我正在尝试创建一个事件侦听器来订阅tick使用 Python 的外汇交易应用程序的（价格）事件。原始应用程序是一个本机 32 位 Windows 应用程序，名为元交易者4。这没有任何 API，所以mtapi https://github.com/vdemydiuk/mtapi/Bridge 是在 .NET 中设计的，允许其他编程语言与其交互。该应用程序定义了一些事件，其中两个是：QuoteUpdate and QuoteUpdated.
所以我想写一个监听器（delegate？） 使用python.net https://github.com/pythonnet/pythonnet订阅此活动。但由于我无法理解 .NET 代码是如何产生这些事件的，也不知道如何正确使用蟒蛇网，我无法让它发挥作用。我也不断遇到错误：
TypeError: 'EventBinding' object is not callable
谷歌搜索不会返回任何有用的东西，除了this https://github.com/pythonnet/pythonnet/blob/master/src/tests/leaktest.py#L3“修复我”评论。
这是我的代码：
import os, sys, clr
sys.path.append(r"C:\Program Files\MtApi")
asm = clr.AddReference('MtApi')
import MtApi as mt
res = 0
def printTick(symbol, ask, bid):
print('Tick: Symbol: {} Ask: {:.5f} Bid: {:.5f}'.format(symbol, ask, bid))
# Setup .NET API bridge connection
mtc = mt.MtApiClient()
res = mtc.BeginConnect('127.0.0.1', 8222);
#--------------------------------------
# Register and use the listener
#--------------------------------------
# This does NOT work!
mtc.QuoteUpdate += printTick
#...
我的代码的意图应该很清楚。
问：如何让我的听众在收到消息时触发QuoteUpdate.NET 事件？
以供参考：
- C# 中的 .NET 代码（来自MtApiClient.cs https://github.com/vdemydiuk/mtapi/blob/9eedf15e9e5aeda39e60fc76e6deb4dbdc92d289/MtApi/MtApiClient.cs看起来像这样：
...
private void _client_QuoteUpdated(MTApiService.MtQuote quote) {
if (quote != null) {
QuoteUpdate?.Invoke(this, new MtQuoteEventArgs(new MtQuote(quote)));
QuoteUpdated?.Invoke(this, quote.Instrument, quote.Bid, quote.Ask);
}
}
...
public event MtApiQuoteHandler QuoteUpdated;
public event EventHandler<MtQuoteEventArgs> QuoteUpdate;
public event EventHandler<MtQuoteEventArgs> QuoteAdded;
public event EventHandler<MtQuoteEventArgs> QuoteRemoved;
- 还有一个小VB 测试应用程序 https://github.com/vdemydiuk/mtapi/blob/master/TestClients/TestMtApi/TestMtApi/Form1.vb看起来像这样：
Imports MtApi
Public Class Form1
Private apiClient As MtApiClient
Public Sub New()
InitializeComponent()
apiClient = New MtApiClient
AddHandler apiClient.QuoteUpdated, AddressOf QuoteUpdatedHandler
End Sub
Sub QuoteUpdatedHandler(sender As Object, symbol As String, bid As Double, ask As Double)
Dim quoteSrt As String
quoteSrt = symbol + ": Bid = " + bid.ToString() + "; Ask = " + ask.ToString()
ListBoxQuotesUpdate.Invoke(Sub()
ListBoxQuotesUpdate.Items.Add(quoteSrt)
End Sub)
Console.WriteLine(quoteSrt)
End Sub
Private Sub btnConnect_Click(sender As System.Object, e As System.EventArgs) Handles btnConnect.Click
apiClient.BeginConnect(8222)
End Sub
Private Sub btnDisconnect_Click(sender As System.Object, e As System.EventArgs) Handles btnDisconnect.Click
apiClient.BeginDisconnect()
End Sub
End Class
UPDATE
作为参考，我们有以下相关的 DLL 调用，由属性、类型 and __doc__:
attr: QuoteAdded type: <class 'CLR.EventBinding'> doc: <n/a>
attr: QuoteRemoved type: <class 'CLR.EventBinding'> doc: <n/a>
attr: QuoteUpdate type: <class 'CLR.EventBinding'> doc: <n/a>
attr: QuoteUpdated type: <class 'CLR.EventBinding'> doc: <n/a>
attr: add_QuoteAdded type: <class 'CLR.MethodBinding'> doc: Void add_QuoteAdded(System.EventHandler`1[MtApi.MtQuoteEventArgs])
attr: add_QuoteRemoved type: <class 'CLR.MethodBinding'> doc: Void add_QuoteRemoved(System.EventHandler`1[MtApi.MtQuoteEventArgs])
attr: add_QuoteUpdate type: <class 'CLR.MethodBinding'> doc: Void add_QuoteUpdate(System.EventHandler`1[MtApi.MtQuoteEventArgs])
attr: add_QuoteUpdated type: <class 'CLR.MethodBinding'> doc: Void add_QuoteUpdated(MtApi.MtApiQuoteHandler)
attr: remove_QuoteAdded type: <class 'CLR.MethodBinding'> doc: Void remove_QuoteAdded(System.EventHandler`1[MtApi.MtQuoteEventArgs])
attr: remove_QuoteRemoved type: <class 'CLR.MethodBinding'> doc: Void remove_QuoteRemoved(System.EventHandler`1[MtApi.MtQuoteEventArgs])
attr: remove_QuoteUpdate type: <class 'CLR.MethodBinding'> doc: Void remove_QuoteUpdate(System.EventHandler`1[MtApi.MtQuoteEventArgs])
attr: remove_QuoteUpdated type: <class 'CLR.MethodBinding'> doc: Void remove_QuoteUpdated(MtApi.MtApiQuoteHandler)
类似问题：
实际上有 100 个相关的 SO 问题，我可能已经查看了其中 60% 以上，但用例的适用性几乎为零。其中一些是：
- Python 类是否像其他语言一样支持事件？ https://stackoverflow.com/questions/6158602/does-python-classes-support-events-like-other-languages
- 将此事件处理程序注册从 C# 转换为 VB.net 的正确方法是什么？ https://stackoverflow.com/questions/28387577/whats-the-correct-way-to-convert-this-event-handler-registration-from-c-sharp-t
- 如何将 VB 委托转换为 python 事件处理程序？ https://stackoverflow.com/questions/64851726/how-do-i-convert-a-vb-delegate-into-a-python-event-handler
-
https://ironpython.net/documentation/dotnet/dotnet.html https://ironpython.net/documentation/dotnet/dotnet.html（也可能相关）
- https://openbookproject.net/thinkcs/python/english3e/events.html https://openbookproject.net/thinkcs/python/english3e/events.html
- https://code.activestate.com/recipes/410686-c-style-events-in-python/ https://code.activestate.com/recipes/410686-c-style-events-in-python/
