can not place an order when change from sxpbtc to linkbtc pair.

[gzf445]

the system working on sxpbtc pair,and i want to change it to linkbtc this error happen.

2020-11-16 20:51:40,406 - ERROR - Error in master.process_event()
Traceback (most recent call last):
File "/root/copyusdt/SlaveContainer.py", line 53, in on_event_handler
p_event = self.master.process_event(event)
File "/root/copyusdt/ExchangeInterfaces/BinanceExchange.py", line 138, in process_event
self.get_part(order_event['s'], order_event['q'], order_event['p'], order_event['S']),
File "/root/copyusdt/ExchangeInterfaces/BinanceExchange.py", line 202, in get_part
balance = float(get_context_balance(symbol)['free'])
File "/root/copyusdt/ExchangeInterfaces/BinanceExchange.py", line 186, in _get_balance_market_by_symbol
return list(filter(lambda el: el['asset'] == symbol[3:], self.get_balance()))[0]
IndexError: list index out of range
Unhandled Error
Traceback (most recent call last):
File "/usr/local/lib/python3.7/dist-packages/twisted/python/log.py", line 103, in callWithLogger
return callWithContext({"system": lp}, func, *args, **kw)
File "/usr/local/lib/python3.7/dist-packages/twisted/python/log.py", line 86, in callWithContext
return context.call({ILogContext: newCtx}, func, *args, **kw)
File "/usr/local/lib/python3.7/dist-packages/twisted/python/context.py", line 122, in callWithContext
return self.currentContext().callWithContext(ctx, func, *args, **kw)
File "/usr/local/lib/python3.7/dist-packages/twisted/python/context.py", line 85, in callWithContext
return func(*args,**kw)
--- ---
File "/usr/local/lib/python3.7/dist-packages/twisted/internet/posixbase.py", line 614, in _doReadOrWrite
why = selectable.doRead()
File "/usr/local/lib/python3.7/dist-packages/twisted/internet/tcp.py", line 243, in doRead
return self._dataReceived(data)
File "/usr/local/lib/python3.7/dist-packages/twisted/internet/tcp.py", line 249, in _dataReceived
rval = self.protocol.dataReceived(data)
File "/usr/local/lib/python3.7/dist-packages/twisted/protocols/tls.py", line 330, in dataReceived
self._flushReceiveBIO()
File "/usr/local/lib/python3.7/dist-packages/twisted/protocols/tls.py", line 295, in _flushReceiveBIO
ProtocolWrapper.dataReceived(self, bytes)
File "/usr/local/lib/python3.7/dist-packages/twisted/protocols/policies.py", line 120, in dataReceived
self.wrappedProtocol.dataReceived(data)
File "/usr/local/lib/python3.7/dist-packages/autobahn/twisted/websocket.py", line 290, in dataReceived
self._dataReceived(data)
File "/usr/local/lib/python3.7/dist-packages/autobahn/websocket/protocol.py", line 1206, in _dataReceived
self.consumeData()
File "/usr/local/lib/python3.7/dist-packages/autobahn/websocket/protocol.py", line 1218, in consumeData
while self.processData() and self.state != WebSocketProtocol.STATE_CLOSED:
File "/usr/local/lib/python3.7/dist-packages/autobahn/websocket/protocol.py", line 1578, in processData
fr = self.onFrameEnd()
File "/usr/local/lib/python3.7/dist-packages/autobahn/websocket/protocol.py", line 1703, in onFrameEnd
self._onMessageEnd()
File "/usr/local/lib/python3.7/dist-packages/autobahn/twisted/websocket.py", line 318, in _onMessageEnd
self.onMessageEnd()
File "/usr/local/lib/python3.7/dist-packages/autobahn/websocket/protocol.py", line 627, in onMessageEnd
self._onMessage(payload, self.message_is_binary)
File "/usr/local/lib/python3.7/dist-packages/autobahn/twisted/websocket.py", line 321, in _onMessage
self.onMessage(payload, isBinary)
File "/usr/local/lib/python3.7/dist-packages/binance/websockets.py", line 32, in onMessage
self.factory.callback(payload_obj)
File "/root/copyusdt/SlaveContainer.py", line 57, in on_event_handler
if p_event is None:
builtins.UnboundLocalError: local variable 'p_event' referenced before assignment

