 
if __name__ == "__main__":
    asyncio.run(main())
python async