python - How add keyboard shortcut where one is missing from standard button on PyQT5 QMessageBox?

Question

Upon creating a message box with standard buttons in PyQT5, I find that only some of them have keyboard shortcuts. How do I add shortcuts where they aren't given?

Here, for example, a message box with 9 standard buttons. Only five of them have shortcuts: Yes, No, Ok, Cancel, Save.

from PyQt5 import QtCore
from PyQt5.QtWidgets import QApplication, QMessageBox
Q = QApplication([])
M = QMessageBox()
M.setWindowTitle( 'What the ...?' )
M.setText( 'eh?' )
M.setStandardButtons( QMessageBox.Ignore | QMessageBox.No | QMessageBox.Yes  )
M.setDefaultButton( QMessageBox.No )
M.exec()

Answer 1

等待大神答复