控制台报如下警告信息
)D:\code\vnpy\envs\lib\site-packages\qtpy__init__.py:214: RuntimeWarning: Selected binding "pyside6" could not be found, using "pyqt5"
warnings.warn('Selected binding "{}" could not be found, '
No QCoreApplication instance found. Application patches not applied. You have to call load_stylesheet function after instantiation of QApplication to take effect.
