python - Python ClassCastException java.lang.ClassCastException

Question

引发事件时，我的事件处理程序方法收到以下错误。

ClassCastException: java.lang.ClassCastException: 
org.python.core.PyMethod cannot be cast to org.sikuli.script.SikuliEventObserver

有人可以告诉我如何将我的 pymethod 显式转换为 eventobserver

def PostTransactionEvent(self):
    """ wait while posting transaction handler, make it run in the foreground """
    self.screen.onAppear("PostingTrans.png", self.WaitWhilePostingTransaction)
    self.screen.observe(Timeouts.Observe, background = False)

事件处理程序

def WaitWhilePostingTransaction(self, event):      
    self.screen.waitVanish(event.match, Timeouts.Wait)
    event.region.stopObserver()