[英]How to run 2 async functions forever?
我正在尝试永远运行 2 个async
函数。 有人能帮我吗? 下面提供了我的代码和错误消息。
代码:
import websockets
import asyncio
import json
import time
async def time(loop):
while True:
millis = await int(round(time.time() * 1000))
print(millis)
await asyncio.sleep(0.001)
async def stream(loop):
async with websockets.connect('wss://www.bitmex.com/realtime?subscribe=trade:XBTUSD')
as websocket:
while True:
try:
data = await websocket.recv()
data = json.loads(data)
print(data['data'][-1]['price'])
except KeyError:
pass
except TypeError:
pass
loop = asyncio.get_event_loop()
async def main():
await asyncio.gather(loop.run_until_complete(stream(loop)),
loop.run_until_complete(time(loop)))
if __name__ == "__main__":
asyncio.run(main())
错误:
Exception has occurred: RuntimeError
Cannot run the event loop while another loop is running
好吧,您的代码段几乎没有错误:
time
,因为它会与内置的time
function 产生冲突loop
作为参数传递? 没用的。await
它,即int
是一个同步的内置方法。进行适当的更正,它将是这样的:
import websockets
import asyncio
import json
import time
async def another_name():
while True:
millis = int(round(time.time() * 1000))
print(millis)
await asyncio.sleep(0.001)
async def stream():
async with websockets.connect('wss://www.bitmex.com/realtime?subscribe=trade:XBTUSD')
as websocket:
while True:
try:
data = await websocket.recv()
data = json.loads(data)
print(data['data'][-1]['price'])
except KeyError:
pass
except TypeError:
pass
await asyncio.sleep(0.001) #Added
if __name__ == "__main__":
loop = asyncio.get_event_loop()
coros = []
coros.append(another_name())
coros.append(stream())
loop.run_until_complete(asyncio.gather(*coros))
stream()
function 中的await asyncio.sleep(0.001)
行是强制性的,否则它永远不会让another_name()
function 运行。
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