Unhandled Error
Traceback (most recent call last):
File "/usr/local/lib/python3.7/dist-packages/binance/websockets.py", line 586, in run
reactor.run(installSignalHandlers=False)
File "/usr/local/lib/python3.7/dist-packages/twisted/internet/base.py", line 1283, in run
self.mainLoop()
File "/usr/local/lib/python3.7/dist-packages/twisted/internet/base.py", line 1295, in mainLoop
self.doIteration(t)
File "/usr/local/lib/python3.7/dist-packages/twisted/internet/epollreactor.py", line 235, in doPoll
log.callWithLogger(selectable, _drdw, selectable, fd, event)
--- ---
File "/usr/local/lib/python3.7/dist-packages/twisted/python/log.py", line 103, in callWithLogger
return callWithContext({"system": lp}, func, *args, **kw)
File "/usr/local/lib/python3.7/dist-packages/twisted/python/log.py", line 86, in callWithContext
return context.call({ILogContext: newCtx}, func, *args, **kw)
File "/usr/local/lib/python3.7/dist-packages/twisted/python/context.py", line 122, in callWithContext
return self.currentContext().callWithContext(ctx, func, *args, **kw)
File "/usr/local/lib/python3.7/dist-packages/twisted/python/context.py", line 85, in callWithContext
return func(*args,**kw)
File "/usr/local/lib/python3.7/dist-packages/twisted/internet/posixbase.py", line 627, in _doReadOrWrite
self._disconnectSelectable(selectable, why, inRead)
File "/usr/local/lib/python3.7/dist-packages/twisted/internet/posixbase.py", line 258, in _disconnectSelectable
selectable.connectionLost(failure.Failure(why))
File "/usr/local/lib/python3.7/dist-packages/twisted/internet/tcp.py", line 519, in connectionLost
self._commonConnection.connectionLost(self, reason)
File "/usr/local/lib/python3.7/dist-packages/twisted/internet/tcp.py", line 327, in connectionLost
protocol.connectionLost(reason)
File "/usr/local/lib/python3.7/dist-packages/twisted/protocols/tls.py", line 398, in connectionLost
self._flushReceiveBIO()
File "/usr/local/lib/python3.7/dist-packages/twisted/protocols/tls.py", line 295, in _flushReceiveBIO
ProtocolWrapper.dataReceived(self, bytes)
File "/usr/local/lib/python3.7/dist-packages/twisted/protocols/policies.py", line 120, in dataReceived
self.wrappedProtocol.dataReceived(data)
File "/usr/local/lib/python3.7/dist-packages/autobahn/twisted/websocket.py", line 290, in dataReceived
self._dataReceived(data)
File "/usr/local/lib/python3.7/dist-packages/autobahn/websocket/protocol.py", line 1206, in _dataReceived
self.consumeData()
File "/usr/local/lib/python3.7/dist-packages/autobahn/websocket/protocol.py", line 1218, in consumeData
while self.processData() and self.state != WebSocketProtocol.STATE_CLOSED:
File "/usr/local/lib/python3.7/dist-packages/autobahn/websocket/protocol.py", line 1570, in processData
fr = self.onFrameData(payload)
File "/usr/local/lib/python3.7/dist-packages/autobahn/websocket/protocol.py", line 1665, in onFrameData
self._onMessageFrameData(payload)
File "/usr/local/lib/python3.7/dist-packages/autobahn/twisted/websocket.py", line 309, in _onMessageFrameData
self.onMessageFrameData(payload)
File "/usr/local/lib/python3.7/dist-packages/autobahn/websocket/protocol.py", line 601, in onMessageFrameData
self.frame_data.append(payload)
builtins.AttributeError: 'NoneType' object has no attribute 'append'