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這只是我的代碼的一部分。當我點擊btn_convert或btn_save function（self.convertThread.start和self.convert_and_save）工作。但是當我點擊btn_convert_save，只能工作self.open。問題是，爲什麼點擊btn_convert_save後不能啓動全部3個功能？如何在單擊按鈕上運行3（帶線程）功能？
class Window(QtGui.QMainWindow):
def __init__(self):
super(Window, self).__init__() ...
def home(self):
self.saveThread = SaveThread()
self.convertThread = ConvertThread()
btn_convert.clicked.connect(self.convertThread.start)
btn_save.clicked.connect(self.saveThread.start)
btn_convert_save.clicked.connect(self.convert_and_save) ...
def convert_and_save(self):
self.open()
self.convertThread.start
self.saveThread.start
#self.convert()
#self.save_file()
class SaveThread(QtCore.QThread):
def __init__(self):
super(SaveThread, self).__init__()
def run(self):...
class ConvertThread(QtCore.QThread):
def __init__(self):
super(ConvertThread, self).__init__()
def run(self):...