如何在Maya中添加eventFilter

import maya.OpenMaya as OpenMaya
import maya.OpenMayaMPx as OpenMayaMPx

class MyEventFilter(OpenMayaMPx.MPxEventNode):
    def __init__(self):
        OpenMayaMPx.MPxEventNode.__init__(self)

    def processEvent(self, event):
        # 在这里处理事件
        return True

def nodeCreator():
    return OpenMayaMPx.asMPxPtr(MyEventFilter())

def nodeInitializer():
    pass

def initializePlugin(obj):
    plugin = OpenMayaMPx.MFnPlugin(obj, "YourName", "1.0", "Any")
    try:
        plugin.registerNode("eventFilterNode", MyEventFilter.kPluginNodeId, nodeCreator, nodeInitializer)
    except:
        sys.stderr.write("Failed to register node.\n")
        raise

def uninitializePlugin(obj):
    plugin = OpenMayaMPx.MFnPlugin(obj)
    try:
        plugin.deregisterNode(MyEventFilter.kPluginNodeId)
    except:
        sys.stderr.write("Failed to deregister node.\n")
        raise

import maya.cmds as cmds
cmds.loadPlugin("eventFilterPlugin")