Python3 -如何在kivymd中加载文件？(并将其路径存储为字符串)

from kivymd.app import MDApp
from kivymd.uix.filemanager import MDFileManager
from kivymd.uix.button import MDFlatButton

class MyApp(MDApp):
    def __init__(self, **kwargs):
        super().__init__(**kwargs)
        self.file_manager = MDFileManager(
            exit_manager=self.exit_manager,
            select_path=self.select_path,
        )

    def build(self):
        button = MDFlatButton(text="Open File", on_release=self.open_file)
        return button

    def open_file(self, *args):
        self.file_manager.show('/path/to/initial/directory')  # 设置初始目录

    def select_path(self, path):
        self.file_manager.close()
        path_str = str(path)  # 将路径转换为字符串
        # 在这里可以对路径进行进一步处理或保存
        print("Selected path:", path_str)

    def exit_manager(self, *args):
        self.file_manager.close()

if __name__ == "__main__":
    MyApp().run()