Question

此代码在Windows中运行良好，但是当我将其移至vps（ubuntu16.04，python3.6）时，出现了一些问题。

import json
import time
import threading
import websocket
import requests
from datetime import datetime, timedelta, timezone

def run_in_thread(sec):
    def _wrapper(func):
        def __wrapper(self, *args, **kwargs):
            timer = threading.Timer(sec, func, [self, *args])
            timer.start()
            self._ws.on_open = self.on_open
            self._ws.run_forever()
            return self._result
        return __wrapper
    return _wrapper

class CybexHistoryAPI(object):
    def __init__(self, ws_endp):
        self._endpoint = ws_endp
        self.reset()

    def reset(self):
        self._ws = websocket.WebSocketApp(self._endpoint,
            on_message = self.on_message,
            on_error = self.on_error,
            on_close = self.on_close)
        self._login_api_id = -1
        self._history_api_id = -1
        self._api_is_ready = False
        self._call_id = 1

    def _send_msg(self, params):
        call = {"id": self._call_id, "method": "call",
                "params": params}
        self._ws.send(json.dumps(call))
        self._call_id += 1

    def on_open(self, ws):
        self._send_msg([1, "login", ["",""]])
        self._call_id = 1

    def on_error(self, ws, error):
        print('Remote node send an error [{}]'.format(error))

    def on_close(self, ws):
        print('Remote node closed our connection')

    def on_message(self, ws, msg):
        print(msg)
        if self._login_api_id < 0:
            result = json.loads(msg)
            self._login_api_id = result['id']
            self._send_msg([self._login_api_id, "history", []])
        elif self._history_api_id < 0:
            result = json.loads(msg)
            self._history_api_id = result['result']
            self._api_is_ready = True
        else:
            self._result = json.loads(msg)['result']
            self._ws.close()
            self.reset()

    @run_in_thread(0.01)
    def get_account_history(self, account_id, stop, limit, start):
        while not self._api_is_ready:
            time.sleep(0.01)
        self._send_msg([self._history_api_id, "get_account_history",
            [account_id, stop, limit, start]])

    @run_in_thread(0.01)
    def get_market_history(self, base_id, quote_id, ts, start, end):
        while not self._api_is_ready:
            time.sleep(0.01)
        self._send_msg([self._history_api_id, "get_market_history",
            [base_id, quote_id, ts, start, end]])

    @run_in_thread(0.01)
    def get_fill_order_history(self, base_id, quote_id, limit):
        while not self._api_is_ready:
            time.sleep(0.01)
        self._send_msg([self._history_api_id, "get_fill_order_history",
            [base_id, quote_id, limit]])

def scan_account(acc_id, max_len = 100):
    api = CybexHistoryAPI('wss://shanghai.51nebula.com')
    start = 0
    tot_len = 0
    while tot_len < max_len:
        print('start at 1.11.{}'.format(start))
        ret = api.get_account_history(acc_id, '1.11.1', 100, '1.11.' + str(start))
        if len(ret) == 0 or int(ret[0]['id'].split('.')[-1]) == start:
            break
        tot_len += len(ret)
        print('got {}'.format(len(ret)))
        print('end at {}'.format(ret[-1]['id']))
        #print(json.dumps(ret, indent=2))
        start = int(ret[-1]['id'].split('.')[-1]) - 1

    print(tot_len)
    return

def run_test():
    scan_account('1.2.38696')

if __name__ == '__main__':
    run_test()

我收到以下错误：

Traceback (most recent call last):
File "ListenTransferRecord.py", line 197, in <module>
    run_test()
File "ListenTransferRecord.py", line 186, in run_test
    respone = scan_account(accountID,10)
File "ListenTransferRecord.py", line 147, in scan_account
    ret = api.get_account_history(acc_id, '1.11.1', 100, '1.11.' + str(start))
File "ListenTransferRecord.py", line 71, in __wrapper
    return self._result
AttributeError: 'CybexHistoryAPI' object has no attribute '_result'

我不明白为什么它可以在Windows中很好地工作，但是在ubuntu中却不能。

我尝试在VPS（ubuntu）中运行一些简单的代码来测试python环境是否正常。

我尝试重新安装此代码导入的所有模块。但它仍然无法正常工作。

Answer 1

您得到的错误恰好触发了已经存在的错误-self._result仅在特定条件下设置（在{{ 1}}方法），但是您可以在装饰器中无条件地访问它。由于某些原因（我们无法提供更多详细信息-在没有在您的实际环境中测试代码的情况下，实际上没有机会告诉您），到目前为止，您从未（在）在Windows上运行代码时偶然发现这种情况，但是错误本身并不依赖于环境本身。解决方法非常简单：只需确保始终设置else属性（最终设置为on_message之类的前哨值：

_result

为什么您在不同的环境上有不同的行为，这可能是由于很多原因导致无法确定将它们全部列出...这可能是由于网络延迟以及线程之间的同步问题（特定于操作系统）引起的实施细节，月相等等，就像我说的那样，多数情况下，如果不直接访问两个环境都无法解决问题。

为什么我的代码在Windows中能正常工作，但在ubuntu中却不能

1 个答案: