使用匿名函数进行参数的传递，可以传递多个参数，也可以只传递一个

self.upLoadNewBtn.clicked.connect(lambda: self.upload_dir("new", ))

self.upLoadNewBtn.clicked.connect(lambda: self.upload_dir("new", ))# 选择文件夹
def upload_dir(self, upload_type):dir_path = QFileDialog.getExistingDirectory(None, '选择excel所在文件夹', './', QFileDialog.ShowDirsOnly)if not dir_path:returnif not os.path.exists(dir_path):returnif upload_type == "new":self.newDirEdit.setText(dir_path)elif upload_type == "old":self.oldDirEdit.setText(dir_path)