name '' ''未定义

使用pyqt时一直提示：
ImportError: cannot import name 'Ui_MainWindow' from 'one' (D:\code_1\my_pyqt\one.py)

```python
if __name__ == '__main__':
    import sys
    from PyQt5.QtWidgets import QApplication, QMainWindow
    import pisc # 导入添加的资源（根据实际情况填写文件名）
    app = QApplication(sys.argv)

    MainWindow = QMainWindow()
    ui = Ui_MainWindow()
    ui.setupUi(MainWindow)

    MainWindow.show()

    sys.exit(app.exec_())

D:\code_1\my_pyqt\venv\Scripts\python.exe D:/code_1/my_pyqt/main.py 
Traceback (most recent call last):
  File "D:\code_1\my_pyqt\main.py", line 6, in 
    from one import Ui_MainWindow
ImportError: cannot import name 'Ui_MainWindow' from 'one' (D:\code_1\my_pyqt\one.py)

Process finished with exit code 1

错误提示已经很清楚了，看一下my_pyqt目录下有没有一个叫one.py的文件。或者检查一下import的Ui_MainWindow包是否引用对。