Question

首先，我对Python并不十分熟悉，所以如果这是一个过于基本的问题我会道歉。我曾尝试在Google和SO上搜索解决方案，并且没有任何结果。

我目前正致力于加密货币交易平台，该平台使用Autobahn接收WAMP市场更新。但是，我的一个类方法存在问题。有问题的代码如下：

class TradeClient(ApplicationSession):
    exchange = "NULL"   

    def eventProcessor(self, event):
        print("eventProcessor called")
        print("market event received: {}".format(event))

    def onJoin(self, details):
        print("{} client session ready".format(exchange))

        def marketEvent(event):
            print("marketEvent called")
            self.processEvent(event)

            [...]

现在，显然，TradeClient是一个旨在成为超类的类，并且交换变量和eventProcessor方法旨在在子类中被覆盖，以便与不同的交换（对于套利等）兼容。 marketEvent方法被称为精细，但eventProcessor方法不是。

这是一个范围问题吗？好像它不应该是这样，并且传递eventProcessor一个event [：]的参数没有任何区别。

编辑：

marketEvent函数嵌套在onJoin中。我很抱歉没有明确说明情况就是这样 - 我曾假设缩进会使这一点清楚。下面粘贴了正确完整的代码。我希望调用eventProcessor的原因是为了使JSON的解析易于覆盖不同的交换。

from autobahn.asyncio.wamp import ApplicationSession
from autobahn.asyncio.wamp import ApplicationRunner
from asyncio import coroutine 
import sys
import json
from io import StringIO

poloniex_URL = "wss://api.poloniex.com"    

class TradeClient(ApplicationSession):

    exchange = "NULL"

    def eventProcessor(self, event):
        print("eventProcessor called")
        print("market event received: {}".format(event))

    def onJoin(self, details):
        print("{} client session ready".format(self.exchange))

        def marketEvent(event):
            print("marketEvent called")
            self.eventProcessor(self, event)

        # Read in configuration files
        try:
            pairs = [line.strip() for line in open("conf/" + self.exchange + ".conf")]
        except:
            print("Configuration file not found for {}!".format(self.exchange))
            sys.exit(1)

        # Subscribe to each currency pair / topic in the conf file
        for pair in pairs:
            try:
                yield from self.subscribe(marketEvent, pair)
                print("subscribed to {} on {}".format(pair, self.exchange))
            except Exception as e:
                print("could not subscribe to {} on {}: {}".format(pair, exchange, e))
                sys.exit(1)

class PoloniexClient(TradeClient):
    exchange = "poloniex"

poloniex_runner = ApplicationRunner(url = poloniex_URL, realm = "realm1")
poloniex_runner.run(PoloniexClient)

Python：类方法不会被同一个类中的另一个方法调用

0 个答案: