Python 多个事件筛选器不适用于Infura

我正在尝试聆听英弗拉的许多事件，但它不起作用。只有一个过滤器工作，当我添加第二个过滤器时，出现以下消息：

RuntimeError: cannot call recv while another coroutine is already waiting for the next message
Exception in thread Thread-15:

raise ValueError(response["error"])
ValueError: {'code': -32000, 'message': 'filter not found'}

大约2秒钟后，出现以下错误消息：

RuntimeError: cannot call recv while another coroutine is already waiting for the next message
Exception in thread Thread-15:

raise ValueError(response["error"])
ValueError: {'code': -32000, 'message': 'filter not found'}

下面是我的python代码：

import threading
import time
from web3 import Web3
import json


  PROVIDER = "wss://ropsten.infura.io/ws/v3/f5000000000000"
  web3 = Web3(Web3.WebsocketProvider(PROVIDER))


  truffleFile = json.load(open('/Users/a/ropsten/build/contracts/a.json'))
  abi = truffleFile['abi']
  bytecode = truffleFile['bytecode']

  contract = web3.eth.contract(abi= abi, address= '0x000000000000000')


  # ------------------------------------------------------------

  def handle_event2(name,event):
       print('the event is from :%s'%name)
       print(event)


  def log_loop2(name,event_filter, poll_interval):
       while True:
          for event in event_filter.get_new_entries():
              handle_event2(name,event)
          time.sleep(poll_interval)

 def PS_listen():
       print(" I am in PS Listen ")
       block_filter = contract.events.PS.createFilter(fromBlock = 'latest')

 worker1 = threading.Thread(target=log_loop2, args=('Th-1',block_filter, 2,))
 worker1.start()



print(" I am in PS Listen after start")


 def handle_event2(name,event):
       print('the event is from :%s'%name)
       print(event)
  # ---------------------------------------------

 def log_loop2(name,event_filter, poll_interval):
       while True:
            for event in event_filter.get_new_entries():
               handle_event2(name,event)
       time.sleep(poll_interval)

  def listen():
       print(" I am in Listen ")
       block_filter = contract.events.PS.createFilter(fromBlock = 'latest')

       print(block_filter)
       worker2 = threading.Thread(target=log_loop2, args=('Th-2',block_filter, 2,))
       worker2.start

       print(" I am in Listen after start")



   print(" This is the main function1")
   PS_listen()
   listen()
   print(" This is the main function2")

注意：我已经正确添加了Infura项目ID。合同地址在Ropsten infura上部署后从终端进行复制

是线程问题阻止我为下一个事件创建另一个过滤器，而错误意味着协同程序正在另一个任务中运行吗

非常感谢您的帮助