我将继续回答自己。受https://stackoverflow.com/a/33453124/1995261的启发，我通过实现以下方法解决了这一问题：
1）我创建了一个
worker.py执行
_search_cast_阻止菜单的方法的。当此方法完成搜索时，它会发出两个信号：a）一个通知他恢复了该信号
list，以及b）该方法已完成。
#worker.pyfrom PyQt5.QtCore import QThread, QObject, pyqtSignal, pyqtSlotclass Worker(QObject): finished = pyqtSignal() intReady = pyqtSignal(list) def __init__(self): QObject.__init__(self) @pyqtSlot() def _search_cast_(self): self.cc = casting() self.cc.initialize_cast() availablecc = self.cc.availablecc self.intReady.emit(availablecc) self.finished.emit()
2）在“
main.py我转储了以下内容”并尝试在代码内用注释进行解释：
#main.pyfrom PyQt5.QtCore import QThread, QObject, pyqtSignal, pyqtSlotimport worker # This is to import worker.pyclass menubar(object): def __init__(self): signal.signal(signal.SIGINT, signal.SIG_DFL) self.cc.cast = None self.systray = True self.stopped = False self.obj = worker.Worker() # The worker is started with no parent! self.thread = QThread() # We initialise the Qthread class with no parent! self.obj.intReady.connect(self.onIntReady) # We receive the signal that the list is ready self.obj.moveToThread(self.thread) # Moving the object to the thread self.obj.finished.connect(self.thread.quit) # When the method is finished we receive the signal that it is finished self.thread.started.connect(self.obj._search_cast_) # We need to connect the above with the desired method inside the work.py self.app = QtWidgets.QApplication(sys.argv) def search_menu(self): self.SearchAction = self.menu.addAction("Search") self.SearchAction.triggered.connect(self.search_cast) def onIntReady(self, availablecc): # This method receives the list from the worker print ('availablecc', availablecc) # This is for debugging reasons to verify that I receive the list with the correct content self.availablecc = availablecc def search_cast(self): #This method starts the thread when self.SearchAction is triggered args.select_cc = True self.thread.start()这样，在搜索
list菜单时不会被阻塞，屏幕上不会显示任何错误，并且
threads监控它们的次数
activity monitor保持正确。
希望对大家有帮助。有关更精确的信息（我仍在学习PyQt，并且措辞可能不太好），建议您检查上面发布的链接。
